文献类型：期刊文献

英文题名：Mycorrhizal inoculation alters rhizosphere fungal community and root morphology to improve drought tolerance of resource-acquisitive but not resource-conservative Quercus species

作者：Xiang, Wang[1,2,3] Cheng, Xiangrong[1]

第一作者：Xiang, Wang

通信作者：Cheng, XR[1]

机构：[1]Chinese Acad Forestry, Inst Subtrop Forestry, East China Coastal Forest Ecosyst Res Stn, Hangzhou 311400, Zhejiang, Peoples R China;[2]Guangxi Zhuang Autonomous Reg Forestry Res Inst, Nanning 530002, Guangxi, Peoples R China;[3]Guangxi Nanning Eucalypt Plantat Ecosyst Observat, Nanning 530002, Guangxi, Peoples R China

年份：2024

卷号：202

外文期刊名：APPLIED SOIL ECOLOGY

收录：;Scopus(收录号：2-s2.0-85202064951);WOS:【SCI-EXPANDED(收录号:WOS:001306785700001)】；

基金：This study was supported by the Fundamental Research Funds of the Chinese Academy of Forestry (Grant No. CAFYBB2018ZB001-3) , Science Research Project of Baishanzu National Park (Grant No. 2021KFLY02) , and Key Project of City-School Cooperation Fund of Dongying City (Grant No. SXHZ-2023-02-9) . We would like to thank Dr. Zhilin Yuan, Zhiyong Zhu, and Long Peng for providing strains and insightful suggestions. Moreover, we thank Editage ( www.editage.cn) for English language editing.

语种：英文

外文关键词：Drought stress; Plant traits; Fungal community structure; Mycorrhizal fungi; Quercus species

摘要：The mutualistic association between mycorrhizal fungi and plants is well known to improve plant drought resistance. However, the influence of external inoculants on the interactions between soil microbial communities and plant functional traits and how these interactions improve plant drought tolerance under drought stress remain unclear. We conducted a pot inoculation experiment to assess the effect of two inoculated fungal strains ( Clitopolius hobsonii NL-19 and C. sp. HSL-YX-7-A) on morphological traits and rhizosphere fungal communities of eight Quercus species seedlings. Plant and soil fungal traits were measured 2 months after inoculation and then underwent a short-term (33 days) drought rewetting treatment. The biomass of all tree species reduced significantly under drought stress followed by rewetting (drought treatment) compared with that in the control treatment (well-watered); however, inoculated mycorrhizal fungi (drought + mycorrhizal inoculation treatment) increased the biomass of five Quercus species (growth-promoting species (GPS) exhibiting a significant increase in biomass under mycorrhizal inoculation treatment than under the uninoculated treatment during drought stress, characterized by a resource-use acquisitive strategy) and had no effect on the other three Quercus species (non-growth-promoting species (NGPS) exhibiting no significant difference in biomass between mycorrhizal inoculation and uninoculated treatments during drought stress, characterized by a resource-use conservative strategy). The leaf traits of the two species groups (GPS and NGPS) varied little among the three treatments. The values of most root traits (e.g., specific root length and root length) of GPS increased significantly under drought and drought + mycorrhizal inoculation treatments compared with those in the control, whereas relatively minor variations were observed in NGPS among the three treatments. The fungal community composition and functional groups (primary trophic modes) in the drought treatment were altered for NGPS but not for GPS; additionally, they changed in the drought + mycorrhizal inoculation treatment for GPS but not for NGPS when compared with those in the drought treatment. Furthermore, the drought tolerance of GPS was improved directly by fungal functional groups (i.e., Pathotroph-Saprotroph- Symbiotrophs proliferation) and indirectly by root traits (e.g., increased specific root length), whereas NGPS may adapt to drought stress through other pathways (e. g., physiological and biochemical regulation). Overall, drought and mycorrhizal inoculation affected the root traits and fungal community structure of Quercus seedlings, which rely on plant resource-use strategies. Our results provide new insights into the relationship between plant resource-use strategies and soil microbes for improving plant performance under drought stress.