Increasing flavonoid concentrations in root exudates enhance associations between arbuscular mycorrhizal fungi and an invasive plant.
Increasing flavonoid concentrations in root exudates enhance associations between arbuscular mycorrhizal fungi and an invasive plant.
复制标题
DOI：
10.1038/s41396-021-00894-1
复制
发表时间：
2021-07
期刊：
影响因子：
--
通讯作者：
Siemann E
中科院分区：
文献类型：
--
作者：
Tian B;Pei Y;Huang W;Ding J;Siemann E
许多入侵植物增强了互利的丛枝菌根（AM）真菌协会，然而，AM真菌协会之间的引进和本地种群的入侵植物的潜在差异的机制还没有被探讨。在这里，我们测试的假设，根分泌物的化学物质在入侵种群的变化影响AM真菌定植，然后影响植物的性能。我们研究了黄酮类化合物（槲皮素和槲皮苷）的根分泌物的本地和引进人口的入侵植物黑根，并测试其对AM真菌和植物性能的影响。我们发现，植物从引进种群有较高浓度的槲皮素的根分泌物，更大的AM真菌定殖和更高的生物量。施用根系分泌物更强烈地增加AM真菌的目标植物的定殖和AM真菌孢子萌发时，分泌物供体是从引进的种群。土壤中添加活性炭后AM真菌定殖率降低，进一步证实了根系分泌物化学物质的作用。此外，向土壤中添加槲皮素增加了AM真菌的定殖，表明槲皮素可能是刺激AM真菌联合的关键化学信号。总之，这些结果表明，根分泌物黄酮类化合物的遗传差异在增强AM真菌协会和入侵植物的性能中起着重要作用，因此考虑根分泌物化学物质对于揭示植物入侵期间植物-土壤微生物相互作用的机制至关重要。
Many invasive plants have enhanced mutualistic arbuscular mycorrhizal (AM) fungal associations, however, mechanisms underlying differences in AM fungal associations between introduced and native populations of invasive plants have not been explored. Here we test the hypothesis that variation in root exudate chemicals in invasive populations affects AM fungal colonization and then impacts plant performance. We examined flavonoids (quercetin and quercitrin) in root exudates of native and introduced populations of the invasive plant Triadica sebifera and tested their effects on AM fungi and plant performance. We found that plants from introduced populations had higher concentrations of quercetin in root exudates, greater AM fungal colonization and higher biomass. Applying root exudates more strongly increased AM fungal colonization of target plants and AM fungal spore germination when exudate donors were from introduced populations. The role of root exudate chemicals was further confirmed by decreased AM fungal colonization when activated charcoal was added into soil. Moreover, addition of quercetin into soil increased AM fungal colonization, indicating quercetin might be a key chemical signal stimulating AM fungal associations. Together these results suggest genetic differences in root exudate flavonoids play an important role in enhancing AM fungal associations and invasive plants’ performance, thus considering root exudate chemicals is critical to unveiling mechanisms governing shifting plant-soil microbe interactions during plant invasions.
登录
查看更多内容
影响因子：
3.7
作者：
Grilli, G.;Urcelay, C.;Galetto, L.
通讯作者：
Galetto, L.
影响因子：
2.7
作者：
Holland, JN;Cheng, WX;Crossley, DA
通讯作者：
Crossley, DA
影响因子：
4.3
作者：
Larose, G;Chênevert, R;Vierheilig, H
通讯作者：
Vierheilig, H
影响因子：
3.6
作者：
Kang, Kui;Yue, Lei;Zhang, Wenqing
通讯作者：
Zhang, Wenqing
影响因子：
9.4
作者：
Buecking, Heike;Abubaker, Jehad;Shachar-Hill, Yair
通讯作者：
Shachar-Hill, Yair