气候变化领域集成服务门户(CCPortal): High freezing sensitivity of legumes relative to other herbaceous species in northern temperate plant communities

CCPortal

DOI	10.1093/aob/mcae072
	High freezing sensitivity of legumes relative to other herbaceous species in northern temperate plant communities
	Rycroft, Samuel L.; Henry, Hugh A. L.
发表日期	2024
ISSN	0305-7364
EISSN	1095-8290
英文摘要	Background and Aims Reduced snow cover and increased air temperature variability are predicted to expose overwintering herbaceous plants to more severe freezing in some northern temperate regions. Legumes are a key functional group that may exhibit lower freezing tolerance than other species in these regions, but this trend has been observed only for non-native legumes. Our aim was to confirm if this trend is restricted to non-native legumes or whether native legumes in these regions also exhibit low freezing tolerance.Methods First, we transplanted legumes (five non-native species and four native species) into either an old field (non-native) or a prairie (native) and used snow removal to expose the plots to increased soil freezing. Second, we grew plants in mesocosms (old field) and pots (prairie species) and exposed them in controlled environment chambers to a range of freezing treatments (control, 0, -5 or -10 degrees C) in winter or spring. We assessed freezing responses by comparing differences in biomass, cover and nodulation between freezing (or snow removal) treatments and controls.Key Results Among legume species, lower freezing tolerance was positively correlated with a lower proportion of nodulated plants and active nodules, and under controlled conditions, freezing-induced reductions in above-ground biomass were lower on average in native legumes than in non-native legumes. Nevertheless, both non-native and native legumes (except Desmodium canadense) exhibited greater reductions in biomass in response to increased freezing than their non-leguminous neighbours, both in controlled environments and in the field.Conclusions These results demonstrate that both native and non-native legumes exhibit low freezing tolerance relative to other herbaceous species in northern temperate plant communities. By reducing legume biomass and nodulation, increased soil freezing could reduce nitrogen inputs into these systems.
英文关键词	Fabaceae; frost; nitrogen fixers; snow removal; winter
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001229131800001
来源期刊	ANNALS OF BOTANY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302461
作者单位	Western University (University of Western Ontario)
推荐引用方式 GB/T 7714	Rycroft, Samuel L.,Henry, Hugh A. L.. High freezing sensitivity of legumes relative to other herbaceous species in northern temperate plant communities[J],2024.
APA	Rycroft, Samuel L.,&Henry, Hugh A. L..(2024).High freezing sensitivity of legumes relative to other herbaceous species in northern temperate plant communities.ANNALS OF BOTANY.
MLA	Rycroft, Samuel L.,et al."High freezing sensitivity of legumes relative to other herbaceous species in northern temperate plant communities".ANNALS OF BOTANY (2024).