Rhizosphere bacterial communities and soil nutrient conditions reveal sexual dimorphism of Populus deltoides  

作　　者：Qiliang Zhu Kun Yan Yufeng Dong Yanping Wang 

机构地区：[1]Taishan Forest Ecosystem Research Station of State Forestry Administration,College of Forestry,Shandong Agricultural University,Tai’an 271018,People’s Republic of China [2]Shandong Academy of Forest,Jinan 250014,People’s Republic of China

出　　处：《Journal of Forestry Research》2023年第3期761-771,共11页林业研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(32071751);the National key research and development program(2021YFD220120102);the Natural Science Foundation of Shandong Province(ZR2018ZC08N3);the funds of the Shandong Double Tops Program(Grant No.SYL2017XTTD03).

摘　　要：Sexual dimorphism of plants shapes the diff erent morphology and physiology between males and females.However,it is still unclear whether it infl uences belowground ecological processes.In this study,rhizosphere soil of male and female Populus deltoides and bulk soil were collected from an 18-year plantation(male and female trees mix-planted)and grouped into three soil compartments.Soil carbon(C),nitrogen(N)and phosphorus(P)levels were determined,and soil bacterial communities were analyzed by high-throughput sequencing.The results showed the less total carbon and total organic carbon,the more nutrients(available phosphorus,nitrate nitrogen and ammonium nitrogen)available in the rhizosphere soils of female poplars than soils of males.However,α-diversity indices of the rhizosphere bacterial communities under male plants were signifi-cantly higher.Principal component analysis showed that the bacterial communities were signifi cantly diff erent between the male and female soil compartments.Further,the bacterial co-occurrence network in soil under male trees had more nodes and edges than under females.BugBase analysis showed the more functional bacteria taxa related to biofi lm formation and antioxidation under males.The results indicate that soils under male poplars had more diverse and more complex co-occurrence networks of the rhizosphere bacterial community than soils under female trees,implying that male poplars might have better environmental adaptability.The study provides insight into the diff erent soil-microbe interactions of dioecious plants.More details about the infl uencing mechanism of sexual dimorphism on rhizosphere soil bacterial communities need to be further studied.

关 键 词：Dioecious poplar Rhizosphere bacterial community High-throughput sequencing Bacterial function prediction 

分 类 号：S792.11[农业科学—林木遗传育种]