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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Ilmu Pertanian Indonesia Jurnal Fitopatologi Indonesia Jurnal Hortikultura Indonesia (JHI) Jurnal Natur Indonesia Journal of Tropical Soils Agrovigor: Jurnal Agroekoteknologi Jurnal Hortikultura JURNAL AGROTEKNOLOGI Jurnal Agroteknos Warta IHP (Warta Industri Hasil Pertanian) International Journal of Applied Biology Jurnal AGROSAINS dan TEKNOLOGI Journal of Tropical Crop Science Journal of Tropical Horticulture JERAMI Indonesian Journal of Crop Science Menara Perkebunan Jurnal Hexagro Media Pertanian Jurnal Manusia dan Lingkungan International Research Journal of Business Studies

Roedhy Poerwanto

Departemen Agronomi Dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor (IPB University), Jl. Meranti, Kampus IPB Darmaga, Bogor 16680, Indonesia

Author-ID : 342995

Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Energy Environmental Science Industrial & Manufacturing Engineering Medicine & Pharmacology Social Sciences

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Efektifitas Aplikasi In-vitro Rizobakteri Sebagai Agen Antagonis Layu Fusarium pada Pisang Rajabulu/AAB di Rumah Kaca Kasutjianingati .; Roedhy Poerwanto; Widodo .; Nurul Khumaida; Darda Efendi
Jurnal Hortikultura Indonesia Vol. 2 No. 1 (2011): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Research was conducted on a banana cultivar of Rajabulu/AAB inside the green house. This research was aimed to study the effect of rhizobacteria and the ability of in vitro bacterization to prevent FOC. This study was conducted using split plot design. The main plot was rhizobacteria treatments (P. fluorescens ES-32, B. subtilis SB-3, a mix of both types and without bacteria), sub plots consist of in vitro (2 weeks and 1 week prior to application) and in vivo (during acclimatization) bacterization. All treatments were repeated 3 times, each consist of 7 polibags. The result of rhizobacteria treatment (B. subtilis SB3 or P. fluorecens ES32) was able to reduce the Disease Severity (Rhizome Discoloration) caused by Fusarium oxysporum f.sp cubense (FOC). The incorporation of mixed rhizobacteria provided significant effect suppressing the infestation of FOC. The application of mix bacteria was better than single treatment.Keywords: B. subtilis, P. fluorecens, rhizome discoloration, fusarial wilt, suppressing

Perubahan Warna Kulit Buah Tiga Varietas Jeruk Keprok dengan Perlakuan Degreening dan Suhu Penyimpanan Hanifah Muthmainnah; Roedhy Poerwanto; Darda Efendi
Jurnal Hortikultura Indonesia Vol. 5 No. 1 (2014): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTColor is the main quality that determines the level of demand for citrus. Consumer prefersorange citrus, where as green citrus have high productivity in Indonesia. It causes local citrus cannot compete with imported citrus. One way that can make local citrus compete with import citrus is by improving of colour quality through degreening. This research was conducted to study the effect of degreening and storage temperature on color changes of tangerine peel. Research was conducted from June until July 2013 at the Laboratory of Center for Tropical Horticulture Studies, IPB. This research used a randomized complete factorial design group 2 factors with 3 replications. The first factor is degreening temperature (180 C and room temperature), second factor is storage temperature (180 C and room temperature). The results showed that interaction of degreening and storage temperature significantly affected skin coloration. Degreening treatment 180 C and room temperature storage on all three varieties of tangerines have the highest Citrus Colour Index (CCI) value at 15 HSP. The higher value of Citrus Colour Index, the higher orange skin colorationproduced.Key words : degreening temperature, orange, storage temperature, value of Citrus Color Index. ABSTRAKWarna merupakan kualitas utama yang menentukan tingkat permintaan konsumen terhadap buah jeruk. Konsumen lebih menyukai jeruk berwarna jingga, padahal di Indonesia jeruk yang tinggi produktivitasnya adalah jeruk berwarna hijau. Hal ini menyebabkan jeruk lokal kalah bersaing dengan jeruk impor. Salah satu cara supaya jeruk lokal dapat bersaing dengan jeruk impor adalah dengan melakukan degreening. Penelitian ini dilakukan untuk mempelajari efek degreening dan suhu penyimpanan terhadap perubahan warna kulit jeruk keprok. Penelitian dilaksanakan dari bulan Juni hingga Juli 2013 di Laboratorium Pusat Kajian Hortikultura Tropika, IPB. Penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) Faktorial dengan dua faktor dan tigaulangan. Faktor pertama adalah suhu degreening (180C dan suhu ruang), faktor kedua adalah suhu simpan (180C dan suhu ruang). Hasil penelitian menunjukkan interaksi suhu degreening dan suhu simpan nyata pada perubahan warna. Perlakuan degreening suhu 180C dan penyimpanan suhu ruang pada ketiga varietas jeruk keprok memiliki nilai Citrus Colour Index (CCI) tertinggi dibandingkan perlakuan lainnya pada 15 HSP. Semakin tinggi nilai CCI, maka warna kulit jeruk yang dihasilkan semakin jingga.Kata kunci: jingga, nilai Citrus Color Index, suhu degreening, suhu penyimpanan.

