Record ID No. |
985 |
Author(s) |
Begum,H.H., Osaki,M., Islam,M.T , 2005 |
Affiliation |
Winter Stress Laboratory, National Agricultural Research Station for Hokkaido Region, Toyohira-Ku, Sapporo 062-8555, Japan. |
Title |
Mechanisms of phosphorus nutrition in plants in tropical and sub-tropical soils - a review |
Source. Vol.(no):Page |
Journal-of-Agriculture-and-Rural-Development-Gazipur. 3(1/2): 1-8p. |
Categories |
Mycorrhiza General |
Subjects |
Reviews |
Host |
Plants |
Organism |
Mycorrhiza |
Country |
Japan, Asia |
Abstracts |
Phosphorus (P) is one of the 17 elements essential for plant growth. It is a limiting factor for crop yield for more than >30% of the world's arable land in tropical and sub-tropical regions of the world. Improvement of P acquisition and use by plants is critical for sustainable agricultural production and environmental reasons. Plants have evolved a diverse array of strategies to uptake adequate P under limiting conditions, including modifications to root architecture, carbon metabolism and membrane structure, exudation of low molecular weight organic acids, protons and enzymes, and enhanced expression of numerous genes involved in low-P adaptation. These adaptations seem to be less pronounced in mycorrhizal-associated plants as mycorrhiza in roots significantly helps plants in P uptake at low P soils. The formation of cluster roots under P-stress by the non-mycorrhizal plants and the accompanying biochemical changes exemplify many of the plant adaptations that enhance P acquisition and use. Identification of expressed sequence tags (ESTs) found in the genomic approaches under low-P stress may yield target sites for plant improvement. Interdisciplinary studies uniting plant breeding, biochemistry, soil science, and genetics under the large umbrella of genomics are a prerequisite for rapid progress in improving P acquisition and use in plants. |