文章基本信息

标题：The diversity of stomatal development regulation in Callitriche is related to the intrageneric diversity in lifestyles
本地全文：下载
作者：Yuki Doll ; Hiroyuki Koga ; Hirokazu Tsukaya 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2021
卷号：118
期号：14
页码：1
DOI：10.1073/pnas.2026351118
出版社：The National Academy of Sciences of the United States of America
摘要：Stomata, the gas exchange structures of plants, are formed by the division and differentiation of stem cells, or meristemoids. Although diverse patterns of meristemoid behavior have been observed among different lineages of land plants, the ecological significance and diversification processes of these different patterns are not well understood. Here we describe an intrageneric diversity in the patterns of meristemoid division within the ecologically diverse genus Callitriche (Plantaginaceae). Meristemoids underwent a series of divisions before differentiating into stomata in the terrestrial species of Callitriche , but these divisions did not occur in amphibious species, which can grow in both air and water, in which meristemoids differentiated directly into stomata. These findings imply the adaptive significance of diversity in meristemoid division. Molecular genetic analyses showed that the different expression times of the stomatal key transcription factors SPEECHLESS and MUTE, which maintain and terminate the meristemoid division, respectively, underlie the different division patterns of meristemoids. Unlike terrestrial species, amphibious species prematurely expressed MUTE immediately after expressing SPEECHLESS , which corresponded to their early termination of stomatal division. By linking morphological, ecological, and genetic elements of stomatal development, this study provides significant insight that should aid ecological evolutionary developmental biology investigations of stomata.
关键词：stomatal development ; amplifying division ; Callitriche ; amphibious plants ; evodevo