Optimasi Pertumbuhan Vegetatif dan Keragaan Tanaman Jeruk Keprok Borneo Prima (Citrus reticulata cv. Borneo Prima) melalui Pemangkasan dan Pemupukan Resa Sri Rahayu; Roedhy Poerwanto
Jurnal Hortikultura Indonesia Vol. 5 No. 2 (2014): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTMandarin citrus cv. Borneo Prima is superior local commodity that needs to be expaned for reduction of citrus import. Development of the commodity needs to follow good agricultural practice to optimize growth. The objectives of this research were to optimize vegetative growth and treearchitecture of mandarin citrus cv. Borneo Prima by various dosages of nitrogen fertilizer and pruning. This research used Randomize Complete Block Design (RCBD) with two factors. The first factor was various dosage of nitrogen fertilizer consisting of four levels: 0 g (P0), 10 g (P1), 20 g (P2), and 30 g (P3). The second factor was pruning shape consisting of three levels: no pruning (K1), open center pruning (K2), and hedge pruning (K3). The results showed that dosages of nitrogen fertilizer did not give significant effect variables of vegetative growth and plant architecture except for Leaf Area Index (LAI). Pruning had significant effect to variables of vegetative growth and plant architecture. Hedge pruning and open center pruning were significantly different from no pruning treatment on tree architecture’s by expanding canopy surface to absorb sunlight. Interaction between nitrogen fertilizer dosages and pruning shapes were not significant.Keywords: canopy surface, hegde pruning, mandarin citrus cv. Borneo Prima, vegetatif growth ABSTRAKJeruk keprok Borneo Prima merupakan komoditas lokal unggulan yang perlu dikembangkan sebagai upaya untuk mengurangi impor jeruk. Pengembangan jeruk ini harus memperhatikan teknik budi daya yang baik untuk mengoptimalkan pertumbuhan. Tujuan penelitian ini adalah mengoptimalkan pertumbuhan vegetatif dan keragaan tanaman jeruk keprok Borneo Prima melalui berbagai dosis pupuk nitrogen dan bentuk pemangkasan. Kegiatan penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) faktorial dengan dua faktor. Faktor pertama adalah dosis pupuk nitrogen yang terdiri atas empat taraf: 0 g (P0), 10 g (P1), 20 g (P2), dan 30 g (P3)pertanaman. Faktor kedua adalah bentuk pemangkasan yang terdiri atas tiga taraf: tanpa pemangkasan (K1), pangkas terbuka tengah (K2), dan pangkas pagar (K3). Hasil penelitian menunjukkan bahwa dosis pupuk nitrogen tidak memberikan pengaruh yang nyata terhadap peubahpeubah pertumbuhan vegetatif dan keragaan tanaman kecuali Indeks Luas Daun (ILD). Bentuk pemangkasan memberikan pengaruh yang nyata terhadap peubah-peubah pertumbuhan vegetatif dan keragaan tanaman. Perlakuan pangkas pagar dan pangkas terbuka tengah berbeda nyata dengan perlakuan tanpa pemangkasan terhadap bentuk keragaan tanaman dengan memperluas permukaan kanopi untuk menyerap cahaya matahari. Tidak ada interaksi antara dosis pupuk nitrogen dan bentuk pemangkasan.Kata kunci: jeruk keprok Borneo Prima, pangkas pagar, permukaan kanopi, pertumbuhan vegetatif, pangkas terbuka tengah

