Greater chemical signaling in root exudates enhances soil mutualistic associations in invasive plants compared to natives
Greater chemical signaling in root exudates enhances soil mutualistic associations in invasive plants compared to natives
复制标题
根分泌物中更大的化学信号增强了入侵植物与本地植物的土壤互利关系
DOI：
10.1111/nph.18289
复制
发表时间：
2022-06-20
期刊：
影响因子：
9.4
通讯作者：
Ding，Jianqing
中科院分区：
文献类型：
--
作者：
Yu，Hongwei;He，Yingying;Ding，Jianqing
入侵植物可以改变土壤特性，从而促进生长。虽然入侵者已知会改变土壤化学成分，但根分泌的化学物质是否促进入侵的植物-土壤互惠作用尚不清楚。我们以19对入侵植物和本地植物为材料，探索了植物-丛枝菌根真菌互生关系在根分泌物诱导下的变化。我们发现，与本地植物相比，入侵者有更大的AM定殖率，更多的生物量，它们的根分泌物含有更高浓度的两种常见的化学信号--栎皮素和斯特里内酯--这两种已知刺激AM真菌生长和根部定植的化学信号。分泌物交换实验表明，入侵者的根分泌物比原生植物的分泌物更能促进AM的定植。然而，应用活性碳导致AM定殖率和植物生物量比本地入侵植物更大的减少，这表明入侵植物根分泌物中的化学信号具有更强的作用。我们表明，外来植物通过增强根分泌物化学物质促进了与土壤互惠生物的相互作用，这可能对入侵成功具有重要意义。
Invasive plants can change soil properties resulting in improved growth. Although invaders are known to alter soil chemistry, it remains unclear if chemicals secreted by roots facilitate invasive plant–soil mutualisms.With up to 19 confamilial pairs of invasive and native plants, and most of which were congeners, we explored the root exudate‐induced changes in plant–arbuscular mycorrhizal (AM) fungal mutualisms.We found that, relative to natives, invaders had greater AM colonization, greater biomass and their root exudates contained higher concentrations of two common chemical signals – quercetin and strigolactones – which are known to stimulate AM fungal growth and root colonization. An exudate exchange experiment showed that root exudates from invaders increased AM colonization more than exudates from natives. However, application of activated carbon led to greater reduction in AM colonization and plant biomass for invaders than natives, suggesting stronger effects of chemical signals in root exudates from invaders.We show that nonnative plants promote interactions with soil mutualists via enhancing root exudate chemicals, which could have important implications for invasion success.