气候变化领域集成服务门户(CCPortal): Heat stress during reproductive stages reduces camelina seed productivity and changes seed composition

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DOI	10.1016/j.heliyon.2024.e26678
	Heat stress during reproductive stages reduces camelina seed productivity and changes seed composition
	Smith, Brian E.; Lu, Chaofu
发表日期	2024
EISSN	2405-8440
起始页码	10
结束页码	4
卷号	10 期号:4
英文摘要	Camelina (Camelina sativa L. Crantz) is a low-input oilseed crop with great potential in bioenergy and industrial oils. Improving tolerance to high temperatures is essential for camelina agronomic sustainability. Two genotypes, Suneson and Pryzeth, were exposed to a transient 14-day heat stress at 37 C-degrees during the reproductive stages. Four cohorts of pods along the main stem, which were at different stages from fully developed pods (C1), young pods (C2), open flowers (C3) and flowering buds (C4) at the time of heat treatment, were examined for morphological and seed quality traits at maturity. The main stem length was shortened in both genotypes. Pods and seeds in all cohorts were negatively affected by heat, resulting in lower seed yield and reduced oil content. Seed size and seed weight had the greatest reduction in C1, pod size reduction was found the most in C3, and the number of fertile pods that contain at least one seed was reduced in C3 and C4. These results suggest that heat stress effects are developmental stage specific. Heat stress significantly reduced fertility during flowering and inhibited storage product biosynthesis and accumulation during seed filling which resulted in smaller and lighter seeds. Analyzing seed composition indicated that oil content decreased while protein content increased in seeds from heat treated plants. In addition, fatty acid composition was altered with the reduction of omega-3 alpha-linolenic acid and concomitantly increased omega-6 linoleic acid being the most significantly affected. Our results also revealed the different responses in the two genotypes examined, suggesting genetic variation in camelina germplasm which can be explored to improve heat tolerance. This study provides resources and guidance for future studies to understand genetic and physiological mechanisms of heat stress and to assist in improving the sustainability of camelina production facing climate change.
英文关键词	Camelina; Heat stress; Oil content; Fatty acid composition; Reproduction; Seed productivity
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001194075400001
来源期刊	HELIYON
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302253
作者单位	Montana State University System; Montana State University Bozeman
推荐引用方式 GB/T 7714	Smith, Brian E.,Lu, Chaofu. Heat stress during reproductive stages reduces camelina seed productivity and changes seed composition[J],2024,10(4).
APA	Smith, Brian E.,&Lu, Chaofu.(2024).Heat stress during reproductive stages reduces camelina seed productivity and changes seed composition.HELIYON,10(4).
MLA	Smith, Brian E.,et al."Heat stress during reproductive stages reduces camelina seed productivity and changes seed composition".HELIYON 10.4(2024).