Pseudomonas fluorescens are gram‐negative, motile, rod‐shaped bacteria known for their metabolic versatility. Many strains of this species possess excellent capability to colonize plant roots, promoting plant growth in soils contaminated with toxic metals. P. fluorescens biotype F is a strain tolerant to arsenic which had been isolated previously f...
Chapitre 5
Some selected microorganisms isolated from rhizosphere of crops, were screened for their abilities to enhance crop growth and suppress plant parasitic nematodes; in screenhouse experiments. Two promising hybrids of soybean genotypes: TGx 1448-2E (medium duration) and TGx 1485-1D (early maturing) and a high yielding hybrid of maize genotype Oba Supe...
Induced disease resistance is the phenomenon by which plants exhibit a heightened level of resistance against pathogen infection after appropriate stimulation. In contrast to the relative wealth of information on inducible resistance responses in dicotyledoneous plants, our current understanding of the molecular machinery governing induced resistan...
Published in The Journal of Microbiology
The effect of genetically modified (GM) Brassica rapa subsp. pekinensis (Chinese cabbage) expressing Bt toxin gene (cry1AC) to the rhizosphere bacterial community was examined using the denaturing gradient gel electrophoresis (DGGE) fingerprinting method. From the visual comparison of the DGGE profiles, there were no significant differences between...
Published in Plant signaling & behavior
Accumulating evidence indicates that plant growth promoting rhizobacteria (PGPR) influence plant growth and development by the production of phytohormones such as auxins, gibberellins, and cytokinins. Little is known on the genetic basis and signal transduction components that mediate the beneficial effects of PGPRs in plants. We recently reported ...
2009
Published in Plant signaling & behavior
We obtained 61 rhizobacterium isolates from rhizosphere soil samples collected in melon commercial fields located in Mossoró, Rio Grande do Norte State, Brazil. These isolates, along with 56 endophytic bacteria from the Collection of Cultures of the Plant Bacteriology Laboratory of the Universidade Federal Rural de Pernambuco, were tested for contr...
En Nouvelle-Calédonie, les sols développés sur roches ultramafiques (5.500 km2) sont constitués à plus de 65% d'oxy-hydroxyde de fer, ils présentent des teneurs très faibles en azote et en phosphore (1/10 à 1/100 des teneurs moyennes), de surcroît ils sont déséquilibrés pour le rapport Ca/Mg et contiennent des concentrations très élevées en métaux ...
