Sex-specific strategies of phosphorus (P) acquisition in Populus cathayana as affected by soil P availability and distribution

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http://hdl.handle.net/10138/311410

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Xia , Z , He , Y , Yu , L , Lv , R , Korpelainen , H & Li , C 2020 , ' Sex-specific strategies of phosphorus (P) acquisition in Populus cathayana as affected by soil P availability and distribution ' , New Phytologist , vol. 225 , no. 2 , pp. 782-792 . https://doi.org/10.1111/nph.16170

Title: Sex-specific strategies of phosphorus (P) acquisition in Populus cathayana as affected by soil P availability and distribution
Author: Xia, Zhichao; He, Yue; Yu, Lei; Lv, Rubing; Korpelainen, Helena; Li, Chunyang
Contributor: University of Helsinki, Department of Agricultural Sciences
Date: 2020-01
Language: eng
Number of pages: 11
Belongs to series: New Phytologist
ISSN: 0028-646X
URI: http://hdl.handle.net/10138/311410
Abstract: Soil phosphorus (P) availability and its distribution influence plant growth and productivity, but how they affect the growth dynamics and sex-specific P acquisition strategies of dioecious plant species is poorly understood. In this study, the impact of soil P availability and its distribution on dioecious Populus cathayana was characterized. P. cathayana males and females were grown under three levels of P supply, and with homogeneous or heterogeneous P distribution. Females had a greater total root length, specific root length (SRL), biomass and foliar P concentration under high P supply. Under P deficiency, males had a smaller root system than females but a greater exudation of soil acid phosphatase, and a higher colonization rate and arbuscular mycorrhizal hyphal biomass, suggesting a better capacity to mine P and a stronger association with arbuscular mycorrhizal fungi to forage P. Heterogeneous P distribution enhanced growth and root length density (RLD) in females. Female root proliferation in P-rich patches was related to increased foliar P assimilation. Localized P application for increasing P availability did not enhance the biomass accumulation and the morphological plasticity of roots in males, but it raised hyphal biomass. The findings herein indicate that sex-specific strategies in P acquisition relate to root morphology, root exudation and mycorrhizal symbioses, and they may contribute to sex-specific resource utilization patterns and niche segregation.
Subject: 415 Other agricultural sciences
11831 Plant biology
dioecy
heterogeneous phosphorus (P) supply
morphological plasticity of roots
mycorrhizal associations
P deficiency
rhizosphere processes
NUTRIENT FORAGING STRATEGIES
PHYSIOLOGICAL-RESPONSES
ARBUSCULAR MYCORRHIZA
DIOECIOUS PLANTS
ROOT MORPHOLOGY
ADAPTATION
NITROGEN
FEMALES
TRAITS
WATER
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