Functional innovations of PIN auxin transporters mark crucial evolutionary transitions during rise of flowering plants

第一作者：Yuzhou Zhang

第一单位：奥地利科学技术研究所

通讯作者：Jiří Friml

 Abstract 

背景回顾：Flowering plants display the highest diversity among plant species and have notably shaped terrestrial landscapes.

提出问题：Nonetheless, the evolutionary origin of their unprecedented morphological complexity remains largely an enigma.

主要发现：Here, we show that the coevolution of cis-regulatory and coding regions of PIN-FORMED (PIN) auxin transporters confined their expression to certain cell types and directed their subcellular localization to particular cell sides, which together enabled dynamic auxin gradients across tissues critical to the complex architecture of flowering plants.

试验：Extensive intraspecies and interspecies genetic complementation experiments with PINs from green alga up to flowering plant lineages showed that PIN genes underwent three subsequent, critical evolutionary innovations and thus acquired a triple function to regulate the development of three essential components of the flowering plant Arabidopsis: shoot/root, inflorescence, and floral organ.

结论：Our work highlights the critical role of functional innovations within the PIN gene family as essential prerequisites for the origin of flowering plants.

 通讯作者 

doi: https://doi.org/10.1126/sciadv.abc8895

Journal: Science Advance

First Published: Dec 11, 2020

p.s. 往期Jiří Friml通讯研究链接：

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