干旱区生态环境知识资源中心(Arid): Balancing water and radiation productivity suggests a clue for improving yields in wheat under combined water deficit and terminal heat stress

Arid

DOI	10.3389/fpls.2023.1171479
	Balancing water and radiation productivity suggests a clue for improving yields in wheat under combined water deficit and terminal heat stress
	Dhakar, Rajkumar; Nagar, Shivani; Sehgal, Vinay Kumar; Jha, Prakash Kumar; Singh, Madan Pal; Chakraborty, Debasish; Mukherjee, Joydeep; Prasad, P. V. Vara
通讯作者	Dhakar, R ; Sehgal, VK
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2023
卷号	14
英文摘要	Sustaining crop yield under abiotic stresses with optimized resource use is a prerequisite for sustainable agriculture, especially in arid and semi-arid areas. Water and heat stress are major abiotic stresses impacting crop growth and yield by influencing complex physiological and biochemical processes during the life cycle of crops. In a 2-year (2015-2017) research, spring wheat cv. HD-2967 was grown under deficit irrigation and delayed sowing conditions to impose water and terminal heat stresses, respectively. The data were analyzed for seasonal crop water use, radiation interception, water productivity (WP), and radiation productivity (RP) under combined water deficit and terminal heat stresses. Seasonal crop water use was significantly affected by stresses in the order of water + terminal heat > water > terminal heat. Water stress showed minimal effect on the light extinction coefficient and consequently on seasonal intercepted photosynthetically active radiation (IPAR). However, seasonal IPAR was primarily affected by combined water + terminal heat and terminal heat stress alone. The slope of crop water use and IPAR, i.e., canopy conductance, an indicator of canopy stomatal conductance, was more influenced by water stress than by terminal heat stress. Results showed that linear proportionality between WP and RP is no longer valid under stress conditions, as it follows a curvilinear relation. This is further supported by the fact that independent productivity (either water or radiation) lacked the ability to explain variability in the final economic yield or biomass of wheat. However, the ratio of RP to WP explained the variability in wheat yield/biomass under individual or combined stresses. This suggests a clue for improving higher wheat yield under stress by managing WP and RP. The highest biomass or yield is realized when the ratio of RP to WP approaches unity. Screening of genotypes for traits leading to a higher ratio of RP to WP provides an opportunity for improving wheat productivity under stressed environments.
英文关键词	canopy conductance water use light interception water use efficiency radiation use efficiency
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000999649400001
WOS关键词	CARBON-ISOTOPE DISCRIMINATION ; HIGH-TEMPERATURE STRESS ; USE EFFICIENCY ; DROUGHT STRESS ; PHYSIOLOGICAL-RESPONSES ; GAS-EXCHANGE ; BREAD WHEAT ; LEAF-AREA ; TOLERANCE ; PHOTOSYNTHESIS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396597
推荐引用方式 GB/T 7714	Dhakar, Rajkumar,Nagar, Shivani,Sehgal, Vinay Kumar,et al. Balancing water and radiation productivity suggests a clue for improving yields in wheat under combined water deficit and terminal heat stress[J],2023,14.
APA	Dhakar, Rajkumar.,Nagar, Shivani.,Sehgal, Vinay Kumar.,Jha, Prakash Kumar.,Singh, Madan Pal.,...&Prasad, P. V. Vara.(2023).Balancing water and radiation productivity suggests a clue for improving yields in wheat under combined water deficit and terminal heat stress.FRONTIERS IN PLANT SCIENCE,14.
MLA	Dhakar, Rajkumar,et al."Balancing water and radiation productivity suggests a clue for improving yields in wheat under combined water deficit and terminal heat stress".FRONTIERS IN PLANT SCIENCE 14(2023).