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INDONESIA
Menara Perkebunan
Published by Pusat Penelitian Kelapa Sawit
ISSN : 01259318     EISSN : 18583768     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Menara Perkebunan as a communication medium for research in estate crops published articles covering original research result on the pre- and post-harvest biotechnology of estate crops. The contents of the articles should be directed for solving the problems of production and/or processing of estate crops of smallholder, private plantations and state-owned estates, based on the three dedications of plantation. Analyses of innovative research methods and techniques in biotechnology, which are important for advancing agricultural research. Critical scientific reviews of research result in agricultural and estate biotechnology.
Arjuna Subject : -
Articles 3 Documents
 1 
Search results for , issue "Vol 71, No 2: Desember 2003" : 3 Documents clear
Transformasi kopi robusta (Coffea canephora) dengan gen kitinase melalui Agrobagterium tumefaciens LBA4404 Transformation of robusta coffee (Coffea canephora) with chitinase gene mediated by Agrobacterium tumefaciens LBA4404 . SISWANTO; Fetrina OKTAVIA; Asmini BUDIANI; . , SUDARSONO; . PRIYONO; Surip MAWARDI
E-Journal Menara Perkebunan Vol 71, No 2: Desember 2003
Publisher : INDONESIAN RESEARCH INSTITUTE FOR BIOTECHNOLOGY AND BIOINDUSTRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1075.003 KB) | DOI: 10.22302/iribb.jur.mp.v71i2.162

Abstract

SummaryGenetic engineering of robusta coffee forresistance to pathogenic fungi is considered to beone of the potential approaches to overcome theproblem at robusta coffee plantation caused bypathogenic fungi. This research was aimed tointroduce chitinase (CHI) gene into embryogeniccalli of robusta coffee and regenerate theplantlets. Embryogenic calli were co-cultivatedwith Agrobacterium tumefaciens LBA4404harboring pCAMBIA1301 which containschitinase gene under 35S promoter. In thisresearch four concentrations (0, 50, 100 and150 mg/L) of acetosyringone (AC) were used inthe co-cultivation medium. Selection fortransformed calli was conducted by graduallyincreasing the concentration of hygromicin from5 to 25 mg/L. Somatic embryo (SE) was inducedfrom callus on the medium containing acombination of BAP 5 mg/L and IAA (0, 0.25 or0.50 mg/L). Integration CHI in plant genome wasexamined by GUS assay and PCR. The resultrevealed that among the four AC concentrationstested, 100 mg/L gave the highest percentage ofcalli growing on the selection medium (42.5%).BAP concentration of 5 mg/L alone was the mosteffective for