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All Journal HAYATI Journal of Biosciences Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Jurnal Agronomi Tanaman Tropika (JUATIKA)
JULIARNI JULIARNI
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences

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Secretory Duct Structure and Phytochemistry Compounds of Yellow Latex in Mangosteen Fruit DORLY DORLY; SOEKISMAN TJITROSEMITO; ROEDHY POERWANTO; JULIARNI JULIARNI
HAYATI Journal of Biosciences Vol. 15 No. 3 (2008): September 2008
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.533 KB) | DOI: 10.4308/hjb.15.3.99

Abstract

Yellow latex is the main problem in mangosteen agribusiness, because it is one factor lowering the fruit quality. The structure of yellow latex secretory ducts in the flower and fruit as well as in the root, stem and leaf of mangosteen (Garcinia mangostana L.) seedling and the qualitative phytochemistry of yellow latex were studied. The ducts were branched, canal-like type. They were found in the exocarp, mesocarp, endocarp, aril of the fruit, flower, stem, and leaf. In the fruit, the biggest diameter of the secretory ducts was found in the endocarp. There were continuous secretory ducts from fruit stalk to the fruit. Ultrastructural observation showed that the ducts surrounded by specific epithelial cells, which were living cells containing dense cytoplasm with plastid, mitochondria and golgi apparatus organelles. The qualitative test indicated that the yellow latex collected from stem bark, outer part of fruit, young fruit pericarp, mature aril and young aril contained terpenoid, flavonoid and tannin, but not alkaloid, saponin and steroid, except in the young aril containing the steroid. Key words: secretory ducts, yellow latex, endocarp, aril, epithelial cells
Uptake and Distribution of Aluminum in Root Apices of Two Rice Varieties under Aluminum Stress MIFTAHUDIN MIFTAHUDIN; NURLAELA NURLAELA; JULIARNI JULIARNI
HAYATI Journal of Biosciences Vol. 14 No. 3 (2007): September 2007
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.356 KB) | DOI: 10.4308/hjb.14.3.110

Abstract

Aluminum (Al) toxicity is the major limiting factor of plant growth and production in acid soils. The target of Al toxicity is the root tip, which affects mainly on root growth inhibition. The aim of this research was to study the uptake and distribution of Al in root apices of two rice varieties IR64 (Al-sensitive) and Krowal (Al-tolerant), which were grown on nutrient solution containing 0, 15, 30, 45, and 60 ppm of Al. The root growth was significantly inhibited in both rice varieties at as low as 15 ppm Al concentration. The adventive roots of both varieties showed stunted growth in respons to Al stress. There was no difference in root growth inhibition between both rice varieties as well as among Al concentrations. Al uptake on root apices was qualitatively and quantitatively analyzed. Histochemical staining of roots using hematoxylin showed dark purple color on 1 mm region of Al-treated root apices. Rice var. IR 64 tended to take up more Al in root tip than Krowal did. However, there was no statistically significant difference (p = 0.176) in root Al content of both varieties in response to different concentration and period of Al treatments. Al distribution in root apices was found in the epidermal and subepidermal region in both rice varieties. Based on those results, rice var. Krowal that was previously grouped as Al-tolerant variety has similar root growth and physiological response to Al stress as compared to Al-sensitive variety IR64. Key words: aluminum, uptake, distribution, root, rice
Struktur Anatomi Daun Artemisia cina Berg. Ex Poljakov Hasil Kultur Jaringan Tri Muji Ermayanti; Juliarni Juliarni; Yuli Andry
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 9, No 3 (2004): October 2004
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v9i3.2911

Abstract

This study was conducted to investigate the anatomical structure of leaves of Artemisia cina Berg. ex Poljakov due to variances in leaf morphology during grown in vitro. Shaking of culture, position of stem nodes used as explants and concentration of BAP (Benzyl Amino Purin) added to the culture medium were the factors investigated in this study. There was variation in leaves morphology of culture, however this variation did not occur after aclimatization and plant grown in the greenhouse. BAP decreased the level of chlorophyll content of leaves. In general, anatomical characters of leaves were not influenced by shaking, nodes position of stem and level of BAP.
Population Of Bacteria In Soil Dystrudepts Under Oil Palm In The Application Of Organic Mulch And Earthworm Juliarni Juliarni; Wawan Wawan; Delita Zul
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 3 No. 1 (2021): Volume 3 No.1 Januari 2021 Jurnal Agronomi Tanaman Tropika (JUATIKA)
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v3i1.415

Abstract

Research on the effect of organic mulch and earthworms under oil palm plantation on the total population bacteria is still scarce. The study aims to analyze the effect of organich mulch, earthworm desity, and the interaction between organich mulch and earthworm density on the total population bacteria. The research was carried out in May – August 2019. This research was a 3 x 4 factorial experiment which was placed according to a Split Plot Design with the basic design of Randomized Block Design, each treatment was repeated 3 times. Organic mulch as the main plot are 3 type, namely: M1 (M. bracteata), M2 (oil palm empty fruit brunches/ OPEFB) and M3 (oil palm midrib). The density of earthworms as subplots consists of 4 levels, namely: C0 (0 worms/m2), C1 (35 worms/m2), C2 (50 worms/m2) and C3 (65 worms/m2). The data were analyzed using analysis of variance. If the treatment is significantly different, the treatment was tested by Duncan’s at 5% significance level. The results showed that oil palm midrib organic mulch can increase the total population of fungi and bacteria compared to M. bracteata and OPFEB. The earthworms density 50 and 65 worms/m2 can increase the total bacterial population compared to other earthworm densities. The combination of oil palm midrib with earthworms density 50 and 65 worms/m2 can increase the total population of bacteria
Co-Authors Delita Zul Dorly Dorly Miftahudin . Nurlaela Nurlaela Nurlaela Nurlaela Roedhy Poerwanto SOEKISMAN TJITROSEMITO Tri Muji Ermayanti Wawan Wawan Yuli Andry