Juvenile heat stress tolerance in Triticum durum—Aegilops tauschii derived synthetics: a way forward for wheat improvement

Kaur, A and Grewal, S K and Kaur, S and Sharma, A and Srivastava, P and Garg, M and Wani, S H and Chhuneja, P and Singh, K and Kaur, S (2022) Juvenile heat stress tolerance in Triticum durum—Aegilops tauschii derived synthetics: a way forward for wheat improvement. Molecular Biology Reports, 49. pp. 5669-5683. ISSN 1573-4978

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Abstract

Background Exponentially increasing population and everchanging climatic conditions are two major concerns for global food security. Early sowing in the second fortnight of October is an emerging trend with farmers in Indo Gangetic Plains to avoid yield losses from terminal heat stress. This also benefits the use of residual soil moisture of rice crop, conserving about one irrigation. But most of the available wheat cultivars are not well adapted to early-season sowing. Methods and results Two in-house developed SHWs, syn14128 and syn14170, were screened for juvenile heat stress. Seedling length, biochemical parameters, and expression of amylase gene immediately after heat shock (HS) of 45 °C for 12 h and 20 h, and 24 h indicated significantly lower malondialdehyde, hydrogen peroxide, and higher free radical scavenging activities. Syn14170 reported higher total soluble sugar (TSS) under both HS periods, while syn14128 had a sustainable TSS content and amylase activity under HS as well as the recovery period. Conclusions Both the SHWs had lower oxidative damage along with high free radical scavenging under heat stress. The higher expression of amy4 along with sustainable TSS after heat stress in syn14128 indicated it as a potential source of juvenile heat stress tolerance. Variable response of SHWs to different biochemical parameters under heat stress opens future perspectives to explore the enzymatic pathways underlying these responses.

Item Type:	Article
Divisions:	Genebank
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Synthetic wheat, ROS, MDA, Seedling, Heat stress tolerance, Amylase
Subjects:	Others > Wheat
Depositing User:	Mr Nagaraju T
Date Deposited:	12 Mar 2024 10:30
Last Modified:	12 Mar 2024 10:30
URI:	http://oar.icrisat.org/id/eprint/12569
Official URL:	https://link.springer.com/article/10.1007/s11033-0...
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	Funding received from the Department of Biotechnology, New Delhi, India in the form of project no. BT/IN/Indo-UK/CGAT/16/SK/2014-15 is highly acknowledged.
Links:	Google Scholar

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