نتایج جستجو برای: dapg

تعداد نتایج: 96  

ژورنال: :کنترل بیولوژیک آفات و بیماری های گیاهی 2012
مسعود احمدزاده سلیمان قاسمی

سودوموناس‏های فلورسنت از مهمترین عوامل کنترل بیولوژیک بیماری‏های گیاهی هستند که به­صورت مستقیم، با تولید و ترشح متابولیت های بازدارنده و سیدروفورها، سبب محدودکردن یا توقف رشد بیمارگر‏های گیاهی به­ویژه قارچ ها می‏شوند و برخی با تولید هورمون­های مختلف سبب افزایش رشد گیاه می‏شوند. هدف از این پژوهش معرفی و بررسی برخی خصوصیات استرین‏ جدید  p. fluorescen utpf68است که از منطقه ریزوسفر گیاه کلزا مزارع ...

2015
Jegan Sekar

 It is one of the most nutritious millet and staple food in different states of India and Pseudomonas sp. MSSRFD41  MSSRFD41 was isolated from finger millet rhizosphere soil samples. 16S rRNA gene sequence shows maximum 98.77% similarity and forms monophyletic clade with closely related species.  It produces 2,4-DAPG, HCN, AHLs, IAA, solubilises phosphate and tolerates 1 M NaCl.  Exhibits p...

2017
Nina G Schmidt Tea Pavkov-Keller Nina Richter Birgit Wiltschi Karl Gruber Wolfgang Kroutil

The Friedel-Crafts acylation is commonly used for the synthesis of aryl ketones, and a biocatalytic version, which may benefit from the chemo- and regioselectivity of enzymes, has not yet been introduced. Described here is a bacterial acyltransferase which can catalyze Friedel-Crafts C-acylation of phenolic substrates in buffer without the need of CoA-activated reagents. Conversions reach up to...

2017
Rhitu Rai Prasanta K Dash Payal Gupta

Tomato (Solanum lycopersicum) is a common vegetable crop with worldwide consumption of its edible fruit. Bacterial wilt in tomato causes substantial yield loss. Biological control using microbial agents such as rhizobacteria has gained considerable attention over the last decade. In this study, we isolated a bacterial strain, RS-9 from the rhizosphere of a healthy tomato plant in a bacterial wi...

Journal: :Phytopathology 2007
Dorith Rotenberg Raghavendra Joshi Maria-Soledad Benitez Laura Gutierrez Chapin Amara Camp Clara Zumpetta Adam Osborne Warren A Dick Brian B McSpadden Gardener

ABSTRACT Analyses of multiple field experiments indicated that the incidence and relative abundance of root-colonizing phlD+ Pseudomonas spp. were influenced by crop rotation, tillage, organic amendments, and chemical seed treatments in subtle but reproducible ways. In no-till corn plots, 2-year rotations with soybean resulted in plants with approximately twofold fewer phlD+ pseudomonads per gr...

Journal: :Journal of nematology 2009
Patricia Timper Daouda Koné Jingfang Yin Pingsheng Ji Brian B McSpadden Gardener

The antibiotic 2,4-diacetylphloroglucinol (DAPG), produced by some strains of Pseudomonas spp., is involved in suppression of several fungal root pathogens as well as plant-parasitic nematodes. The primary objective of this study was to determine whether Wood1R, a D-genotype strain of DAPG-producing P. fluorescens, suppresses numbers of both sedentary and migratory plant-parasitic nematodes. An...

Journal: :Applied and environmental microbiology 2010
Joana Beatrice Meyer Matthias Peter Lutz Michele Frapolli Maria Péchy-Tarr Laurène Rochat Christoph Keel Geneviève Défago Monika Maurhofer

There is a significant potential to improve the plant-beneficial effects of root-colonizing pseudomonads by breeding wheat genotypes with a greater capacity to sustain interactions with these bacteria. However, the interaction between pseudomonads and crop plants at the cultivar level, as well as the conditions which favor the accumulation of beneficial microorganisms in the wheat rhizosphere, ...

Journal: :Applied and environmental microbiology 2003
M Viebahn D C M Glandorf T W M Ouwens E Smit P Leeflang K Wernars L S Thomashow L C van Loon P A H M Bakker

To investigate the impact of genetically modified, antibiotic-producing rhizobacteria on the indigenous microbial community, Pseudomonas putida WCS358r and two transgenic derivatives were introduced as a seed coating into the rhizosphere of wheat in two consecutive years (1999 and 2000) in the same field plots. The two genetically modified microorganisms (GMMs), WCS358r::phz and WCS358r::phl, c...

سودوموناس‌های فلورسنت مولد 2و4-دی­استیل فلوروگلوسینول(DAPG)  در بیوکنترل بسیاری بیماری‌های قارچی گیاهان نقش دارند. پژمردگی فوزاریومی گوجه­فرنگی یکی از مهمترین بیماری‌های این گیاه است که خسارت زیادی را به محصول وارد می­آورد. در این پژوهش 35 سویه Pseudomonas fluorescens از نظر وجود ژن‌های phlD و hcnAB بررسی شده و مشخص گردید نه سویه واجد ژن‌های بیوکنترل بودند. توانایی آنتاگونیستی سویه­های واجد دو ...

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