文献类型：期刊文献

英文题名：Intraspecific plant interaction affects arbuscular mycorrhizal fungal species richness

作者：Zhang, Qian[1] Koide, Roger T.[2] Liu, Junxiang[1] Li, Zhenjian[1] Sun, Zhenyuan[1] Sun, Qixiang[1] Yang, Haishui[3]

第一作者：张倩

通信作者：Yang, HS[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, 1 Dongxiaofu,Xiangshan Rd, Beijing 100091, Peoples R China;[2]Brigham Young Univ, Dept Biol, Provo, UT 84602 USA;[3]Nanjing Agr Univ, Coll Agr, 1 Weigang Rd, Nanjing 210095, Jiangsu, Peoples R China

年份：2022

卷号：470

期号：1-2

起止页码：141-152

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85105146048);WOS:【SCI-EXPANDED(收录号:WOS:000642387000003)】；

基金：This work was supported by the Central Public-interest Scientific Institution Basal Research Fund (CAFYBB2019QB001) and the Natural Science Foundation of China (No. 31870099).

语种：英文

外文关键词：Plant-soil interaction; Conspecific plant interaction; Mycorrhizal symbiosis; Root contacting; Shoot competition; AM fungal richness; Medicago sativa

摘要：Aims It is well established that mycorrhizal symbiosis can affect plant-plant interactions. On the other hand, how intraspecific plant interactions influence communities of arbuscular mycorrhizal fungi (AMF) is still very poorly understood. Methods We applied 454 pyrosequencing to determine the responses of AMF communities to intraspecific shoot and root interactions using Medicago sativa L. as host plant. Results We found that intraspecific plant interaction caused significant variation in the structure of the AMF community assessed from roots but not from soil. Intraspecific root system interaction resulted in significantly elevated AMF species richness, greater total mycorrhizal and arbuscular colonization, and a larger root:shoot ratio compared to plants experiencing intraspecific shoot interaction or no interaction. Intraspecific shoot interaction resulted in significantly depressed AMF species richness. Conclusions Our results support two hypotheses. The first is that increased AMF species richness in plants experiencing intraspecific root interaction originates from competitive release provided by high root density. The second is that shoot interaction leads to reduced allocation to root systems, increasing the stringency with which host plants selectively reward the most cooperative fungi. Because intraspecific interactions among host plants can influence the structure of their AMF community, interactions among species in complex plant communities may influence AMF community structure in addition to a plant diversity effect.