Investigating the influence of elevated temperature on nutritional and yield characteristics of mung bean (Vigna radiata L.) genotypes during seed filling in a controlled environment

Frontiers in Plant Science

Plant Science

Kamal Dev Sharma¹  P. V. Vara Prasad²  Anjali Bhardwaj³  Manu Priya³  Harsh Nayyar³  Bindumadhava HanumanthaRao⁴  Uday Chand Jha⁵  Kadambot H.M. Siddique⁶ 

[1] Department of Agricultural Biotechnology, Chaudhary Sarwan Kumar (CSK) Himachal Pradesh Agricultural University, Palampur, India;Department of Agronomy and Sustainable Intensification Innovation Lab, Kansas State University, Manhattan, KS, United States;Department of Botany, Panjab University, Chandigarh, India;Dr. Marri Channa Reddy Foundation, Hyderabad, Telangana, India;ICAR-Indian Institute of Pulses Research, Kanpur, India;Department of Agronomy and Sustainable Intensification Innovation Lab, Kansas State University, Manhattan, KS, United States;The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia;

关键词: heat stress;    legumes;    pulses;    grains;    seed quality;    proteins;    yield;   

DOI  :  10.3389/fpls.2023.1233954

 received in 2023-06-05, accepted in 2023-08-30,  发布年份 2023

来源: Frontiers

【 摘 要 】

Rising temperatures impact different developmental stages of summer crops like mung bean, particularly during the crucial seed-filling stage. This study focused on two mung bean genotypes, categorized as heat-tolerant [HT] or heat-sensitive [HS]. These genotypes were grown in pots in an outdoor natural environment (average day/night temperature 36°C/24.3°C) until the onset of podding (40 days after sowing) and subsequently relocated to controlled-environment walk-in growth chambers for exposure to heat stress (42°C/30°C) or control conditions (35°C/25°C) until maturity. For all measured attributes, heat stress had a more pronounced effect on the HS genotype than on the HT genotype. Heat-stressed plants exhibited severe leaf damage, including membrane damage, reduced chlorophyll content, diminished chlorophyll fluorescence, and decreased leaf water content. Heat stress impeded the seed-filling rate and duration, decreasing starch, protein, fat, and mineral contents, with a notable decline in storage proteins. Heat stress disrupted the activities of several seed enzymes, inhibiting starch and sucrose accumulation and consequently decreasing individual seed weights and seed weight plant−1. This study revealed that heat stress during seed filling severely impaired mung bean seed yield and nutritional quality due to its impact on various stress-related traits in leaves and enzyme activities in seeds. Moreover, this research identified potential mechanisms related to heat tolerance in genotypes with contrasting heat sensitivity.

【 授权许可】

Unknown   
Copyright © 2023 Priya, Bhardwaj, Jha, HanumanthaRao, Prasad, Sharma, Siddique and Nayyar