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核桃丛枝菌根真菌多样性及其作用机制研究进展
徐永杰, 谭作枰, 吴强盛, 刘小青, 许晓宏
PDF(612 KB)
PDF(612 KB)
核桃丛枝菌根真菌多样性及其作用机制研究进展
Advances in Diversity of Arbuscular Mycorrhizal Fungi and Their Functional Mechanisms in Walnuts
核桃(Juglans)作为世界重要的经济林木,其生长发育与丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)之间密切关联。核桃根际AMF资源丰富,涵盖了10个属多个种,其多样性受种植模式(如套种)、土壤养分等影响,但深根性特征使核桃成为周围植被AMF繁殖体的储存库,并通过普通菌根网络实现了养分(如磷和碳)的有效再分配。该研究明确了AMF在促进核桃生长、提高成活率、促进养分(特别是磷)吸收,以及增强抗旱性方面的作用机制,并探究了AMF在提高和转移胡桃醌上的潜力。最后,对核桃菌根研究的未来发展方向进行了展望。
Walnut(Juglans) is an important economic forest tree species in the world, whose growth and development are associated with arbuscular mycorrhizal fungi(AMF). The rhizosphere of walnuts is rich in AMF populations, with multiple species in ten genera. Planting patterns(e.g., intercropping) and soil nutrients have an impact on AMF diversity in the walnut rhizosphere. However, deep-rooted walnut trees serve as a reservoir for AMF propagules, allowing for efficient nutrient(e.g., phosphorus and carbon) redistribution among surrounding plants through the common mycorrhizal network. This review elucidated the mechanisms by which AMF enhanced walnut growth and survival, promoted nutrient(particularly phosphorus) uptake, and increased drought tolerance. It also explored the potential of AMF in enhancing and transferring juglone, a key secondary metabolite in walnuts. The paper concluded with a perspective on the study of walnut mycorrhizae.
walnut / mycorrhiza / intercropping / common mycorrhizal network / juglone
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