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Stomatal rings: structure, functions and origin
Botanical Journal of the Linnean Society ( IF 2.4 ) Pub Date : 2020-12-08 , DOI: 10.1093/botlinnean/boaa096
Anatoly Pautov 1 , Svetlana Bauer 2 , Olga Ivanova 1 , Elena Krylova 1 , Olga Yakovleva 3 , Yulia Sapach 1 , Irina Pautova 4
Affiliation  

Stomatal rings are structural elements of stomata of some flowering plants, being found in various groups of eudicots. The presence of a stomatal ring on a stoma does not depend on stomatal complex types, dimensions of stomata or their density. The guard cells of these stomata lie on the subsidiary cells. The location of the outer ledges on the outer tangential walls of the guard cells and the position of the stomatal rings on the guard cell walls around the outer ledges or on the outer ledges themselves are also among the characteristic features of these stomata. To elucidate the role of the stomatal rings we applied modelling using the finite-element method. The modelling has shown that the outer ledges prevent movements of the outer tangential walls of the guard cells and stimulate movements of the inner tangential walls and the immersion of the opening stomatal pore in the epidermis. Stomatal rings can enhance this effect. They also prevent the movements of the outer ledges and the widening of the stomatal aperture between them during stoma opening. This type of stomata occurs in evergreen plants growing in diverse conditions.

中文翻译:

气孔环:结构,功能和起源

气孔环是某些开花植物气孔的结构元素,存在于各种双子叶植物中。气孔上是否存在气孔环并不取决于气孔的复杂类型,气孔的大小或密度。这些气孔的保卫细胞位于辅助细胞上。这些外部孔在保卫室的外切向壁上的位置以及气孔环在保卫室壁上的外部孔或外在其自身上的气孔环的位置也是这些气孔的特征。为了阐明气孔环的作用,我们使用有限元方法进行了建模。该模型表明,外部壁架可防止保护单元外切向壁的运动,并刺激内部切向壁的运动以及开口气孔在表皮中的浸入。气孔环可以增强这种效果。它们还防止在造口打开期间外壁架的移动以及它们之间的气孔孔变宽。这种气孔发生在以不同条件生长的常绿植物中。
更新日期:2020-12-08
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