inducing of SE from transformedcalli with the highest percentage of 43.1% andaverage number SE of 8.8 ± 3. The strongestGUS expression on the calli at 3 days aftertransformation and the calli grown on selectionmedium containing 150 mg/L AC, which were56.5% and 40% respectivelly. PCR analysisshowed that 7 out of 12 plantlets tested,contained CHI gene. From this research 28transgenic plantlets of robusta coffee wereobtainedRingkasanRekayasa genetika untuk merakit tanamankopi robusta tahan jamur pathogen dipandangmerupakan salah satu pendekatan alternatif yangpotensial untuk mengatasi masalah padaperkebunan kopi robusta akibat serangan jamurpatogen. Penelitian ini bertujuan untuk meng-introduksikan gen kitinase (CHI) ke dalam kalusembriogenik kopi robusta dan regenerasinyamenjadi planlet, sebagai upaya untuk merakittanaman kopi robusta tahan serangan jamur.Kalus embriogenik diko-kultivasi denganAgrobacterium tumefaciens LBA4404 pembawapCAMBIA1301 yang mengandung gen kitinasedi bawah kontrol promotor 35S. Pada percobaanini, empat konsentrasi asetosiringon (AS) (0, 50,100 dan 150 mg/L) digunakan dalam medium ko-kultivasi. Seleksi kalus hasil transformasidilakukan dengan peningkatan konsentrasi higro-misin secara bertahap dari 5 mg/L sampai25 mg/L. ES diinduksi dari kalus pada mediumyang mengandung BAP 5 mg/L dan IAA (0; 0,25dan 0,50 mg/L). Integrasi gen CHI ke dalamgenom tanaman dianalisis melalui uji GUS danPCR. Hasil penelitian menunjukkan bahwa darikeempat konsentrasi AS yang diuji, AS 100 mg/Lternyata menghasilkan persentase tertinggi kalusyang tumbuh pada medium seleksi (42,5%).Konsentrasi BAP 5 mg/L tanpa penambahan IAAefektif menginduksi ES dari kalus hasiltransformasi dengan persentase tertinggi 43,1%dan rata-rata jumlah ES 8,8±3. Ekspresi GUStertinggi dideteksi pada kalus tiga hari setelahtransformasi dan kalus yang tumbuh di mediumseleksi yang mengandung AS 150 mg/L,masing-masing 56,5% dan 40,0 %. Analisis PCRmenunjukkan bahwa 7 planlet dari 12 planletyang diuji, membawa gen CHI. Dari penelitianini dihasilkan 28 planlet kopi robusta transgenik.
Aktivitas fosfatase dan produksi asam organik di rhizosfer dan hifosfer bibit kelapa sawit bermikoriza *) Phosphatase activity and organic acid production in rhizosphere and hyphosphere of mycorrhizal oil palm seedling Happy WIDIASTUTI; Nampiah SUKARNO; Latifah Kosim DARUSMAN; Didiek Hadjar GOENADI; Sally SMITH; Edi GUHARDJA
E-Journal Menara Perkebunan Vol 71, No 2: Desember 2003
Publisher : INDONESIAN RESEARCH INSTITUTE FOR BIOTECHNOLOGY AND BIOINDUSTRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (249.025 KB) | DOI: 10.22302/iribb.jur.mp.v71i2.164

