agr8(4)_agronomy0800044.pdf 7.95 MB
Kamal, Nasrein Mohamed Arid Land Research Center, Tottori University / Biotechnology and Biosafety Research Center, Agricultural Research Corporation
Gorafi, Yasir Serag Alnor Arid Land Research Center, Tottori University / Biotechnology and Biosafety Research Center, Agricultural Research Corporation
Mega, Ryosuke Arid Land Research Center, Tottori University
carbon isotope composition
Post-anthesis drought stress is one of the main constraints on the production of wheat (Triticum aestivum L.). Because field screening for post-anthesis drought tolerance is difficult, effective and validated methods to simulate drought in order to identify sources of tolerance can facilitate screening of breeding materials. Chemical desiccants are widely used to simulate post-anthesis drought stress. We aimed to identify physiological traits that respond to desiccants as they do to drought. We examined the responses of ‘Norin 61’ to six treatments in a greenhouse: irrigated control, drought after anthesis, and 2% or 4% potassium chlorate (KClO3) at anthesis (A) or grain filling (GF). We measured δ13C in leaves, aboveground fresh biomass, stomatal conductance, chlorophyll content, harvest index, and grain yield. Both 2% and 4% KClO3 at both A and GF simulated the effect of drought stress. Selection of drought-tolerant genotypes can be aided by chlorophyll content and δ13C measurement of leaves when 2% or 4% KClO3 is used to simulate drought.
(C) 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Kamal Nasrein Mohamed, Gorafi Yasir Serag Alnor, Mega Ryosuke, et al. Physiological Response of Wheat to Chemical Desiccants Used to Simulate Post-Anthesis Drought Stress. AGRONOMY-BASEL. 2018. 8(4). doi:10.3390/agronomy8040044
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