Microenvironment and microbial community in the rhizosphere of dioecious Populus cathayana at Chaka Salt Lake
Microenvironment and microbial community in the rhizosphere of dioecious Populus cathayana at Chaka Salt Lake
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茶卡盐湖雌雄异株青杨根际微环境及微生物群落
DOI：
10.1007/s11368-019-02263-0
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发表时间：
2019-02
影响因子：
3.6
通讯作者：
Tang Ming
中科院分区：
文献类型：
--
作者：
Wu Na;Li Zhen;Wu Fei;Tang Ming
目的性别效应可引起根际微生物群落组成和土壤性质的显著变化。虽然雌雄异株植物分布广泛，但对雌雄异株植物根际微环境差异的研究却知之甚少。材料与方法本研究通过下一代测序和非盐碱地区青杨雌雄株根际土壤性质的评价来表征微生物物种（对照地点），盐湖边（低盐），盐山（中盐）、盐厂结果与讨论在青杨根际共观察到真菌5门18纲57目108科211属，而在青杨根际共观察到真菌18门，在青杨根际共观察到细菌35纲69目149科329属。随着盐渍化程度的增加，青杨根际微生物群落多样性呈现先增加后减少的趋势，其中真菌群落的多样性最强。立地和性别对微生物群落结构有显著影响，引起群落结构的调整。土壤速效钾、铵态氮（NH_4-N）、和硝酸盐氮（NO3-N）以及Na+和Cl−含量和电导率（EC）是影响茶卡盐湖生态系统青杨根际微生物群落的主要因素不同盐度的青杨植株。此外，两性之间存在微生物群落偏好的潜在差异。
PurposeSex effects may cause significant changes in rhizosphere microbial community composition and soil properties. Although dioecious plants are widespread, little is known about rhizosphere microenvironmental differences in response to dioecious plants.Materials and methodsThis study characterized microbial species by next-generation sequencing and evaluation of soil properties in the rhizosphere of male and female Populus cathayana plants located in non-saline area (control site), salt lakeside (low salt), salt mountain (middle salt), and salt factory (high salt) areas.Results and discussionA total of 5 phyla, 18 classes, 57 orders, 108 families, and 211 genera of fungi were observed in the rhizosphere of P. cathayana, while 18 phyla, 35 classes, 69 orders, 149 families, and 329 genera of bacteria were observed in the rhizosphere of P. cathayana. With increasing salinization, the microbial community diversity in the rhizosphere of P. cathayana first increased and then decreased, especially in the fungal community. Site and sex had significant effects on microbial communities and caused adjustments in microbial community structure. Redundancy analysis (RDA) showed that available K, ammonium nitrogen (NH4-N), and nitrate nitrogen (NO3-N) as well as Na+ and Cl− contents and the electrical conductivity (EC) were the main factors affecting the microbial community in the rhizosphere of P. cathayana in the Chaka Salt Lake ecosystem.ConclusionsThis is the first study focusing on microbial communities and soil properties in the rhizosphere of male and female P. cathayana plants with different degrees of salinity. In addition, potential differences in the preferences of the microbial communities between the two sexes exist.
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