JULIARNI JULIARNI
Departemen Biologi, Institut Pertanian Bogor

Published : 7 Documents
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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

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

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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
Paraphalaenopsis laycockii (M. R. Henderson) A. D. Hawkes: TINJAUAN TERHADAP MORFOLOGI TANAMAN DAN ANATOMI DAUN Yulia, Nina Dwi; Juliarni, Juliarni
Buletin Kebun Raya Vol 10, No 2 (2007): Buletin Kebun Raya Vol. 10 (2) Juli 2007
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Porophaloenopsis laycockii is an epiphytic orchid, endemic to Borneo. The orchid is not widely known since this orchid is rare and the trade of this species is restricted by the law. An observation was made to provide information on plant morphology and leaf anatomy of the species. Among various characters recorded, it was noted that the pencil-or-rat-tail-like leaf is about 5.66 mm in diameter and up to 1 m in length. It has relatively large stomata measuring 66.8 x 57.3 pm with low stomata density of 16.3 stomata per mm° of leaf surface area. These characters may influence its water management so that the plant should be grown and maintained in shade for better establishment.
Paraphalaenopsis laycockii (M. R. Henderson) A. D. Hawkes: TINJAUAN TERHADAP MORFOLOGI TANAMAN DAN ANATOMI DAUN Yulia, Nina Dwi; Juliarni, Juliarni
Buletin Kebun Raya Vol 10, No 2 (2007): Buletin Kebun Raya Indonesia Vol. 10 (2) July 2007
Publisher : Center for Plant Conservation Bogor Botanic Garden, Indonesian Institute of Sciences

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Abstract

Porophaloenopsis laycockii is an epiphytic orchid, endemic to Borneo. The orchid is not widely known since this orchid is rare and the trade of this species is restricted by the law. An observation was made to provide information on plant morphology and leaf anatomy of the species. Among various characters recorded, it was noted that the pencil-or-rat-tail-like leaf is about 5.66 mm in diameter and up to 1 m in length. It has relatively large stomata measuring 66.8 x 57.3 pm with low stomata density of 16.3 stomata per mm° of leaf surface area. These characters may influence its water management so that the plant should be grown and maintained in shade for better establishment.
LEAF ANATOMY CHARACTERS IN THE TAXONOMY OF PHALAENOPSIS AND ITS RELATIVES IN INDONESIA Yulia, Nina Dwi; Juliarni, Juliarni
Floribunda Vol 3, No 1-2 (2006)
Publisher : PTTI

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Abstract

Nina Dwi Yulia & Juliarni. 2006. Leaf Anatomy Characters in The Taxonomy of Phalaenopsis and its Relatives in Indonesia. Floribunda 3(2): 52-56.- Stomatal size, epiderm cell shape and structure and leaf thickness in Paraphalaenopsis, Doritis and Phalaenopsis are different. However, those characters are similar in Phalaenopsis and Kingidium.  Cladistic analysis of Phalaenopsis and its relatives using Hennig86 produced a cladogram with 10 steps and ended with the 3 closest genera, Doritis, Kingidium and Phalaenopsis.
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 | Original Source | Check in Google Scholar

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

Show Abstract | Original Source | Check in Google Scholar

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