气候变化领域集成服务门户(CCPortal): Winter survival in red clover: experimental evidence for interactions among stresses

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DOI	10.1186/s12870-024-05167-5
	Winter survival in red clover: experimental evidence for interactions among stresses
	Ergon, Ashild; Amdahl, Helga
发表日期	2024
ISSN	1471-2229
起始页码	24
结束页码	1
卷号	24 期号:1
英文摘要	Background There is a lack of knowledge on the combined effects of different stresses on plants, in particular different stresses that occur during winter in temperate climates. Perennial herbaceous plants in temperate regions are exposed to many different stresses during winter, but except for the fact that cold temperatures induce resistance to a number of them, very little is known about their interaction effects. Knowledge about stress interactions is needed in order to predict effects of climate change on both agricultural production and natural ecosystems, and to develop adaptation strategies, e.g., through plant breeding. Here, we conducted a series of experiments under controlled conditions to study the interactions between cold (low positive temperature), clover rot infection (caused by Sclerotinia trifoliorum) and freezing, in red clover (Trifolium pratense) accessions. We also compared our results with winter survival in field experiments and studied associations between stress and shoot growth. Results Exposure to low positive temperatures (cold acclimation) induced resistance to clover rot. There was a clear negative interaction effect between freezing stress and clover rot infection, resulting in up to 37% lower survival rate compared to what would have been expected from the additive effect of freezing and infection alone. Freezing tolerance could continue to improve during incubation under artificial snow cover at 3 degrees C in spite of darkness, and we observed compensatory shoot growth following freezing after prolonged incubation. At the accession level, resistance to clover rot was negatively correlated with growth in the field during the previous year at a Norwegian location. It was also negatively correlated with the shoot regrowth of control plants after incubation. Clover rot resistance tests under controlled conditions showed limited correlation with clover rot resistance observed in the field, suggesting that they may reveal variation in more specific resistance mechanisms. Conclusions We here demonstrate, for the first time, a strong negative interaction between freezing and infection with a winter pathogen. We also characterize the effects of cold acclimation and incubation in darkness at different temperatures on winter stress tolerance, and present data that support the notion that annual cycles of growth and stress resistance are associated at the genetic level.
英文关键词	Clover rot; Cold acclimation; Freezing; Growth; Resistance; Sclerotinia trifoliorum; Stress interactions; Tolerance; Trifolium pratense
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001234542600003
来源期刊	BMC PLANT BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305525
作者单位	Norwegian University of Life Sciences
推荐引用方式 GB/T 7714	Ergon, Ashild,Amdahl, Helga. Winter survival in red clover: experimental evidence for interactions among stresses[J],2024,24(1).
APA	Ergon, Ashild,&Amdahl, Helga.(2024).Winter survival in red clover: experimental evidence for interactions among stresses.BMC PLANT BIOLOGY,24(1).
MLA	Ergon, Ashild,et al."Winter survival in red clover: experimental evidence for interactions among stresses".BMC PLANT BIOLOGY 24.1(2024).