气候变化领域集成服务门户(CCPortal): Impacts of elevated temperature and vapour pressure deficit on leaf gas exchange and plant growth across six tropical rainforest tree species

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DOI	10.1111/nph.19822
	Impacts of elevated temperature and vapour pressure deficit on leaf gas exchange and plant growth across six tropical rainforest tree species
	Middleby, Kali B.; Cheesman, Alexander W.; Cernusak, Lucas A.
发表日期	2024
ISSN	0028-646X
EISSN	1469-8137
英文摘要	Elevated air temperature (Tair) and vapour pressure deficit (VPDair) significantly influence plant functioning, yet their relative impacts are difficult to disentangle. We examined the effects of elevated Tair (+6 degrees C) and VPDair (+0.7 kPa) on the growth and physiology of six tropical tree species. Saplings were grown under well-watered conditions in climate-controlled glasshouses for 6 months under three treatments: (1) low Tair and low VPDair, (2) high Tair and low VPDair, and (3) high Tair and high VPDair. To assess acclimation, physiological parameters were measured at a set temperature. Warm-grown plants grown under elevated VPDair had significantly reduced stomatal conductance and increased instantaneous water use efficiency compared to plants grown under low VPDair. Photosynthetic biochemistry and thermal tolerance (Tcrit) were unaffected by VPDair, but elevated Tair caused Jmax25 to decrease and Tcrit to increase. Sapling biomass accumulation for all species responded positively to an increase in Tair, but elevated VPDair limited growth. This study shows that stomatal limitation caused by even moderate increases in VPDair can decrease productivity and growth rates in tropical species independently from Tair and has important implications for modelling the impacts of climate change on tropical forests.
英文关键词	acclimation; leaf temperature; photosynthesis; stomatal conductance; tropical forest; vapour pressure deficit; warming
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001224563800001
来源期刊	NEW PHYTOLOGIST
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/295104
作者单位	James Cook University
推荐引用方式 GB/T 7714	Middleby, Kali B.,Cheesman, Alexander W.,Cernusak, Lucas A.. Impacts of elevated temperature and vapour pressure deficit on leaf gas exchange and plant growth across six tropical rainforest tree species[J],2024.
APA	Middleby, Kali B.,Cheesman, Alexander W.,&Cernusak, Lucas A..(2024).Impacts of elevated temperature and vapour pressure deficit on leaf gas exchange and plant growth across six tropical rainforest tree species.NEW PHYTOLOGIST.
MLA	Middleby, Kali B.,et al."Impacts of elevated temperature and vapour pressure deficit on leaf gas exchange and plant growth across six tropical rainforest tree species".NEW PHYTOLOGIST (2024).