Sex-related responses in rhizosphere processes of dioecious Populus cathayana exposed to drought and low phosphorus stress

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Xia , Z , He , Y , Zhou , B , Korpelainen , H & Li , C 2020 , ' Sex-related responses in rhizosphere processes of dioecious Populus cathayana exposed to drought and low phosphorus stress ' , Environmental and Experimental Botany , vol. 175 , 104049 . https://doi.org/10.1016/j.envexpbot.2020.104049

Title: Sex-related responses in rhizosphere processes of dioecious Populus cathayana exposed to drought and low phosphorus stress
Author: Xia, Zhichao; He, Yue; Zhou, Bin; Korpelainen, Helena; Li, Chunyang
Contributor organization: Department of Agricultural Sciences
Viikki Plant Science Centre (ViPS)
Population Genetics and Biodiversity Group
Plant Production Sciences
Date: 2020-07
Language: eng
Number of pages: 10
Belongs to series: Environmental and Experimental Botany
ISSN: 0098-8472
DOI: https://doi.org/10.1016/j.envexpbot.2020.104049
URI: http://hdl.handle.net/10138/328686
Abstract: Extensive research has shown that dioecious plants exhibit sexual dimorphism under extreme environments. However, sex-specific differences in responses to drought, phosphorus (P) shortage or their combination are less known. In our study, impacts of drought, P shortage and their combination on the performance of Populus cathayana males and females were investigated. Drought and P deficiency caused a greater negative impact on female growth than on male growth. P application ameliorated the more negative effect of drought on the shoot dry matter accumulation and P concentration in male leaves, while smaller effects were observed in females. The concentration of citrate in the rhizosphere of males was higher under drought combined with P application than under adequate water availability, and the increase was greater in males than in females. Males also showed a higher abundance of main soil microbial groups, including bacteria, actinomycetes, arbuscular mycorrhizal fungi (AMF), and Gram+ and Gram- bacteria in the rhizosphere, resulting in a more resistant microhabitat. In contrast, the abundance of bacteria and AMF was less in the rhizosphere of females exposed to stress conditions, while saprophytic fungi increased significantly. P enhanced drought resistance more in stress-resistant males but less in females under relatively severe drought stress. Increased drought resistance by P in males might be associated with greater plasticity in rhizosphere processes when compared with females.
Subject: 4111 Agronomy
P shortage
drought
rhizosphere processes
main soil microbial groups
carbohydrates
sexual dimorphism
Carbohydrates
ROOT EXUDATION
PLANT
ADAPTIVE RESPONSES
Main soil microbial groups
PHYSIOLOGICAL-RESPONSES
MOISTURE
CHINESE FIR
Rhizosphere processes
AVAILABILITY
GROWTH
SOIL BACTERIAL
Sexual dimorphism
Drought
WATER
11831 Plant biology
11832 Microbiology and virology
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion


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