Comprehensive identification, characterization and expression analysis of genes underpinning heat acclimatization in Triticum durum and Aegilops tauschii

Author:

Kumari Dipti1ORCID,Jain Alok1ORCID,Mukhopadhyay Kunal1ORCID

Affiliation:

1. Department of Bioengineering and Biotechnology Birla Institute of Technology Ranchi India

Abstract

AbstractWheat (Triticum aestivum L.) is an important cereal crop cultivated and consumed worldwide. Global warming‐induced escalation of temperature during the seedling and grain‐filling phase adversely affects productivity. To survive under elevated temperatures, most crop plants develop natural mechanisms at molecular level by activating heat shock proteins. However, other heat stress‐related proteins like heat acclimatization (HA) proteins are documented in hexaploid wheat but have not been explored in detail in its diploid and tetraploid progenitors, which might help to overcome elevated temperature regimes for short periods. Our study aims to explore the potential HA genes in progenitors Triticum durum and Aegilops tauschii that perform well at higher temperatures. Seven genes were identified and phylogenetically classified into three families: K homology (KH), Chloroplast protein‐enhancing stress tolerance (CEST), and heat‐stress‐associated 32 kDa (HSA32). Protein‐protein interaction network revealed partner proteins that aid mRNA translation, protein refolding, and reactive species detoxification. Syntenic analysis displayed highly conserved relationships. RT‐qPCR‐based expression profiling revealed HA genes to exhibit diverse and dynamic patterns under high‐temperature regimes, suggesting their critical role in providing tolerance to heat stress. The present study furnishes genetic landscape of HA genes that might help in developing climate‐resilient wheat with higher acclimatization potential.

Publisher

Wiley

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