Penggunaan Benzil Amino Purin (BAP) pada Okulasi Jeruk Keprok (Citrus reticulata) Nur Wahyu Sariningtias; Roedhy Poerwanto; Endang Gunawan
Jurnal Hortikultura Indonesia Vol. 5 No. 3 (2014): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTMandarins (Citrus reticulata) is one of the important fruit commodity in Indonesia. The problems that often arise in the development is the availability of healthy seedlings and in large numbers. The purpose of this research was to determine the effect of Benzyl Amino Purines (BAP) onthe success of budding and bud growth on the plant mandarins Borneo Prima and Garut Dataran Rendah. This research was conducted at the Pasir Kuda Experimental Farm, Ciomas, Bogor in January to May 2013. This experiment was arranged in a randomized complete block design with two factors of the scions varieties (Borneo Prima and Garut Dataran Rendah) and the concentration of BAP (0, 5, 10, and 15 ppm), repeated 3 times so there were 24 experimental units. The research data was analyzed statistically using F test at 5% and continued with DMRT test at 5%. The results showed that the application of BAP at low concentration on the scions of the two varieties do not give significantly different results in the variable of success of budding and growth of plant shoots.Keywords: bud, cytokinin, nutrition, rootstock, scion ABSTRAKJeruk keprok (Citrus reticulata) merupakan salah satu komoditas buah yang penting di Indonesia. Permasalahan yang sering muncul dalam pengembangan jeruk keprok adalah ketersediaan bibit yang sehat dalam jumlah banyak. Tujuan penelitian ini adalah untuk mengetahui pengaruh pemberian Benzil amino purin (BAP) terhadap keberhasilan okulasi dan pertumbuhan tunas pada tanaman jeruk keprok Borneo Prima dan Garut Dataran Rendah. Penelitian ini dilaksanakan di Kebun Percobaan Pasir Kuda, Ciomas, Bogor pada bulan Januari sampai bulan Mei tahun 2013. Penelitian disusun dalam rancangan kelompok lengkap teracak (RKLT) faktorial dengan dua faktor yakni varietas batang atas (Borneo Prima dan Garut Dataran Rendah) dan konsentrasi BAP (0, 5, 10, 15 ppm), diulang 3 kali sehingga terdapat 24 unit percobaan. Data hasil percobaan dianalisis secara statistika dengan uji F pada taraf nyata 5% dan dilanjutkan dengan uji lanjutan DMRT pada taraf nyata 5% untuk nilai yang berbeda nyata. Hasil penelitian menunjukkan bahwa pemberian BAP dengan konsentrasi rendah pada dua varietas batang atas jeruk keprok tidak memberikan hasil yang berbeda nyata pada peubah keberhasilan okulasi dan pertumbuhan tunas tanaman.Kata kunci: batang atas, batang bawah, nutrisi, sitokinin, tunas

Seleksi Hasil Persilangan antara ‘Queen’ dan ‘Smooth Cayenne’ untuk Perbaikan Hasil dan Mutu Buah Nenas Muhammad Arif Nasution; Roedhy Poerwanto; , Sobir; Memen Surahman; , Trikoesoemaningtyas
Jurnal Hortikultura Indonesia Vol. 1 No. 1 (2010): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTHybridization program was started in PKBT IPB Bogor in 2003, entangles of 12 parental cultivars, consisting of five type Smooth Cayenne cultivars and seven type Queen cultivars. The cross yielded 195 genotypes with various different character combinations. The result of cluster analysis based on morphological characters showed that there were 33 groups of hybrid at the degree of genetic similarity of 50%. The result of principal component analysis indicated that, between yield component characters and result most importantly, were fruit weight, fruit diameter and fruit length which were main supporting character of variance in hybrid result of the crosses. Descriptive results of fruit yield and quality characters showed three to five classes with the highest number of individuals around the mean value for each character. Fruit weight, crown weight, fruit length, fruit diameter, flesh thickness, core diameter, total soluble solid (TSS), total acid, vitamin C, pH, plant height, and peduncle length, were characters controlled by nuclear genes.Key words : hybridization, variability, Smooth Cayenne, Queen, genotype

