Stay-green trait ameliorates combined heat and drought stress in wheat

RAJEEV KUMAR; HARIKRISHNA HARIKRISHNA; OM P GHIMIRE; DIPANKAR BARMAN; VISWANATHAN CHINNUSAMY; PRADEEP K SINGH; JASDEEP C PADARIA; ARCHNA SUMAN; AJAY ARORA

doi:10.56093/ijas.v91i4.112682

Authors

RAJEEV KUMAR ICAR-Indian Institute of Vegetable Research, Varanasi
HARIKRISHNA HARIKRISHNA ICAR-Indian Agricultural Research Insititute, New Delhi 110 012, India
OM P GHIMIRE ICAR-Indian Agricultural Research Insititute, New Delhi 110 012, India
DIPANKAR BARMAN ICAR-Indian Agricultural Research Insititute, New Delhi 110 012, India
VISWANATHAN CHINNUSAMY ICAR-Indian Agricultural Research Insititute, New Delhi 110 012, India
PRADEEP K SINGH ICAR-Indian Agricultural Research Insititute, New Delhi 110 012, India
JASDEEP C PADARIA ICAR-Indian Agricultural Research Insititute, New Delhi 110 012, India
ARCHNA SUMAN ICAR-Indian Agricultural Research Insititute, New Delhi 110 012, India
AJAY ARORA ICAR-Indian Agricultural Research Insititute, New Delhi 110 012, India

https://doi.org/10.56093/ijas.v91i4.112682

Keywords:

Combined stress, Flag leaves, Stay-green, Wheat, Yield

Abstract

The present study was carried out during rabi 2017-18 at ICAR-Indian Agricultural Research Institute, New Delhi to investigate the effect of stay-green trait on grain yield in wheat under combined heat and drought stress. Two high stay green (GCP 6 and GCP 33) and two low stay green (GCP 23 and GCP 30) Recombinant Inbred Lines (RILs) of wheat along with their parents (HI1500/DBW43) were grown in field conditions under timely sown with irrigation (control) and without irrigation (drought stress), and late sown with irrigation (heat stress) and without irrigation (combined heat and drought stress). High stay-green RILs showed the reduced levels of abscisic acid and ethylene production during anthesis stage under heat, drought and combined stress conditions as compared to low stay green RILs. Furthermore, there was significantly better yield was observed in high stay-green RILs as compared to low stay-green RILs. Thus our study concludes that stay-green traits improve the yield in wheat under combined heat and drought stress condition by delaying the senescence through reduced levels of abscisic acid and ethylene.

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