Arbuscular mycorrhiza changes plant facilitation patterns and increases resource use efficiency in intercropped annual plants

文献类型： 外文期刊

第一作者： Zhu, Shuang-Guo

作者： Zhu, Shuang-Guo;Wang, Ren-Qing;Zhu, Shuang-Guo;Duan, Hai-Xia;Tao, Hong-Yan;Zhu, Li;Yang, Yu-Miao;Zhang, Xiao-Lin;Zhu, Hao;Zhang, Wei;Xiong, You-Cai;Zhou, Rui;Tao, Xiu-Ping;Xiong, You-Cai;Xiong, You-Cai

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关键词： Intercropping; Plant -plant interaction; Soil moisture; Phosphorus; AMF

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.8； 五年影响因子：5.1 ）

ISSN： 0929-1393

年卷期： 2023 年 191 卷

页码：

收录情况： SCI

摘要： Arbuscular mycorrhizal fungi (AMF) play a vital role in mediating rhizosphere interactions and plant growth, especially in resource-constrained soils. However, few studies have documented the effects of AMF on plant-plant interaction patterns and resource use efficiency along stress gradients. In this study, a growth environmentcontrolled experiment was carried out to evaluate the effects of AMF inoculation on maize-grass pea intercropping along three phosphorus (P) and two water gradients. The data indicated that soil water and P availability determined the plant interspecific interaction pattern, and that interaction was strongly mediated by AMF inoculation. Grass pea and maize were mutually facilitated under low P and water conditions and transitioned to a new pattern, i.e., that maize was facilitated but grass pea was neutral role or facilitator with increasing resource availability. The facilitative effect was particularly significant under P- and water-deficient conditions. Moreover, the transition of the plant-plant interaction pattern was mechanically driven by improving rhizospheric phosphatase activities by 5.08-20.02 %, rhizospheric acidification and enhanced microbial activities under resource deficit conditions. Critically, AMF inoculation was observed to significantly improve rhizospheric soil P availability and microbial biomass (p < 0.05); however, it enhanced the complementary utilization of P and water and weakened interspecific competition under high-resource conditions. Therefore, AMF inoculation positively transformed the plant-plant interaction pattern along resource gradients for higher P, nitrogen and water use efficiency. This study validates the context-dependent interspecific interaction and the role of AMF in optimizing resource use in a nutrient-impoverished intercropping system.

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