Abstract

SummaryStudies on the mechanism of the higher Puptake of oil palm seedling colonized witharbuscular mycorrhizal fungi throughsolubilizing of fixed P by organic acid orhydrolysis of organic P by phosphatase activityhave not been reported yet. This experiment wasaimed to examine the phosphatase activity andproduction of organic acids in rhizosphere andhyphosphere, mycorrhizal and non-mycorrhizaloil palm seedling. Oil palm seedling were grownfor 26 weeks in sterilized Cikopomayak acid soilin 20.5 cm diameter pots with three compart-ments, a central one for root growth(rhizosphere) and two adjacent on both side nextto the root compartment for hyphal growth(hyphosphere). Compartmentation was accom-plished by a 0.25 mm stainless steel filter. Allcompartment received a uniform concentration ofphosphorus (300 P mg kg -1 soil) either in organic(Na-phytate) or inorganic NH 4 HPO 4 form.Acaulospora tuberculata inoculum was establish-ed in pot culture using Pueraria phaseoloides as ahost, while Gigaspora margarita was propagatedusing maize as a host. AM fungal inoculumapplied as mixed propagules in optimum dosage.The experiment was conducted to asses ninetreatments combination between AM inoculation(without, A. tuberculata, and G. margarita) andsources of P (without P, inorganic P NH 4 HPO 4 ,and organic P Na phytate). Factorial in completerandomized design with two factors and threereplications was used in this research. In thehyphal compartment acid phosphatase activitywas much higher than alkaline phosphataseactivity, while in the rhizosphere alkalinephosphatase activity was higher compared toacid phosphatase activity. Acid phosphataseactivity in rhizosphere of oil palm seedlingsinoculated with A. tuberculata was significantlyhigher compared to uninoculated seedlings.However, both acid phosphatase activity andalkaline phosphatase activity were slightlyenhanced by mycorrhizal inoculation. In contrast,organic acid production between inoculatedseedling and uninoculated seedling was notsignificantly different. It seems that AM fungalsymbiosis with oil palm enhance mineralizationof organic P in spite of solubilization ofinorganic P.RingkasanMekanisme peningkatan pertumbuhankelapa sawit bermikoriza khususnya yangdisebabkan aktivitas pelarutan P anorganik yangterfiksasi melalui pelarutan oleh asam organikatau hidrolisis P organik oleh aktivitas fosfataseelum dilaporkan. Percobaan ini bertujuanmenetapkan aktivitas fosfatase dan produksi asamorganik di rhizosfer dan hifosfer, bibit kelapasawit bermikoriza dan tidak bermikoriza. Kelapasawit ditumbuhkan selama 26 minggu pada tanahmasam Cikopomnayak steril pada pot ber-diameter 20,5 cm yang terbagi atas tiga daerah,ruang tengah untuk pertumbuhan akar (rhizosfer)dan dua daerah di sebelahnya untuk pertumbuhanhifa (hifosfer). Penyekatan pot menggunakanfilter stainless steel berukuran lubang 0,25 mm.Semua daerah dipupuk P pada konsentrasi300 P mg kg -1 tanah baik dalam bentuk organik(Na-phytate) maupun anorganik (NH 4 HPO 4 )Inokulum CMA merupakan hasil perbanyakandengan sistem kultur pot menggunakan inangPueraria phaseoloides untuk Acaulosporatuberculata sedangkan untuk Gigasporamargarita menggunakan inang jagung. InokulumCMA berupa propagul campuran pada dosisoptimum. Percobaan dilakukan untuk mengujisembilan perlakuan yang merupakan kombinasiantara inokulasi CMA (tanpa, A. tuberculata,dan G. margarita) dan sumber P (tanpa P,anorganik P NH 4 HPO 4 , dan organik P Naphytate). Rancangan percobaan ialah rancanganacak lengkap faktorial dengan tiga ulangan untukmasing-masing perlakuan. Di hifosfer aktivitasfosfatase asam lebih tinggi daripada fosfatasealkalin, sedangkan di rhizosfer aktivitas fosfatasealkalin lebih tinggi dibandingkan dengan aktivitasfosfatase asam. Aktivitas fosfatase asam dirhizosfer bibit kelapa sawit yang diinokulasi A.tuberculata nyata lebih tinggi dibandingkandengan bibit yang tidak diinokulasi. Aktivitasfosfatase asam dan fosfatase alkalin sedikit lebihtinggi dengan inokulasi CMA. Sebaliknya,produksi asam organik antara bibit yangdiinokulasi dan bibit yang tidak diinokulasi tidakberbeda nyata. Tampak bahwa simbiosis CMAdengan kelapa sawit lebih meningkatkanmineralisasi P organik dan kurang meningkatkanpelarutan P anorganik.
Embriogenesis somatik langsung dan regenerasi planlet kopi arabika (Coffea arabica) dari berbagai eksplan Direct somatic embryogenesis and regeneration of arabica coffee plantlets (Coffea arabica) from different explants Fetrina OKTAVIA; . SWANTO; Asmini BUDIANI
E-Journal Menara Perkebunan Vol 71, No 2: Desember 2003
Publisher : INDONESIAN RESEARCH INSTITUTE FOR BIOTECHNOLOGY AND BIOINDUSTRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2082.995 KB) | DOI: 10.22302/iribb.jur.mp.v71i2.161

