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Type: Journal article
Title: Effects of drought stress on pollen sterility, grain yield, abscisic acid and protective enzymes in two winter wheat cultivars
Author: Dong, B.
Zheng, X.
Liu, H.
Able, J.
Yang, H.
Zhao, H.
Zhang, M.
Qiao, Y.
Wang, Y.
Liu, M.
Citation: Frontiers in Plant Science, 2017; 8:1008-1-1008-14
Publisher: Frontiers Media SA
Issue Date: 2017
ISSN: 1664-462X
Statement of
Baodi Dong, Xin Zheng, Haipei Liu, Jason A. Able, Hong Yang, Huan Zhao, Mingming Zhang, Yunzhou Qiao, Yakai Wang and Mengyu Liu
Abstract: Drought stress induced pollen sterility is a detrimental factor reducing grain number in wheat. Exploring the mechanisms underlying pollen fertility under drought conditions could assist breeding high-yielding wheat cultivars with stress tolerance. Here, by using two Chinese wheat cultivars subjected to different levels of polyethylene glycol (PEG)-induced drought stress, possible links between pollen fertility and stress tolerance were analyzed under different levels of drought stress at the young microspore stage. In both cultivars, higher grain number reduction was observed under condition of lower water availability. Overall, the drought tolerant cultivar (Jinmai47) exhibited less grain number reduction than the drought sensitive cultivar (Shiluan02-1) under all stress conditions. Compared with Shiluan02-1, Jinmai47 exhibited superior physiological performance in terms of leaf photosynthetic rate, ear carbohydrate accumulation, pollen sink strength, pollen development and fertility under stress. Moreover, Jinmai47 showed a lower increase in endogenous abscisic acid in ears than Shiluan02-1. Furthermore, higher levels of superoxide dismutase (SOD) and peroxidase (POD) activities were also found in the drought tolerant cultivar Jinmai47 under PEG stress, compared with the drought sensitive cultivar Shiluan02-1. Changes in these physiological traits could contribute to better pollen development and male fertility, ultimately leading to the maintenance of grain number under drought stress.
Keywords: Drought stress response; wheat; pollen sterility; antioxidant enzyme; abscisic acid
Rights: Copyright © 2017 Dong, Zheng, Liu, Able, Yang, Zhao, Zhang, Qiao, Wang and Liu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
DOI: 10.3389/fpls.2017.01008
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Appears in Collections:Agriculture, Food and Wine publications
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