Flavonoid levels in roots of Medicago sativa are modulated by the developmental stage of the symbiosis and the root colonizing arbuscular mycorrhizal fungus
Flavonoid levels in roots of Medicago sativa are modulated by the developmental stage of the symbiosis and the root colonizing arbuscular mycorrhizal fungus
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DOI：
10.1078/0176-1617-00896
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发表时间：
2002-12-01
影响因子：
4.3
通讯作者：
Vierheilig, H
中科院分区：
文献类型：
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作者：
Larose, G;Chênevert, R;Vierheilig, H
关于黄酮类化合物对孢子萌发、菌丝生长和 AMF 根部定殖的影响已有大量数据。此外，菌根根中的类黄酮模式发生变化，因此类黄酮被认为是丛枝菌根信号化合物。在我们的工作中，我们研究了紫花苜蓿根中类黄酮的积累，i) 将未定殖的根暴露于含有根内球囊霉组织的无菌溶液后，ii) 在被 G. mosseae 定殖的三个不同阶段，iii) 被 G. mosseae、G. intraradices 或 Gigaspora Rosea 定殖。真菌衍生的信号，ii) 取决于共生的发育阶段，iii) 取决于根部定殖的丛枝菌根真菌。所提供的数据不仅表明菌根关联期间类黄酮积累的时间特异性，而且表明丛枝菌根真菌的特异性。讨论了类黄酮模式变化的可能功能。
Abundant data on the effect of flavonoids on spore germination, hyphal growth and root colonization by AMF are available. Moreover, the flavonoid pattern in mycorrhizal roots changes, thus flavonoids have been suggested as arbuscular mycorrhizal signalling compounds. In our work we studied the accumulation of flavonoids in roots of Medicago sativa i) after the exposure of uncolonized roots to sterile solutions containing Glomus intraradices tissue, ii) at three different stages of colonization by G. mosseae, iii) colonized by G. mosseae, G. intraradices or Gigaspora rosea.We could show that flavonoid accumulation in M. sativa roots i) is induced before root colonization, pointing towards the presence of a fungal-derived signal, ii) depends on the developmental stage of the symbiosis and iii) depends on the root-colonizing arbuscular mycorrhizal fungus. The data presented indicate not only a time-specificity of the flavonoid accumulation during the mycorrhizal association, but also an arbuscular mycorrhizal fungal-specificity. The possible functions of the flavonoid pattern changes are discussed.