Genetic diversity of PGPR Pseudomonas associated with rhizosphere of different crops cultivated in the saline agri-ecosystem
Increasing salinity due to extensive use of chemical fertilizer is an imperative threat in coastal, arid and semi-arid regions, and is also a major limiting factor for plant growth. Salinity is predicted to affect>50％ of all arable land by the year 2050. Use of PGPRs with biofertilizer and biopesticides traits suitable to the agriecosystem to promote Good Agriculture Practices (GAP) is the need of the hour. PGPR Pseudomonas are common inhabitants of the rhizospheres and are reported to exhibit many beneficial properties such as production of plant growth regulators like indoleacetic acid (IAA), gibberellic acid (GA) and cytokinins, nitrogen fixation, denitrification, solubilization of mineral phosphates and other nutrients, degradation of aromatic compounds, biosynthesis of polyhydroxybutyrate, protection against phytopathogenic microorganisms by production of siderophores, 2,4-diacetylphloroglucinol (2,4-DAPG), phenazines (Phz), pyrrolnitrin (Prn), pyoluteorin (Plt), surface-active antibiotics, biocides such as hydrogen cyanide and lytic enzymes. In addition Pseudomonads produce 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase which lowers the stress ethylene levels during biotic and abiotic stress and environmental stresses. With this background the genetic and functional diversity of the Pseudomonas associated with paddy, finger millet, pearl millet, pepper, cotton etc. capable of surviving in the saline conditions was extensively studied. It was interesting to note that the percentage of occurrence of P.
Pseudomonas PGPR salinity stress
Prabavathy V. R. Jegan, S. Ananthi Jeyaraman Sudha Nair
M. S. Swaminathan Research Foundation, 3rd Cross Road Taramani Institutional Area, Chennai 600113
国际会议
The 2nd Asian PGPR Conference(第二届亚洲植物促生根际细菌会议)
北京
英文
109-115
2011-08-21（万方平台首次上网日期，不代表论文的发表时间）