文献类型： 外文期刊
作者： Sun, Yan 1 ; Yan, Lin 1 ; Zhang, Ang 1 ; Yang, Jianfeng 1 ; Zhao, Qingyun 1 ; Lin, Xingjun 1 ; Zhang, Zixiao 1 ; Huang, Lifang 1 ; Wang, Xiao 1 ; Wang, Xiaoyang 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Spice & Beverage Res Inst, Wanning 571533, Peoples R China
2.Chinese Acad Trop Agr Sci, Spice & Beverage Res Inst, Hainan Prov Key Lab Genet Improvement & Qual Regul, Wanning 571533, Peoples R China
3.Chinese Acad Trop Agr Sci, Spice & Beverage Res Inst, Key Lab Genet Resource Utilizat Spice & Beverage C, Minist Agr & Rural Affairs, Wanning 571533, Peoples R China
关键词： grafting; root exudates; rhizosphere microbial structure; microbial function; coffee species
期刊名称：AGRICULTURE-BASEL （ 影响因子：3.6； 五年影响因子：3.8 ）
ISSN：
年卷期： 2024 年 14 卷 10 期
页码：
收录情况： SCI
摘要： Heterologous double-root grafting represents an effective strategy to mitigate challenges associated with continuous coffee cropping and reduce soil-borne diseases. However, its specific regulatory mechanism remains unclear. Therefore, a field experiment was conducted including six different grafting combinations for C. canephora cv. Robusta (Robusta) and Coffea Liberica (Liberica): Robusta scion with a homologous double root (R/RR), Liberica scion with a homologous double root (L/LL), Robusta scion with a heterologous double root (R/RL and L/RL), and Liberica scion with a heterologous double root (L/LR and R/LR); these combinations were conducted to clarify the effects of heterologous double-root grafting combinations on the root exudates and soil microbial diversity, structure, and function of Robusta and Liberica. The results demonstrated notable differences in root exudates, rhizosphere microbial structure, and function between Robusta and Liberica. Despite Liberica having lower diversity in its rhizosphere microbial communities and relatively higher levels of potential pathogenic bacteria, it showed stronger resistance to diseases. Roots of Robusta in heterologous double-root coffee seedlings significantly enhanced the secretion of resistance compounds, increased the relative abundance of potentially beneficial bacteria, and reduced the relative abundance of potential pathogenic fungi. This enhances the rhizosphere immunity of Robusta against soil-borne diseases. The results indicated that grafting onto Liberica roots can strengthen resistance mechanisms and enhance the rhizosphere immunity of Robusta, thereby mitigating challenges associated with continuous cropping.
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