Elevated temperature differently affects growth, photosynthetic capacity, nutrient absorption and leaf ultrastructure of Abies faxoniana and Picea purpurea under intra- and interspecific competition

Show full item record



Permalink

http://hdl.handle.net/10138/307908

Citation

Yu , L , Song , M , Xia , Z , Korpelainen , H , Niinemets , U & Li , C 2019 , ' Elevated temperature differently affects growth, photosynthetic capacity, nutrient absorption and leaf ultrastructure of Abies faxoniana and Picea purpurea under intra- and interspecific competition ' , Tree Physiology , vol. 39 , no. 8 , pp. 1342-1357 . https://doi.org/10.1093/treephys/tpz044

Title: Elevated temperature differently affects growth, photosynthetic capacity, nutrient absorption and leaf ultrastructure of Abies faxoniana and Picea purpurea under intra- and interspecific competition
Author: Yu, Lei; Song, Mengya; Xia, Zhichao; Korpelainen, Helena; Niinemets, Ulo; Li, Chunyang
Contributor: University of Helsinki, Department of Agricultural Sciences
Date: 2019-08
Language: eng
Number of pages: 16
Belongs to series: Tree Physiology
ISSN: 0829-318X
URI: http://hdl.handle.net/10138/307908
Abstract: There is a limited understanding of the impacts of global warming on intra- and interspecific plant competition. Resolving this knowledge gap is important for predicting the potential influence of global warming on forests, particularly on high-altitude trees, which are more sensitive to warming. In the present study, effects of intra- and interspecific competition on plant growth and associated physiological, structural and chemical traits were investigated in Abies faxoniana and Picea purpurea seedlings under control (ambient temperature) and elevated temperature (ET, 2 degrees C above ambient temperature) conditions for 2 years. We found that A. faxoniana and P. purpurea grown under intra- and interspecific competition showed significant differences in dry matter accumulation (DMA), photosynthetic capacity, nutrient absorption, nonstructural carbohydrate (NSC) contents and leaf ultrastructure under ET conditions. ET increased leaf, stem and root DMA of both conifers under both competition patterns. Moreover, under ET and interspecific competition, P. purpurea had overall superior competitive capacity characterized by higher organ (leaf, stem and root) and total DMA, height growth rate, net photosynthetic rate, specific leaf area, water use efficiency (delta C-13), leaf and root N and NSC concentrations and greater plasticity for absorption of different soil N forms. Thus, the growth of P. purpurea benefitted from the presence of A. faxoniana under ET. Our results demonstrated that ET significantly affects the asymmetric competition patterns in subalpine conifer species. Potential alteration of plant competitive interactions by global warming can influence the composition, structure and functioning of subalpine coniferous forests.
Subject: conifer species
elevated temperature
plant-plant competition
subalpine coniferous forests
WATER-USE EFFICIENCY
POPULUS-CATHAYANA
PLANT-GROWTH
PHYSIOLOGICAL-RESPONSES
CARBON ASSIMILATION
NITROGEN DEPOSITION
SEXUAL COMPETITION
PRIMARY SUCCESSION
DRY MASS
CO2
1183 Plant biology, microbiology, virology
1182 Biochemistry, cell and molecular biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Yu_et_al_2019_E ... hysiology_39_1342_1357.pdf 3.912Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record