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https://hdl.handle.net/2440/122723
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Type: | Journal article |
Title: | Genotypic performance of Australian durum under single and combined water-deficit and heat stress during reproduction |
Author: | Liu, H. Able, A.J. Able, J.A. |
Citation: | Scientific Reports, 2019; 9(1):14986-1-14986-17 |
Publisher: | Springer Nature |
Issue Date: | 2019 |
ISSN: | 2045-2322 2045-2322 |
Statement of Responsibility: | Haipei Liu, Amanda J. Able, Jason A. Able |
Abstract: | In Mediterranean environments, water deficiency and heat during reproduction severely limit cereal crop production. Our research investigated the effects of single and combined pre-anthesis water-deficit stress and post-anthesis heat stress in ten Australian durum genotypes, providing a systematic evaluation of stress response at the molecular, physiological, grain quality and yield level. We studied leaf physiological traits at different reproductive stages, evaluated the grain yield and quality, and the associations among them. We profiled the expression dynamics of two durum microRNAs and their protein-coding targets (auxin response factors and heat shock proteins) involved in stress adaptation. Chlorophyll content, stomatal conductance and leaf relative water content were mostly reduced under stress, however, subject to the time-point and genotype. The influence of stress on grain traits (e.g., protein content) also varied considerably among the genotypes. Significant positive correlations between the physiological traits and the yield components could be used to develop screening strategies for stress improvement in breeding. Different expression patterns of stress-responsive microRNAs and their targets in the most stress-tolerant and most stress-sensitive genotype provided some insight into the complex defense molecular networks in durum. Overall, genotypic performance observed indicates that different stress-coping strategies are deployed by varieties under various stresses. |
Keywords: | Triticum Plant Leaves Water Chlorophyll Heat-Shock Proteins Transcription Factors MicroRNAs Adaptation, Physiological Heat-Shock Response Reproduction Genotype Edible Grain Plant Breeding Crop Production |
Rights: | © The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
DOI: | 10.1038/s41598-019-49871-x |
Grant ID: | http://purl.org/au-research/grants/arc/DE180100784 |
Published version: | http://dx.doi.org/10.1038/s41598-019-49871-x |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 8 |
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File | Description | Size | Format | |
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hdl_122723.pdf | Published version | 8.35 MB | Adobe PDF | View/Open |
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