Evolution of rapid blue-light response linked to explosive diversification of ferns in angiosperm forests.
Evolution of rapid blue-light response linked to explosive diversification of ferns in angiosperm forests.
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快速蓝光反应的进化与被子植物森林中蕨类植物的爆炸性多样化有关。
DOI：
10.1111/nph.17135
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发表时间：
2021-05
期刊：
影响因子：
--
通讯作者：
Chen ZH
中科院分区：
文献类型：
--
作者：
Cai S;Huang Y;Chen F;Zhang X;Sessa E;Zhao C;Marchant DB;Xue D;Chen G;Dai F;Leebens-Mack JH;Zhang G;Shabala S;Christie JM;Blatt MR;Nevo E;Soltis PS;Soltis DE;Franks PJ;Wu F;Chen ZH
在化石记录中，蕨类植物出现在被子植物之前约200 Myr。然而，随着白垩纪以被子植物为主的森林树冠的出现，现代(钩孢类)蕨类植物出现了爆炸性的多样化，它们在被子植物树冠下低光、蓝光增强的环境中茁壮成长。对于蕨类植物多样化中的这一变革性事件，机制上的解释仍然难以捉摸。我们利用生理分析、转录组分析和进化生物信息学研究了现代蕨类植物气孔对蓝光敏感性增强的进化与被子植物占主导地位的森林在地质记录中的兴起之间的潜在联系。我们证明，钩孢子植物中最大的亚枝水龙骨科的成员比更古老的蕨类和一个代表性的被子植物对蓝光的气孔响应要快得多。我们将这种较高的敏感性与蓝光信号中差异表达基因的水平联系在一起，特别是在隐花色素(CRY)信号通路中。此外，所研究的水龙骨类的CRY在212.9-196.9 Ma和164.4-151.8 Ma之间显示了基因复制事件，当时被子植物正在形成，这是现存的其他主要陆地植物分支所没有的。这些发现表明，气孔蓝光敏感性的进化帮助现代蕨类植物开发被子植物森林树冠下的阴凉生境，助长了它们白垩纪的超多样化。另见Chater对这篇文章的评论，230：886-888。
Ferns appear in the fossil record some 200 Myr before angiosperms. However, as angiosperm‐dominated forest canopies emerged in the Cretaceous period there was an explosive diversification of modern (leptosporangiate) ferns, which thrived in low, blue‐enhanced light beneath angiosperm canopies. A mechanistic explanation for this transformative event in the diversification of ferns has remained elusive. We used physiological assays, transcriptome analysis and evolutionary bioinformatics to investigate a potential connection between the evolution of enhanced stomatal sensitivity to blue light in modern ferns and the rise of angiosperm‐dominated forests in the geological record. We demonstrate that members of the largest subclade of leptosporangiate ferns, Polypodiales, have significantly faster stomatal response to blue light than more ancient fern lineages and a representative angiosperm. We link this higher sensitivity to levels of differentially expressed genes in blue‐light signaling, particularly in the cryptochrome (CRY) signaling pathway. Moreover, CRYs of the Polypodiales examined show gene duplication events between 212.9–196.9 and 164.4–151.8 Ma, when angiosperms were emerging, which are lacking in other major clades of extant land plants. These findings suggest that evolution of stomatal blue‐light sensitivity helped modern ferns exploit the shady habitat beneath angiosperm forest canopies, fueling their Cretaceous hyperdiversification. See also the Commentary on this article by Chater, 230: 886–888.
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影响因子：
4.9
作者：
Doi, Michio;Wada, Masamitsu;Shimazaki, Ken-ichiro
通讯作者：
Shimazaki, Ken-ichiro
影响因子：
6.1
作者：
ENDLER, JA
通讯作者：
ENDLER, JA
DOI：
10.1073/pnas.82.23.8019
发表时间：
1985-01-01
影响因子：
11.1
作者：
IINO, M;OGAWA, T;ZEIGER, E
通讯作者：
ZEIGER, E
影响因子：
3
作者：
Gitzendanner, Matthew A.;Soltis, Pamela S.;Soltis, Douglas E.
通讯作者：
Soltis, Douglas E.
影响因子：
7.4
作者：
Horak, Hanna;Kollist, Hannes;Merilo, Ebe
通讯作者：
Merilo, Ebe