Differential response of hexaploid and tetraploid wheat to interactive effects of elevated [CO2] and low phosphorus

Differential response of hexaploid and tetraploid wheat to interactive effects of elevated [CO2]... Key message Hexaploid wheat is more responsive than tetraploid to the interactive effects of elevated [CO ] and low P in terms of carboxylate efflux, enzyme activity and gene expression (TaPT1 and TaPAP). Abstract Availability of mineral nutrients to plants under changing climate has become a serious challenge to food security and economic development. An understanding of how elevated [CO ] influences phosphorus (P) acquisition processes at the whole-plant level would be critical in selecting cultivars as well as to maintain optimum yield in limited-P conditions. Wheat (Triticum aestivum and T. durum) grown hydroponically with sufficient and low P concentration were exposed to elevated and ambient [CO ]. Improved dry matter partitioning towards root resulted in increased root-to-shoot ratio, root length, volume, surface area, root hair length and density at elevated [C O ] with low P. Interaction of low P and [C O ] induced 2 2 activity of enzymes (phosphoenolpyruvate carboxylase, malate dehydrogenase and citrate synthase) in root tissue resulting in twofold increase in carboxylates and acid phosphatase exudation. Physiological absorption capacity of roots showed that plants alter their uptake kinetics by increasing affinity (low K ) in response to elevated [C O ] under low P http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Cell Reports Springer Journals

Differential response of hexaploid and tetraploid wheat to interactive effects of elevated [CO2] and low phosphorus

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Life Sciences; Plant Sciences; Cell Biology; Biotechnology; Plant Biochemistry
ISSN
0721-7714
eISSN
1432-203X
D.O.I.
10.1007/s00299-018-2307-4
Publisher site
See Article on Publisher Site

Abstract

Key message Hexaploid wheat is more responsive than tetraploid to the interactive effects of elevated [CO ] and low P in terms of carboxylate efflux, enzyme activity and gene expression (TaPT1 and TaPAP). Abstract Availability of mineral nutrients to plants under changing climate has become a serious challenge to food security and economic development. An understanding of how elevated [CO ] influences phosphorus (P) acquisition processes at the whole-plant level would be critical in selecting cultivars as well as to maintain optimum yield in limited-P conditions. Wheat (Triticum aestivum and T. durum) grown hydroponically with sufficient and low P concentration were exposed to elevated and ambient [CO ]. Improved dry matter partitioning towards root resulted in increased root-to-shoot ratio, root length, volume, surface area, root hair length and density at elevated [C O ] with low P. Interaction of low P and [C O ] induced 2 2 activity of enzymes (phosphoenolpyruvate carboxylase, malate dehydrogenase and citrate synthase) in root tissue resulting in twofold increase in carboxylates and acid phosphatase exudation. Physiological absorption capacity of roots showed that plants alter their uptake kinetics by increasing affinity (low K ) in response to elevated [C O ] under low P

Journal

Plant Cell ReportsSpringer Journals

Published: Jun 4, 2018

References

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