Studi Karakter Mutu Buah Pepaya IPB Ketty Suketi; Roedhy Poerwanto; Sriani Sujiprihati; , Sobir; Winarso D.Widodo
Jurnal Hortikultura Indonesia Vol. 1 No. 1 (2010): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTThe objective of the experiment was to investigate the physical and chemical characteristic of eight genotypes of papaya i.e. IPB1, IPB 2A, IPB 3, IPB 3A, IPB 4, IPB 7, IPB 8, and IPB 9 on two stages of ripening period based on percentage of the yellow area of fruit peel (75% yellow and 100% yellow). The fruits were picked at 25% yellow of fruit peel colour. The experiment was conducted in split plot wi th completely randomized block design. The main plot was ripening periods of 75% and 100% ripe, while the genotypes were taken at subplot. There was no significant different on physical and chemical characteristics between papaya at stadium 75% and 100% yellow. Flesh firmness of IPB 9 was better than IPB 1, IPB 4 and IPB 8. Ascorbic acid content of IPB 4 (107.36 mg/100 g) was higher than that of IPB 2A and IPB 3A. Carotenoid content of IPB 4 (29. 73 mg/100g) was higher than that of the other genotypes.Key words: Carica papaya, physical characteristic, chemical characteristic, ascorbic acid, carotenoid

Pengaruh Aplikasi Kalsium terhadap Getah Kuning pada Buah Manggis (Garcinia mangostana L.) Indah Wulandari; Roedhy Poerwanto
Jurnal Hortikultura Indonesia Vol. 1 No. 1 (2010): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTThis experiment was conducted to study the effect of calcium applicatian on gamboge in mangosteen fruit. Calcium materials used in this research was dolomite. This research was conducted from November 2007 to April 2008 at mangosteen orchard, Karacak, Leuwiliang, Bogor. The treatment design was Randomized Completely Block Design with three replications. The experiment consist of one factor, i.e. dosages of calcium (0, 2.5, 3.0 and 3.5 ton Ca2+/ ha). The result showed that dolomite application with dosage of 3.5 ton Ca2+/ha reduced gamboge in mangosteen rind significantly than control (0 ton Ca2+ha- 1) but no significant effect on gamboge in mangosteen aryl.Key words: dolomite, dosages, rind, and aryl

