Loss of heterophylly in aquatic plants: not ABA-mediated stress but exogenous ABA treatment induces stomatal leaves in Potamogeton perfoliatus.
Loss of heterophylly in aquatic plants: not ABA-mediated stress but exogenous ABA treatment induces stomatal leaves in Potamogeton perfoliatus.
复制标题
DOI：
10.1007/s10265-016-0844-x
复制
发表时间：
2016-09
影响因子：
2.8
通讯作者：
Kosuge K
中科院分区：
文献类型：
--
作者：
Iida S;Ikeda M;Amano M;Sakayama H;Kadono Y;Kosuge K
异叶水生植物产生气生（即，浮游植物和陆生植物）和沉水植物--后者没有气孔--而同源植物只有沉水叶，不能在陆地上生存。为了确定形态发生潜力和/或生理胁迫反应的差异是否是两种植物类型之间表型可塑性变化的原因，比较了密切相关但生态多样的池塘杂草，莱特眼子菜（异叶）和P. perfoliatus（同叶）之间对脱落酸（阿坝）和盐胁迫的反应。ABA（1或10 μM）处理后的白背蕨植株表现出异叶性，并产生带气孔的叶片。专性沉水后的挂叶侧耳叶片上能产生气孔，但叶片形状没有变化，且气孔仅在高浓度阿坝（10 μM）下产生。在盐胁迫条件下，只有瑞氏杨叶片形成气孔。此外，编码阿坝生物合成关键酶的胁迫响应NCED基因的表达在P. wrightii中持续上调，但在P. perfoliatus中仅暂时上调。所观察到的物种特异性基因表达模式可能是负责在暴露于盐胁迫下的气孔产生的诱导或抑制。这些结果表明，这两个眼子菜属物种具有先天的形态发生能力，形成气孔，但气孔的实际生产取决于ABA介导的胁迫反应，具体到每个物种和栖息地。本文的在线版本（doi：10.1007/s10265-016-0844-x）包含补充材料，可供授权用户使用。
Heterophyllous aquatic plants produce aerial (i.e., floating and terrestrial) and submerged leaves—the latter lack stomata—while homophyllous plants contain only submerged leaves, and cannot survive on land. To identify whether differences in morphogenetic potential and/or physiological stress responses are responsible for variation in phenotypic plasticity between two plants types, responses to abscisic acid (ABA) and salinity stress were compared between the closely related, but ecologically diverse pondweeds, Potamogeton wrightii (heterophyllous) and P. perfoliatus (homophyllous). The ABA-treated (1 or 10 μM) P. wrightii plants exhibited heterophylly and produced leaves with stomata. The obligate submerged P. perfoliatus plants were able to produce stomata on their leaves, but there were no changes to leaf shape, and stomatal production occurred only at a high ABA concentration (10 μM). Under salinity stress conditions, only P. wrightii leaves formed stomata. Additionally, the expression of stress-responsive NCED genes, which encode a key enzyme in ABA biosynthesis, was consistently up-regulated in P. wrightii, but only temporarily in P. perfoliatus. The observed species-specific gene expression patterns may be responsible for the induction or suppression of stomatal production during exposure to salinity stress. These results suggest that the two Potamogeton species have an innate morphogenetic ability to form stomata, but the actual production of stomata depends on ABA-mediated stress responses specific to each species and habitat. The online version of this article (doi:10.1007/s10265-016-0844-x) contains supplementary material, which is available to authorized users.
登录
查看更多内容
影响因子：
5.1
作者：
Hsu, TC;Liu, HC;Lin, BL
通讯作者：
Lin, BL
影响因子：
4.2
作者：
Amano, Momoe;Iida, Satoko;Kosuge, Keiko
通讯作者：
Kosuge, Keiko
影响因子：
3
作者：
LES, DH;SHERIDAN, DJ
通讯作者：
SHERIDAN, DJ
影响因子：
1.4
作者：
Iida, Satoko;Kadono, Yasuro;Kosuge, Keiko
通讯作者：
Kosuge, Keiko
影响因子：
7.3
作者：
GOLIBER, TE;FELDMAN, LJ
通讯作者：
FELDMAN, LJ