An Ancestral Function of Strigolactones as Symbiotic Rhizosphere Signals
An Ancestral Function of Strigolactones as Symbiotic Rhizosphere Signals
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独脚金内酯作为共生根际信号的祖先功能
DOI：
10.1101/2021.08.20.457034
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Kyozuka Junko
中科院分区：
文献类型：
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作者：
Kodama Kyoichi;Rich Melanie K.;Yoda Akiyoshi;Shimazaki Shota;Xie Xiaonan;Akiyama Kohki;--- ;Yamaguchi Shinjiro;Shimamura Masaki;Delaux Pierre-Marc;Nomura Takahito;Kyozuka Junko
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bryoste地钱paleacea。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。我们表明，拟南芥的SL受体rendersM。古生物细胞对BSB有反应。这些结果表明，BSB是不感知的M。由于缺乏同源的SL受体，导致了古细胞的死亡。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。
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 bryophyteMarchantia 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 rendersM. paleaceacells BSB-responsive. These results suggest that BSB is not perceived byM. paleaceacells 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.