An ancestral function of strigolactones as symbiotic rhizosphere signals.
An ancestral function of strigolactones as symbiotic rhizosphere signals.
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DOI：
10.1038/s41467-022-31708-3
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发表时间：
2022-07-08
影响因子：
16.6
通讯作者：
中科院分区：
文献类型：
--
作者：
独脚金内酯（SL）在显花植物中具有双重功能，一方面作为激素调节植物生长发育，另一方面作为根际信号分子诱导植物与AM真菌共生。在这里，我们报告的鉴定bryosymbiol（BSB），SL从地钱。BSB也存在于维管植物中，表明它起源于陆生植物的共同祖先。在AM共生允许条件下，BSB合成增强，BSB缺陷突变体在AM共生中受损。相反，BSB合成的缺乏对生长和基因表达的影响很小。我们发现，拟南芥SL受体的引入使M。paleacea细胞BSB反应。这些结果表明，BSB不被M感知。paleacea细胞由于缺乏同源SL受体。我们认为SL起源于AM共生诱导的根际信号分子，后来被招募为植物激素。独脚金内酯（SL）调节被子植物发育并促进与丛枝菌根菌的共生。在这里，作者表明，bryosymbiol，SL中存在于bratellites和被子植物，促进AM共生地钱paleacea暗示的祖先功能SL根际信号。
In flowering plants, strigolactones (SLs) have dual functions as hormones that regulate growth and development, and as rhizosphere signaling molecules that induce symbiosis with arbuscular mycorrhizal (AM) fungi. Here, we report the identification of bryosymbiol (BSB), an SL from the bryophyte Marchantia paleacea. BSB is also found in vascular plants, indicating its origin in the common ancestor of land plants. BSB synthesis is enhanced at AM symbiosis permissive conditions and BSB deficient mutants are impaired in AM symbiosis. In contrast, the absence of BSB synthesis has little effect on the growth and gene expression. We show that the introduction of the SL receptor of Arabidopsis renders M. paleacea cells BSB-responsive. These results suggest that BSB is not perceived by M. paleacea cells due to the lack of cognate SL receptors. We propose that SLs originated as AM symbiosis-inducing rhizosphere signaling molecules and were later recruited as plant hormone. Strigolactones (SLs) regulate angiosperm development and promote symbiosis with arbuscular mycorrhizae. Here the authors show that bryosymbiol, an SL present in bryophytes and angiosperms, promotes AM symbiosis in Marchantia paleacea suggesting an ancestral function of SLs as rhizosphere signals.
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影响因子：
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作者：
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