OSMOTIC-STRESS, ENDOGENOUS ABSCISIC-ACID AND THE CONTROL OF LEAF MORPHOLOGY IN HIPPURIS-VULGARIS L
OSMOTIC-STRESS, ENDOGENOUS ABSCISIC-ACID AND THE CONTROL OF LEAF MORPHOLOGY IN HIPPURIS-VULGARIS L
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DOI：
10.1111/j.1365-3040.1989.tb01929.x
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发表时间：
1989-03-01
影响因子：
7.3
通讯作者：
FELDMAN, LJ
中科院分区：
文献类型：
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作者：
GOLIBER, TE;FELDMAN, LJ
以往的研究表明，异叶水生植物在外源脱落酸（ABA）的作用下，可诱导其在淹没芽上形成空中型叶片。本研究报道了异叶水生植物Hippuris vulgaris的渗透胁迫（如茎尖在水面以上生长时所遇到的情况）、内源ABA（气相色谱-电子捕获检测器测定）与叶片形态之间的关系。水浸枝中未检测到游离ABA，而地上枝中ABA含量约为40 ng (g / wt)-1。浸水芽受到渗透胁迫时，ABA含量为26 ~ 40 ng (g / wt)-1。这些数据和其他数据支持两个主要结论：(1)浸没注射的渗透压导致出现可检测水平的ABA。（2）. 浸没枝条中ABA含量的增加反过来又引起叶片形态从浸没到气生的变化。这证实了一个假设，即在自然环境中，当浸没的芽通过水/空气界面生长时，ABA水平会随着渗透胁迫而升高，ABA的增加导致了空中型叶片的产生。
Previous reports indicate that heterophyllous aquatic plants can be induced to form aerial-type leaves on submerged shoots when they are grown in exogenous abscisic acid (ABA). This study reports on the relationship between osmotic stress (e.g. the situation encountered by a shoot tip when it grows above the water surface), endogenous ABA (as measured by gas chromatography-electron capture detector) and leaf morphology in the heterophyllous aquatic plant, Hippuris vulgaris. Free ABA could not be detected in submerged shoots of H. vulgaris but in aerial shoots ABA occurred at ca. 40 ng (g fr wt)-1. When submerged shoots were osmotically stressed ABA appeared at levels of 26 to 40 ng (g fr wt)-1. These and other data support two main conclusions: (1) Osmotically stressing a submerged shot causes the appearance of detectable levels of ABA. (2). The rise of ABA in osmotically stressed submerged shoots in turn induces a change in leaf morphology from the submerged to the aerial form. This corroborates the hypothesis that, in the natural environment, ABA levels rise in response to the osmotic stress encountered when a submerged shoot grows up throguh the water/air interface and that the increased ABA leads to the production of aerial-type leaves.