Waktu dan Dosis Aplikasi Kalsium dan Boron untuk Pengendalian Getah Kuning pada Buah Manggis (Garcinia mangostana L.) di Tiga Sentra Produksi Vandra Kurniawan; Roedhy Poerwanto; Darda Efendi
Jurnal Hortikultura Indonesia Vol. 7 No. 1 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTContamination of yellow sap (GK) in the mangosteen fruit leads to low quality of the mangosteen fruit. GK contamination occurs because the cell walls of the fruit is weak due to lack of calcium (Ca) and boron (B). Ca and B plays a role in maintaining the integrity of the cell wall. The study aimed to get the best treatment of dose and the time of application of Ca and B in controlling the contamination of GK on the aryl and mangosteen pericarp. This study used a nested design with 3 factors. First factor was study site, consisting of Cigudeg, Citeureup and Cikembar. The second factor was combination dose of fertilizer, consisting of control (without Ca + B), 1.6 kg Ca tree-1 + 1.553 g B tree-1, and 3.2 kg of Ca tree-1 + 1.553 g B tree-1. The third factor was time of fertilizer application, consisting of anthesis, stadia 1, and anthesis + stadia 1of fruit development. Result of the study showed that location which produced the best fruit was Cikembar where GK on aryl was 22.49% and on pericarp was 29.51%. A dose of 1.6 kg Ca tree-1 + 1.55 g B tree-1 and 3.2 kg Ca tree- 1 + 1.55 g B tree-1 were equally well in reducing GK contamination In aryl (19.91%) and pericarp (28.86%) compared to treatment without Ca and B which showed percentage of GK contaminated fruit on aryl was 50.00% and on pericarp was 56.46%. Ca and B application time was the best at stage 1, which lowered the percentage of GK contamination in aryl (40.44%) and pericarp (27.10%). Ca and B did not affect the physicochemical qualities including diameter, weight, hardness, total soluble solid, total titratable acidity of mangosteen fruit in three study sites.Keywords: fertilization, immobile nutrient, cell wall, pericarp, yellow sap.ABSTRAKCemaran getah kuning (GK) pada buah manggis menyebabkan rendahnya mutu buah manggis. Cemaran GK terjadi karena dinding sel buah lemah akibat kekurangan unsur kalsium (Ca) dan boron (B). Ca dan B berperan dalam menjaga integritas dinding sel. Penelitian bertujuan untuk mendapatkan dosis dan waktu aplikasi Ca dan B yang terbaik dalam mengendalikan cemaran GK pada aril dan kulit buah manggis. Penelitian ini menggunakan Rancangan Tersarang (Nested Design) 3 faktor. Faktor ke-1 adalah lokasi penelitian, terdiri dari Cigudeg, Citeureup dan Cikembar. Faktor ke-2 adalah kombinasi dosis pupuk yaitu kontrol (tanpa Ca + B), 1.6 kg Ca pohon-1 + 1.553 g B pohon-1, dan 3.2 kg Ca pohon-1 + 1.553 g B pohon-1. Faktor ke-3 adalah waktu aplikasi pupuk yaitu pada saar antesis, Stadia 1, dan Antesis + Stadia 1 dari perkembangan buah. Hasil penelitian menunjukkan bahwa lokasi penelitian dengan kualitas fisik buah terbaik adalah di Cikembar dengan persentase cemaran GK pada aril (22.49%) dan kulit (29.51%). Dosis 1.6 kg Ca pohon-1 + 1.55 g B pohon-1 dan 3.2 kg Ca pohon-1 + 1.55 g B pohon-1 sama baiknya dalam menurunkan cemaran GK di aril (19.91%) dan di kulit (28.86%) dibandingkan dengan perlakuan tanpa Ca dan B menunjukkan persentase buah tercemar GK pada aril (50.00%) dan kulit (56.46%). Waktu aplikasi Ca dan B yang terbaik adalah pada stadia 1 yang menurunkan persentase cemaran GK di aril (40.44%) dan kulit (27.10%). Ca dan B tidak mempengaruhi kualitas fisikokimia yang mencakup diameter, bobot, kekerasan, padatan terlarut total, asam tertitrasi total buah manggis di tiga lokasi penelitian.Kata kunci: pemupukan, hara tidak mobil, dinding sel, pericap, getah kuning.

Degreening Buah Jeruk Siam (Citrus nobilis) pada Beberapa Konsentrasi dan Durasi Pemaparan Etilen Nian Rimayanti H.; Roedhy Poerwanto; Ketty Suketi
Jurnal Hortikultura Indonesia Vol. 7 No. 2 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTSiam tangerine peel is green when harvested. Degreening technology by ethylene can improve the citrus peel color becomes uniformly orange. Degreening is a process to break down green pigment (chlorophyll) on citrus peel chemically and form the orange color (carotene) without affecting internal quality of fruit. The purpose of this research was to determine the effect of ethylene concentration and ethylene exposure duration to bring out the color on Siam tangerine from Banyuwangi. Ethylene 0, 100, 200 ppm was injected into the box containing 2.8 kg citrus and was exposed to the cooling chamber with a temperature 18 0C for 24 hours ethylene + 48 hours without ethylene, 48 hours ethylene + 24 hour without ethylene and 72 hours ethylene. Ethylene exposure was conducted using multiple shots method. After exposure, tangerines were put at room temperature condition. Observations were conducted every two days: (a) non-destructive observation conducted using color reader to determine the color changes; (b) destructive observations for measuring chlorophyll and carotenoids content and physico-chemical changes i.e. the hardness, soluble solid content, titratable acidity and vitamin C. The results showed that the best combination was 200 ppm ethylene concentration for 48 hours ethylene exposure. This degreening technique altered the Citrus Colour Index (CCI) value from -1.60 to be 6.50, changed the tangerines into a bright orange. Degreening did not give negative impact on internal quality.Key words: carotenoid, chlorophyll, citrus color index, cooling chamber, tropical citrus ABSTRAKWarna kulit buah jeruk siam saat dipanen umumnya hijau. Teknologi degreening menggunakan gas etilen dapat memperbaiki warna kulit jeruk tropika menjadi jingga. Degreening merupakan proses perombakan pigmen hijau (klorofil) pada kulit jeruk secara kimiawi dan membentuk warna jingga (karotenoid) tanpa mempengaruhi kualitas internal buah. Penelitian bertujuan mengkaji pengaruh konsentrasi dan durasi pemaparan etilen untuk menstimulasi pigmen jingga dan pengaruhnya terhadap sifat fisikokimia jeruk siam Banyuwangi. Degreening jeruk menggunakan etilen 0, 100, dan 200 ppm diinjeksikan ke dalam box degreening yang berisi jeruk 2.8 kg dan dipaparkan pada cooling chamber dengan suhu 18 0C selama 24, 48, dan 72 jam. Pengamatan dilakukan setiap dua hari: (a) pengamatan non-destruktif dengan menggunakan color reader untuk mengetahui perubahan warna; (b) pengamatan destruktif dengan mengukur kekerasan, kandungan klorofil dan karotenoid, Padatan Terlarut Total (PTT), Asam Tertitrasi Total (ATT) dan vitamin C untuk mengetahui perubahan fisikokimia jeruk. Hasil penelitian menunjukkan perubahan warna kulit buah mulai terjadi pada hari ke 4 setelah perlakuan degreening. Konsentrasi etilen terbaik adalah 200 ppm dengan durasi pemaparan 48 jam yaitu dapat meningkatkan kualitas warna buah jeruk siam dari hijau menjadi jingga kekuningan dan mampu mengubah nilai Citrus Colour Index (CCI) dari -1.60 (hijau) menjadi 6.50 (jingga kekuningan), tanpa pengaruh negatif terhadap kualitas fisikokimia buah.Kata kunci: cooling chamber, citrus color index, jeruk tropika, karotenoid, klorofil