Abstract

SummaryTissue culture technique for arabica coffeefaces some problems, mainly in plantletsregeneration from cultured explants. Theobjectives of this experiment were to examine theeffect 2,4-D and 2-ip combinations on somaticembryogenesis and regeneration of arabicacoffee from several different explants. Basalmedium used in this experiment was MS mediumwith ½ concentration of macro and micro salts.Experiment to induce primary somatic embryos(SE) was arranged in factorial randomizedcomplete design with 10 repeats. The first factorwas the type of explants, leaf, epicotyl, hipocotyland root explants. The second factor was plantgrowth regulator i.e. combination of 1  M 2,4-Dwith 5, 10, 15, 20  M and combination of 5  M2,4-D with 5, 10, 15 and 20  M 2-ip. To multiplySE, secondary SE was induced from primary SEon medium containing combination of 0.6  MIAA and 13.3; 17.8 and 22.2  M BAP.Cotyledonary SE were germinated on mediacontaining GA 3 (0, 5, 10 and 15  M), and thenregenerated on medium free of growth regulator.Plantlets with 4-5 leaf pairs were transfered intothe soil medium for acclimatization. The resultsshow that primary SE can be induced from allexplants with the highest frequency on mediumcontaining 1  M 2,4-D and 15  M 2-ip.Induction of primary SE, in leaf explant wasmore effective than other explants. Mediumcontaining 0.6  M IAA and 22.2  M BAP gavethe highest percentage of SE multiplication i.e.52.6% with average SE number of 6.25. Plantletsregeneration can be conducted by culturing SEon maturation medium free of growth regulatorfor one month followed by germinating onmedium containing GA 3 , and then culturing onmedium free of growth regulator again. Thehighest percentage of germinated embryos wasobtained after three weeks and six weekscultured in the medium containing 5  M GA 3 , i.e49% and 90.15 respectively. From total plantletsobtained, 75% of them were normal. Sixtypercents of the young plants grew well in thegreenhouse.RingkasanTeknik kultur jaringan tanaman kopi arabikamasih menghadapi beberapa kendala terutamapada tingkat regenerasi planlet dari eksplan yangdikulturkan. Penelitian ini bertujuan untukmengetahui pengaruh kombinasi 2,4-D dan 2-ipterhadap embriogenesis somatik dan regenerasikopi arabika dari berbagai eksplan. Media dasaryang digunakan adalah medium MS ½konsentrasi garam makro dan mikro. Percobaaninduksi embrio somatik (ES) primer disusunmenurut rancangan acak lengkap faktorial dengan10 ulangan. Faktor pertama adalah jenis eksplan,erdiri atas daun, epikotil, hipokotil dan akar invitro. Faktor kedua adalah zat pengatur tumbuh,yaitu kombinasi 1 M 2,4-D dengan 5, 10, 15dan 20M 2-ip, serta kombinasi 5 M 2,4-Ddengan 5, 10, 15 dan 20 M 2-ip. Untuk mem-perbanyak jumlah ES yang didapatkan, dilakukaninduksi ES sekunder dari ES primer pada mediumyang mengandung kombinasi 0,6 M IAA dan13,3; 17,8 dan 22,2 M BAP. ES fase kotiledonkemudian dikecambahkan pada medium yangmengandung GA 3 (0, 5, 10 dan 15 M) danselanjutnya diregenerasikan pada medium tanpazat pengatur tumbuh. Planlet yang mempunyai4-5 pasang daun dipindahkan ke medium tanahuntuk aklimatisasi. Hasil yang diperolehmenunjukkan bahwa ES primer dapat diinduksipada semua eksplan yang digunakan denganfrekuensi tertinggi pada medium yang me-ngandung 1 M 2,4-D dan 15 M 2-ip. InduksiES primer pada eksplan daun lebih efektifdibandingkan eksplan lainnya. Untuk per-banyakan ES, medium yang mengandung IAA0,6 M dan BAP 22,2 M memberikanpersentase tertinggi pembentukan ES sekunderyaitu 52,6% dengan rata-rata jumlah ES 6,25.Regenerasi planlet dapat dilakukan denganmengkulturkan ES pada medium maturasi tanpazat pengatur tumbuh selama satu bulan, kemudiandikecambahkan dalam medium yang mengan-dung GA 3 , dan selanjutnya dipindah ke mediumtanpa zat pengatur tumbuh kembali.Perkecambahan ES tertinggi diperoleh padamedium dengan penambahan GA 3 5 M yaitu40,9% setelah tiga minggu dan 90,1% setelahenam minggu. Dari total planlet diperoleh 75%planlet normal. Hasil aklimatisasi menunjukkanbahwa 60% bibit mampu bertahan di rumah kaca.

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