The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform
R Panneerselvam - One of the best experts on this subject based on the ideXlab platform.
-
Pseudomonas fluorescens enhances biomass yield and ajmalicine production in catharanthus roseus under water deficit stress
Colloids and Surfaces B: Biointerfaces, 2007Co-Authors: Abdul C Jaleel, P Manivannan, B Sankar, A Kishorekumar, Ragupathi Gopi, R Somasundaram, R PanneerselvamAbstract:Abstract The effect of plant growth promoting rhizobacteria (PGPR) like Pseudomonas fluorescens on growth parameters and the production of ajmalicine were investigated in Catharanthus roseus under drought stress. The plants under pot culture were subjected to 10, 15 and 20 days interval drought (DID) stress and drought stress with Pseudomonas fluorescens at 1 mg l−1 and 1 mg l−1 Pseudomonas fluorescens alone from 30 days after planting (DAP) and regular irrigation was kept as control. The plants were uprooted on 41 DAS (10 DID), 46 DAS (15 DID) and 51 DAS (20 DID). Drought stress decreased the growth parameters and increased the ajmalicine content. But the treatment with Pseudomonas fluorescens enhanced the growth parameters under drought stress and partially ameliorated the drought induced growth inhibition by increasing the fresh and dry weights significantly. The ajmalicine content was again increased due to Pseudomonas fluorescens treatment to the drought stressed plants. From the results of this investigation, it can be concluded that, the seedling treatments of native PGPRs can be used as a good tool in the enhancement of biomass yield and alkaloid contents in medicinal plants, as it provides an eco-friendly approach and can be used as an agent in water deficit stress amelioration.
R Sivakamasundari - One of the best experts on this subject based on the ideXlab platform.
-
Studies on the Influence of Pseudomonas fluorescens and Chemicals on the Biocontrol Sheath Blight Incidence in Rice
International Journal of Pharmaceutical & Biological Archive, 2020Co-Authors: R SivakamasundariAbstract:Studies on the Influence of Pseudomonas fluorescens and Chemicals on the Biocontrol Sheath Blight Incidence in Rice
Stephen R Giddens - One of the best experts on this subject based on the ideXlab platform.
-
genome sequence of the biocontrol strain Pseudomonas fluorescens f113
Journal of Bacteriology, 2012Co-Authors: Miguel Redondonieto, Matthieu Barret, John P Morrisey, Kieran J Germaine, Francisco Martinezgranero, Emma Barahona, Ana Navazo, Maria Sanchezcontreras, Jennifer Moynihan, Stephen R GiddensAbstract:ABSTRACT Pseudomonas fluorescens F113 is a plant growth-promoting rhizobacterium (PGPR) that has biocontrol activity against fungal plant pathogens and is a model for rhizosphere colonization. Here, we present its complete genome sequence, which shows that besides a core genome very similar to those of other strains sequenced within this species, F113 possesses a wide array of genes encoding specialized functions for thriving in the rhizosphere and interacting with eukaryotic organisms.
Abdul C Jaleel - One of the best experts on this subject based on the ideXlab platform.
-
Pseudomonas fluorescens enhances biomass yield and ajmalicine production in catharanthus roseus under water deficit stress
Colloids and Surfaces B: Biointerfaces, 2007Co-Authors: Abdul C Jaleel, P Manivannan, B Sankar, A Kishorekumar, Ragupathi Gopi, R Somasundaram, R PanneerselvamAbstract:Abstract The effect of plant growth promoting rhizobacteria (PGPR) like Pseudomonas fluorescens on growth parameters and the production of ajmalicine were investigated in Catharanthus roseus under drought stress. The plants under pot culture were subjected to 10, 15 and 20 days interval drought (DID) stress and drought stress with Pseudomonas fluorescens at 1 mg l−1 and 1 mg l−1 Pseudomonas fluorescens alone from 30 days after planting (DAP) and regular irrigation was kept as control. The plants were uprooted on 41 DAS (10 DID), 46 DAS (15 DID) and 51 DAS (20 DID). Drought stress decreased the growth parameters and increased the ajmalicine content. But the treatment with Pseudomonas fluorescens enhanced the growth parameters under drought stress and partially ameliorated the drought induced growth inhibition by increasing the fresh and dry weights significantly. The ajmalicine content was again increased due to Pseudomonas fluorescens treatment to the drought stressed plants. From the results of this investigation, it can be concluded that, the seedling treatments of native PGPRs can be used as a good tool in the enhancement of biomass yield and alkaloid contents in medicinal plants, as it provides an eco-friendly approach and can be used as an agent in water deficit stress amelioration.
Jeanpierre Metraux - One of the best experts on this subject based on the ideXlab platform.
-
induced systemic resistance in arabidopsis thaliana in response to root inoculation with Pseudomonas fluorescens cha0
Molecular Plant-microbe Interactions, 2003Co-Authors: Annalisa Iavicoli, Emmanuel Boutet, A J Buchala, Jeanpierre MetrauxAbstract:Root inoculation of Arabidopsis thaliana ecotype Columbia with Pseudomonas fluorescens CHA0r partially protected leaves from the oomycete Peronospora parasitica. The molecular determinants of Pseudomonas fluorescens CHA0r for this induced systemic resistance (ISR) were investigated, using mutants derived from strain CHA0: CHA400 (pyoverdine deficient), CHA805 (exoprotease deficient), CHA77 (HCN deficient), CHA660 (pyoluteorin deficient), CHA631 (2,4-diacetylphloroglucinol [DAPG] deficient), and CHA89 (HCN, DAPG- and pyoluteorin deficient). Only mutations interfering with DAPG production led to a significant decrease in ISR to Peronospora parasitica. Thus, DAPG production in Pseudomonas fluorescens is required for the induction of ISR to Peronospora parasitica. DAPG is known for its antibiotic activity; however, our data indicate that one action of DAPG could be due to an effect on the physiology of the plant. DAPG at 10 to 100 µM applied to roots of Arabidopsis mimicked the ISR effect. CHA0r-mediated ISR was also tested in various Arabidopsis mutants and transgenic plants: NahG (transgenic line degrading salicylic acid [SA]), sid2-1 (nonproducing SA), npr1-1 (nonexpressing NPR1 protein), jar1-1 (insensitive to jasmonic acid and methyl jasmonic acid), ein2-1 (insensitive to ethylene), etr1-1 (insensitive to ethylene), eir1-1 (insensitive to ethylene in roots), and pad2-1 (phytoalexin deficient). Only jar1-1, eir1-1, and npr1-1 mutants were unable to undergo ISR. Sensitivity to jasmonic acid and functional NPR1 and EIR1 proteins were required for full expression of CHA0rmediated ISR. The requirements for ISR observed in this study in Peronospora parasitica induced by Pseudomonas fluorescens CHA0r only partially overlap with those published so far for Peronospora parasitica, indicating a great degree of flexibility in the molecular processes leading to ISR.