Aplikasi Kalsium dan NAA untuk Mengendalikan Getah Kuning Buah Manggis (Garcinia mangostana L.) Yulinda Tanari; Darda Efendi; Roedhy Poerwanto; Didy Sopandie; Ketty Suketi
Jurnal Hortikultura Indonesia Vol. 9 No. 1 (2018): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

ABSTRACTThe yellow sap is produced naturally in mangosteen organ except in the root. The yellow sap contaminated the aryl and rind if the epithelial cell walls rupture due to deficiency of calcium (Ca). Calcium is one of structural component of cell walls, whereas naphthaleneacetic acid (NAA) has its role in improving cell division and cell elongation. Interaction of Ca and NAA can improve sink strength and capacity because the newly formed cells need Ca to construct wall structure. This experiment aimed at finding out the effect of Ca and NAA applications in reducing the contamination of yellow sap in mangosteen. The experiment was conducted by using factorial random block design consisting of 2 factors and 3 replications. The first factor was Ca dosage (0 and 4.8 kg/tree), and the second factor was NAA concentration (0, 200, 400 and 600 ppm). The results showed that application of 4.8 Ca/tree and 200 ppm NAA as much as 5 ml / fruit effectively improve the content of Ca pectate in pericarp, reduced the percentage of yellow sap contamination on the fruit segment, aryl and rind to 0% and 12.3% respectively compared to control (17.8% on fruit segment, 36.8% on aryl and 56.1% on rind).Key words: aryl, Ca pectate, cell wall, middle lamela.ABSTRAKGetah kuning adalah getah yang dihasilkan secara alami pada setiap organ manggis, kecuali pada akar. Getah kuning akan keluar dan mencemari aril serta kulit jika dinding sel epitel pecah karena kekurangan kalsium (Ca). Kalsium adalah komponen dinding sel, berperan dalam struktur dan permeabilitas membran sedangkan asam naftalenasetat (NAA) berperan penting dalam meningkatkan pembelahan dan pembesaran sel. Interaksi keduanya dapat meningkatkan kapasitas sink buah karena sel yang baru terbentuk membutuhkan Ca dalam menyusun struktur dinding sel. Percobaan bertujuan untuk mengetahui pengaruh aplikasi Ca dan NAA dalam menurunkan cemaran getah kuning manggis. Percobaan menggunakan rancangan acak kelompok faktorial 2 faktor dengan 3 ulangan. Faktor ke-1 yaitu dosis Ca (0 dan 4.8 kg Ca/pohon) dan faktor ke-2 yaitu konsentrasi NAA (0, 200, 400 dan 600 ppm) dengan volume semprot 5 ml perbuah. Hasil percobaan menunjukkan bahwa aplikasi 4.8 kg Ca/pohon dengan NAA 200 ppm sebanyak 5 ml/buah efektif meningkatkan kandungan Ca pektat perikarp dan menurunkan persentase buah tercemar getah kuning menjadi 0% pada juring dan aril serta 12.3% pada kulit dibandingkan dengan perlakuan kontrol (17.8% pada juring, 36.8% pada aril dan 56.1% pada kulit buah).Kata kunci: aril, Ca pektat, dinding sel, lamela tengah

