• 研究报告 •

### 基于根系分泌物研究混合型邻群环境对小麦幼苗亲缘识别的调控作用

1. (南京林业大学南方现代林业协同创新中心， 南京林业大学生物与环境学院， 南京 210037)
• 出版日期:2020-08-10 发布日期:2021-02-10

### Effects of neighborhood complexity on the responses of wheat seedlings to root exudates-mediated kin recognition.

WEI Jia-he, CHEN Bin*

1. (CoInnovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University; College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China).
• Online:2020-08-10 Published:2021-02-10

Abstract: To investigate the responses of wheat seedlings to kin recognition in a complex neighborhood composed by both kin and stranger individuals, we conducted an experiment with hydroponically growing two wheat cultivars exposed to root exudates which varied with three levels of relatedness (i.e. intra-cultivar, inter-cultivar and inter-species), and two levels of neighborhood complexity (i.e. all individuals from either the same level of relatedness or a mixture with half of them from intracultivar and the other half from inter-cultivar/specific). The results showed that both relatedness and neighborhood complexity significantly affected specific leaf area (SLA) and specific root length (SRL) of wheat seedlings, and they interactively affected SLA, total root length, SRL, and mean root diameter. These morphological trait values in the kinstranger-mixed neighborhood were either significantly higher/lower or unchanged, as compared to those in the pure kin neighborhood and pure stranger neighborhood. Furthermore, these kin recognition induced responses were cultivar-dependent. Our results suggest that the growth and competitive strategies of wheat in response to a relatedness-mixed neighborhood are not simply at the average status between pure kin and pure stranger neighborhoods.