Common mycorrhizal networks benefit to the asymmetric interspecific facilitation via K exchange in an agricultural intercropping system
Common mycorrhizal networks benefit to the asymmetric interspecific facilitation via K exchange in an agricultural intercropping system
复制标题
农业间作系统中常见菌根网络通过钾交换有利于不对称种间促进
DOI：
10.1007/s00374-021-01561-5
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发表时间：
2021-07-13
影响因子：
6.5
通讯作者：
Wu, Fengzhi
中科院分区：
文献类型：
--
作者：
Gao, Danmei;Pan, Xinjie;Wu, Fengzhi
植物种间相互作用可受到共同菌根网络（CMNs）的影响，该网络介导养分交易（很少关注K和此类真菌利益），但涉及的机制尚不清楚。为了检验CMNs是否以及如何在种间相互作用中介导养分交易以使个体受益，本研究采用根排斥室和多室系统中的K-41标记方法研究了番茄/马铃薯洋葱系统的生长优势和K分布。间作提高了番茄的植株干重、菌丝和丛枝定殖根长率和钾含量，降低了马铃薯洋葱的钾含量。破坏CMNs降低了这种正向的种间相互作用对番茄生长和营养的影响，重建CMNs连接可以部分恢复这种正向作用。当马铃薯洋葱向番茄转移的K-41多于番茄向马铃薯洋葱转移的K-41时，植株间发生了强烈的不对称转移。
Plant interspecific interactions can be influenced by common mycorrhizal networks (CMNs), which mediate nutrient trade (rarely focused on K and such fungal benefits), but the involved mechanisms remain unclear. To test whether and how CMNs mediate nutrient trade to benefit individuals during interspecific interactions, the growth advantage and K distribution in tomato/potato-onion system were studied using root exclusion compartments and K-41 labeling in multi-compartment systems. Intercropping increased plant dry weight, percentage root length colonized by hyphae and arbuscules and K content of tomato, but decreased those of potato-onion. Damaging the CMNs decreased the effects of such positive interspecific interactions on growth and nutrition of tomato and re-established CMNs connection could partially recover the positive effects. A strong asymmetric transfer of K between plants occurred as potato-onion transferred more labeled K-41 to tomato than that transferred from tomato to potato-onion.