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Interactive effects of low phosphorus and elevated CO2 on root exudation and nutrient uptake in wheat is modified under sulphur nutrition

Interactive effects of low phosphorus and elevated CO2 on root exudation and nutrient uptake in... We investigated the influence of elevated CO2 concentration (e[CO2]) on the interaction of phosphorus (P) and sulphur (S) on nutrient uptake efficiency of wheat. Experiments were conducted on wheat varieties PDW-233 (Triticum durum) and PBW-396 (T. aestivum) under different levels of [CO2] (400 and 700 ppm) with low P (5 µM), low S (10 µM) or low P/S and control (P 500 µM and S 2000 µM). Results revealed an increased biomass accumulation under e[CO2] with low P or S as compared to ambient CO2 concentration (a[CO2]). The root biomass was doubled with higher belowground dry matter partitioning under low nutrient and e[CO2]. Low P and S restricted plant growth directly by reduction in biomass accumulation and limited exudation of total carboxylates from root, however e[CO2] helped to overcome these deficiencies. Interactive effects of e[CO2] and low P or low P/S resulted in increased root length, surface area, volume and number of lateral roots. Under limited P and e[CO2], S provided stability to enzymes involved in root exudation and accelerated mobilization of P and its uptake efficiency. The activity of enzymes viz., phosphoenolpyruvate carboxylase, citrate synthase, malate dehydrogenase and pyruvate kinase, involved in carboxylate synthesis showed significant increase under e[CO2]. Further, the concentration of P and S increased under e[CO2] in shoot and root tissues of both varieties. Under limited P and S supply, e[CO2] helped in modification of root morphology and higher root exudation, which improved nutrient uptake in both varieties. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Indian Journal of Plant Physiology Springer Journals

Interactive effects of low phosphorus and elevated CO2 on root exudation and nutrient uptake in wheat is modified under sulphur nutrition

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References (35)

Publisher
Springer Journals
Copyright
Copyright © 2019 by Indian Society for Plant Physiology
Subject
Life Sciences; Plant Sciences; Plant Physiology; Plant Ecology; Plant Biochemistry; Cell Biology; Plant Genetics and Genomics
ISSN
0019-5502
eISSN
2662-2548
DOI
10.1007/s40502-019-0433-9
Publisher site
See Article on Publisher Site

Abstract

We investigated the influence of elevated CO2 concentration (e[CO2]) on the interaction of phosphorus (P) and sulphur (S) on nutrient uptake efficiency of wheat. Experiments were conducted on wheat varieties PDW-233 (Triticum durum) and PBW-396 (T. aestivum) under different levels of [CO2] (400 and 700 ppm) with low P (5 µM), low S (10 µM) or low P/S and control (P 500 µM and S 2000 µM). Results revealed an increased biomass accumulation under e[CO2] with low P or S as compared to ambient CO2 concentration (a[CO2]). The root biomass was doubled with higher belowground dry matter partitioning under low nutrient and e[CO2]. Low P and S restricted plant growth directly by reduction in biomass accumulation and limited exudation of total carboxylates from root, however e[CO2] helped to overcome these deficiencies. Interactive effects of e[CO2] and low P or low P/S resulted in increased root length, surface area, volume and number of lateral roots. Under limited P and e[CO2], S provided stability to enzymes involved in root exudation and accelerated mobilization of P and its uptake efficiency. The activity of enzymes viz., phosphoenolpyruvate carboxylase, citrate synthase, malate dehydrogenase and pyruvate kinase, involved in carboxylate synthesis showed significant increase under e[CO2]. Further, the concentration of P and S increased under e[CO2] in shoot and root tissues of both varieties. Under limited P and S supply, e[CO2] helped in modification of root morphology and higher root exudation, which improved nutrient uptake in both varieties.

Journal

Indian Journal of Plant PhysiologySpringer Journals

Published: Jan 17, 2019

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