نتایج جستجو برای: aphanidermatum pythium
تعداد نتایج: 1540 فیلتر نتایج به سال:
Abstract The present work focusses on development of a safe, inexpensive, and more accessible source for biosynthesis silver nanoparticles. Four different in-house probiotic isolates, i.e., Lactobacillus pentosus S6, plantarum F22, crustorum F11, paraplantarum KM1 isolated from food sources, were used in the current study to check their ability synthesize All probiotic-synthesized nanoparticles...
به منظور تعیین عوامل پوسیدگی طوقه و ریشه گوجه فرنگی در شهرستان مرودشت طی دو فصل زراعی 89-88 از مزارع گوجه فرنگی مناطق حومه شهر مرودشت نمونه برداری به عمل آمد. قطعاتی از بین بافت های سالم و پوسیده ریشه وطوقه بعد از ضد عفونی سطحی، روی محیط های غذایی اسیدی و غیر اسیدی عصاره سیب زمینی آگار کشت گردید. از کشت نمونه ها 80 جدایه متعلق به 17 گونه جدا گردید. بر اساس آزمون های بیماری زایی، گونه های ، Pyt...
BACKGROUND Ecologically meaningful classification of bacterial populations is essential for understanding the structure and function of bacterial communities. As in soils, the ecological strategy of the majority of root-colonizing bacteria is mostly unknown. Among those are Massilia (Oxalobacteraceae), a major group of rhizosphere and root colonizing bacteria of many plant species. METHODOLOG...
Although plant diseases can be caused by bacteria, viruses, and protists, most are caused by fungi and fungus-like oomycetes. Intensive use of fungicides with the same mode of action can lead to selection of resistant strains increasing the risk of unmanageable epidemics. In spite of the integrated use of nonchemical plant disease management strategies, agricultural productivity relies heavily ...
The molecular fingerprinting technique (PCR-DGGE) of microbial populations was successfully adopted for soilless culture systems. Relatively low concentrations of microorganisms in the nutrient solutions could be assessed. PCR-DGGE was applied in several experiments to compare the composition and diversity of the bacterial populations in different treatments, as well as at different locations a...
Alpha-dioxygenase (a-DOX) enzymes catalyse the oxygenationof fatty acids to yield anewly identifiedgroupof oxylipins that play a role in protecting tissues from oxidative damage and cell death. In tomato (Lycopersicon esculentum Mill.) a-DOX was identified as saltregulated by differential display of mRNA, and is represented by a small gene family comprising at least three members: LEa-DOX1, -2,...
تنش شوری یکی از مهمترین فاکتورهای غیرزیستی است که میزان رشد و محصولدهی را در بسیاری از گیاهان محدود مینماید. شوری به علت تأثیر سوء روی گیاه میزبان باعث افزایش حساسیت میزبان، وقوع و توسعه بیماریهای گیاهی میشود. قارچ ریشهها قادرند که تحمل شوری برخی گیاهان را افزایش دهند. در این تحقیق تأثیر بیولوژیکی قارچ Glomus mosseae در کنترل بیماری بوتهمیری خیار با عامل Pythium aphanidermatum مورد مطال...
Eicosatetraenoic acid (ETA, 20:4, ω-3) is the desaturation product of dihomo-gamma linolenic (DGLA, 20:3, ω-6) catalyzed by delta-17 desaturase, which considered as a healthy that helps to lower risk heart diseases. The oleaginous filamentous fungus, Mucor circinelloides, has been used for long time model micro-organism GLA production at industrial scales. However, M. circinelloides lacks key e...
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