Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Phosphorus acquisition from deficient soil: involvement of organic acids and acid phosphatase in pigeon pea (Cajanus cajan L. mills sp)

Phosphorus acquisition from deficient soil: involvement of organic acids and acid phosphatase in... Plants adopt several strategies to acquire phosphorus (P) under P deficient conditions. Exudation of organic acids and synthesis of certain enzymes involved in the solubilization of bound P in the soil are among the important strategies. We investigated the involvement of organic acids and acid phosphatase in acquiring P under deficient conditions. In our earlier experiments we classified Pigeon pea genotypes, as high and low P uptake types based on root dry weight and P content of the leaves. Here we report that the root exudates of high P uptake genotypes had higher organic acids, indicated by higher P solubilization capacity of these genotypes. Further, the acid phosphatase activity was also higher in these genotypes under P deficient conditions compared to low P uptake types. There was an inverse relationship between root P content, P solubilisation capacity and root acid phosphatase activity. Differences in P uptake are attributed to root characteristics and altered plant metabolism to cope with P stress. We also report here a novel technique for the measurement of root surface area using nitrite assay method. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Indian Journal of Plant Physiology Springer Journals

Phosphorus acquisition from deficient soil: involvement of organic acids and acid phosphatase in pigeon pea (Cajanus cajan L. mills sp)

Loading next page...
 
/lp/springer-journals/phosphorus-acquisition-from-deficient-soil-involvement-of-organic-mbzye30D6I

References (40)

Publisher
Springer Journals
Copyright
Copyright © 2014 by Indian Society for Plant Physiology
Subject
Life Sciences; Plant Sciences; Plant Physiology; Plant Ecology; Plant Biochemistry; Cell Biology; Plant Genetics & Genomics
ISSN
0019-5502
eISSN
0974-0252
DOI
10.1007/s40502-014-0101-z
Publisher site
See Article on Publisher Site

Abstract

Plants adopt several strategies to acquire phosphorus (P) under P deficient conditions. Exudation of organic acids and synthesis of certain enzymes involved in the solubilization of bound P in the soil are among the important strategies. We investigated the involvement of organic acids and acid phosphatase in acquiring P under deficient conditions. In our earlier experiments we classified Pigeon pea genotypes, as high and low P uptake types based on root dry weight and P content of the leaves. Here we report that the root exudates of high P uptake genotypes had higher organic acids, indicated by higher P solubilization capacity of these genotypes. Further, the acid phosphatase activity was also higher in these genotypes under P deficient conditions compared to low P uptake types. There was an inverse relationship between root P content, P solubilisation capacity and root acid phosphatase activity. Differences in P uptake are attributed to root characteristics and altered plant metabolism to cope with P stress. We also report here a novel technique for the measurement of root surface area using nitrite assay method.

Journal

Indian Journal of Plant PhysiologySpringer Journals

Published: Aug 12, 2014

There are no references for this article.