Co-Authors , Dorly , Sakhidin , Yudiwanti . DARMAWAN . SAMANHUDI . SUHARSONO Abdul Munif Achmad Surkati Ade Wachjar Agus Purwito Ahmad Ghozi Manshuri Ahmad Ghozi Mansyuri Ahmad S. Abidin Ahmad Sutopo Akmal, Ajmir ALI NURMANSYAH Alifiya Herwitarahman Anas D Susila Anas Dinurrohman Susila Andria Agusta ANDRIA AGUSTA Ansyori, Ansyori Aris Purwanto Asmini Budiani Bambang S . Purwoko Bambang S. Purwoko Bambang Sapta Purwoko Cenra Intan Hartuti Tuharea CICIK SURIANI D Fatria D Fatria Deden Derajat Matra Defitrianida, Asyhuriyah Wardah Dewi Sukma Dhika Prita Hapsari Dian Fahrianty Didy Sopandie Djoko Santoso Dorly Dorly E Efendi Edi Santosa Edi Santosa Edi Santosa Efendi, Darda EKO SETIAWAN Eko Setiawan Endah Retno Palupi Endang Gunawan Faqih Udin Fauziyah Harahap Fumio Fukuda HAJRIAL ASWIDINNOOR Hanifah Muthmainnah Hartrisari Hardjomidjojo Hiroshi Inoue I Hidayati I MADE ARTIKA I NYOMAN RAI Ilmi, Nadhirah Karimatul Iman Rusmana Inanpi Hidayati Sumiasih, Inanpi Hidayati Indah Wulandari INDAH WULANDARI Irsyad Maulana Iskandar Lubis Jawal Muhammad Anwarudinsyah Juanasri Juanasri JULIARNI JULIARNI Kasutjianingati . Ketty Suketi Kuniyuki Saitoh La Ode Safuan Laksono Trisnantoro Latifah K. Darusman Latifah Kosim Darusman Lizawati . Lubis, Wahyu Muhammad Yuha Lukman Liferdi Machfud Machfud Marimin Marimin Matra, Deden Derajat Maulana, Mohamad Akhbar Memen Surahman Mohamad Akhbar Maulana Mohamad Rahmad Suhartanto Muhamad Noor Azizu, Muhamad Noor Muhammad Arif Nasution Muhammad Darmawan Musdalifah, Nuzlul Naohiro Kubota Nian Rimayanti H. Nobuo Sugiyama Nono Sutrisno Nono Sutrisno Nur Wahyu Sariningtias Nurfitri Ramadhani Nurul Khumaida Odit Ferry Kurniadinata Qadir, Abdul Rahayu, Resa Sri Rahmat Budiarto Ramdan Hidayat Rd. Selvy Handayani Resa Sri Rahayu Resa Sri Rahayu Retno Astuti Riana Jumawati Rofiq, Muhamad Abdul Roza Yunita S Susanto Santun R.P. Sitorus Septirosya, Tiara Slamet Susanto Soaloon Sinaga Sobir Sobir SOEKISMAN TJITROSEMITO Sri Astuti Rais Sri Yuliani Sri Yuliani Sriani Sujiprihati SRIANI SUJIPRIHATI Suci Rahayu Sudarsono Sudirman Yahya Suryo Wiyono Sutrisno, Sutrisno T Purnama Tanari, Yulinda Taruna Shafa Arzam Taruna Shafa Arzam, Taruna Shafa TARUNI SRI PRAWAST MIEN KAOMINI ANY ARYANI DEDY DURYADI SOLIHIN Tetty CHAIDAMSARI Tiara, Dede Titin Purnama Tri Muji Ermayanti Trikoesoemaningtyas Vandra Kurniawan Wa Ode Muliastuty Widya Sari Winarso D. Widodo Y A Purwanto Y A Purwanto Yandra Arkeman Yundari, Yundari Yunus, Ismadi

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