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Transcript Analysis of Wheat WAS-2 Gene Family under High Temperature Stress during Ripening Period
Plant Breed. Biotech. 2018;6:363-380
Published online December 1, 2018
© 2018 Korean Society of Breeding Science.

Chan Seop Ko1, Jin-Baek Kim2, Min Jeong Hong2, Kyeong Hoon Kim3, Yong Weon Seo1,4*

1Department of Biosystems and Biotechnology, Korea University, Seoul 02841, Korea
2Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 56212, Korea
3Department of Southern Area Crop Science, National Institute of Crop Science, Miryang 42902, Korea
4Division of Biotechnology, Korea University, Seoul 02841, Korea
Correspondence to: Yong Weon Seo, seoag@korea.ac.kr, Tel: +82-2-3290-3005, Fax: +82-2-3290-3501
Received September 12, 2018; Revised October 6, 2018; Accepted October 8, 2018.
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Wheat is frequently exposed to high temperature during anthesis and ripening period, which resulted in yield loss and detrimental end-use-quality. The transcriptome analysis of wheat under high temperature stress during the early stage of the grain filling period was undertaken. Three expression patterns of differentially expressed genes (DEGs) during grain filling period were identified. The DEGs of seed storage protein and starch-branching enzyme showed continuous increases in their expressions during high temperature stress, as well as during the recovery period. The activities of the enzymes responsible for the elimination of antioxidants were significantly affected by exposure to high temperature stress. Only the WAS-2 family genes showed increased transcription levels under high temperature stress in dehulled spikelets. The relative transcription levels for sub-genome specific WAS-2 genes suggested that WAS-2 genes reacted with over-expression under high temperature stress and decreased back to normal expression during recovery. We propose the role of WAS-2 as a protective mechanism during the stage of grain development under high temperature in spikelets.
Keywords : Triticum aestivum, High temperature stress, Differentially expressed genes, Basic secretory protein, WAS-2


December 2018, 6 (4)
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