Elevated temperature and CO2 interactively modulate sexual competition and ecophysiological responses of dioecious Populus cathayana

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Chen , J , Liu , Q , Yu , L , Korpelainen , H , Niinemets , U & Li , C 2021 , ' Elevated temperature and CO2 interactively modulate sexual competition and ecophysiological responses of dioecious Populus cathayana ' , Forest Ecology and Management , vol. 481 , 118747 . https://doi.org/10.1016/j.foreco.2020.118747

Title: Elevated temperature and CO2 interactively modulate sexual competition and ecophysiological responses of dioecious Populus cathayana
Author: Chen, Juan; Liu, Quan; Yu, Lei; Korpelainen, Helena; Niinemets, Ulo; Li, Chunyang
Contributor organization: Viikki Plant Science Centre (ViPS)
Department of Agricultural Sciences
Population Genetics and Biodiversity Group
Plant Production Sciences
Date: 2021-02-01
Language: eng
Number of pages: 13
Belongs to series: Forest Ecology and Management
ISSN: 0378-1127
DOI: https://doi.org/10.1016/j.foreco.2020.118747
URI: http://hdl.handle.net/10138/339509
Abstract: It remains unclear how global climate change affects dioecious plants that may be especially vulnerable to climate drivers, because they often exhibit skewed sex ratios and eco-physiological specialization in certain microhabitats. In this study, female and male saplings of Populus cathayana were employed to explore sex-specific responses and the effects of sexual competition under elevated temperature (ET), elevated CO2 (EC) and combination of elevated temperature and CO2 (ETC). The results demonstrated that elevated temperature and CO2 interactively modulated sexual competition and responses of P. cathayana. Moreover, competition patterns affected the eco-physiological responses of P. cathayana to climate change treatments. Under both intra- and inter-sexual competition, biomass components, photosynthetic parameters and carbon-related metabolites of females were most strongly affected by ET, while males exhibited a higher photosynthesis and resource use efficiency, and a better biomass accumulation and carbon balance mechanism when compared to females when experiencing intra-sexual competition under EC. The competitive pressure of females on males in inter-sexual competition was intensified by ET, while it was alleviated by ETC. We conclude that climate change drivers and competition patterns differently regulate the sex-specific responses and competitive intensity of males and females, which may have a crucial effect on sex ratios, spatial sexual segregation, biomass production and carbon sequestration in dioecious species in the future.
Subject: Nitrogen use efficiency
Sexual competition
Climate change
Non-structural carbohydrates
Structural carbohydrates
Photosynthetic capacity
CARBON-ISOTOPE DISCRIMINATION
PHYSIOLOGICAL-RESPONSES
SPATIAL SEGREGATION
CLIMATE-CHANGE
DROUGHT
PLANTS
FACILITATION
GENDER
AVAILABILITY
DIMORPHISM
4112 Forestry
1181 Ecology, evolutionary biology
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion


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