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	Root phenology in a changing climate
	Radville L.; Mccormack, M. L.; Post, E.; Eissenstat, D. M.
	2016
关键词	Belowground endogenous exogenous phenology root dynamics root growth below-ground phenology northern hardwood forests fine roots elevated co2 shoot growth carbon allocation soil-temperature plant phenology growing-season aboveground phenology
英文摘要	Plant phenology is one of the strongest indicators of ecological responses to climate change, and altered phenology can have pronounced effects on net primary production, species composition in local communities, greenhouse gas fluxes, and ecosystem processes. Although many studies have shown that aboveground plant phenology advances with warmer temperatures, demonstration of a comparable association for belowground phenology has been lacking because the factors that influence root phenology are poorly understood. Because roots can constitute a large fraction of plant biomass, and root phenology may not respond to warming in the same way as shoots, this represents an important knowledge gap in our understanding of how climate change will influence phenology and plant performance. We review studies of root phenology and provide suggestions to direct future research. Only 29% of examined studies approached root phenology quantitatively, strongly limiting interpretation of results across studies. Therefore, we suggest that researchers emphasize quantitative analyses in future phenological studies. We suggest that root initiation, peak growth, and root cessation may be under different controls. Root initiation and cessation may be more constrained by soil temperature and the timing of carbon availability, whereas the timing of peak root growth may represent trade-offs among competing plant sinks. Roots probably do not experience winter dormancy in the same way as shoots: 89% of the studies that examined winter phenology found evidence of growth during winter months. More research is needed to observe root phenology, and future studies should be careful to capture winter and early season phenology. This should be done quantitatively, with direct observations of root growth utilizing rhizotrons or minirhizotrons.
出处	Journal of Experimental Botany
卷	67
期	12
页	3617-3628
语种	英语
ISSN号	0022-0957
DOI标识	10.1093/jxb/erw062
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43178]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Radville L.,Mccormack, M. L.,Post, E.,et al. Root phenology in a changing climate. 2016.

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