Sex-related responses in rhizosphere processes of dioecious Populus cathayana exposed to drought and low phosphorus stress
Sex-related responses in rhizosphere processes of dioecious Populus cathayana exposed to drought and low phosphorus stress
复制标题
干旱和低磷胁迫下雌雄异株青杨根际过程的性别相关反应
DOI：
10.1016/j.envexpbot.2020.104049
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发表时间：
2020-07
影响因子：
5.7
通讯作者：
Li Chunyang
中科院分区：
文献类型：
--
作者：
Xia Zhichao;He Yue;Zhou Bin;Korpelainen Helena;Li Chunyang
广泛的研究表明，雌雄异株植物在极端环境下表现出性别二型性。然而，不同性别对干旱、磷(P)缺乏或两者结合反应的差异知之甚少。本研究以青杨为材料，研究了干旱、缺磷及其组合对青杨生长性能的影响。干旱和缺磷对雌性生长的负面影响大于对雄性生长的负面影响。施磷改善了干旱对雄株地上部分干物质积累和磷浓度的负面影响，但对雌株影响较小。在干旱配施磷条件下，雄株根际柠檬酸浓度高于充足水分条件下，且增加幅度大于雌株。雄性还表现出较高的土壤主要微生物类群，包括细菌、放线菌、丛枝菌根真菌(AMF)以及根际的革兰氏+和革兰氏菌，导致更具抗性的微生境。相反，在胁迫条件下，雌虫根际细菌和AMF的丰度较低，而腐生真菌的丰度显著增加。在相对严重的干旱胁迫下，抗旱性较强的雄株提高抗旱性较强，而雌株提高较少。与雌性相比，雄性的抗旱性增强可能与根际过程中更大的可塑性有关。
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 ofPopulus cathayanamales 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.
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影响因子：
--
作者：
L. Suriyagoda;M. Ryan;M. Renton;H. Lambers
通讯作者：
L. Suriyagoda;M. Ryan;M. Renton;H. Lambers
影响因子：
5.8
作者：
M. Kwapata;A. Hall
通讯作者：
M. Kwapata;A. Hall
DOI：
10.1038/ismej.2011.159
发表时间：
2012-05
期刊：
The ISME journal
影响因子：
--
作者：
通讯作者：
--
影响因子：
4.3
作者：
Qiangsheng Wu;R. Xia
通讯作者：
Qiangsheng Wu;R. Xia
云南杨对干旱和盐度相互作用的性别相关适应性反应
影响因子：
7.3
作者：
Chen, Lianghua;Zhang, Sheng;Li, Chunyang
通讯作者：
Li, Chunyang