番茄种皮形成的形态和结构细节：内表皮和外表皮在统一胚珠中的不同功能作用,Plants

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番茄种皮形成的形态和结构细节：内表皮和外表皮在统一胚珠中的不同功能作用
Plants ( IF 4.0 ) Pub Date : 2022-04-19 , DOI: 10.3390/plants11091101
Inna A Chaban ₁ , Alexander A Gulevich ₂ , Neonila V Kononenko ₁ , Marat R Khaliluev _{2,

3} , Ekaterina N Baranova _{1,

4}

Affiliation

为了了解具有单个珠被的番茄胚珠是如何以及什么样的结构形成成熟种子的种皮，利用光学和电子显微镜的方法对番茄胚珠珠被的主要发育阶段进行了详细研究。表皮本身在发育过程中被证明会转变为成熟种子的外皮（皮肤），但表皮的外表皮和内表皮以及表皮实质的某些层主要参与这一过程。外表皮细胞在后期被高度修饰；它们的墙壁被加厚和木质化，形成了一种独特的相对坚硬的外层。外皮内表皮的命运完全不同。它与外皮的其他薄壁细胞分离，并转化为独立的新分泌组织，即内皮，它将正在形成的胚胎和胚乳与死亡区隔开。由于内皮的分泌活动，外皮垂死的内实质细胞被裂解。角质层覆盖胚乳后不久，死亡的外皮细胞的裂解停止，其扁平的残余物形成致密层，然后进入成熟番茄种子外壳的最终成分。内皮本身返回到外皮内表皮的位置。角质层覆盖胚乳后不久，死亡的外皮细胞的裂解停止，其扁平的残余物形成致密层，然后进入成熟番茄种子外壳的最终成分。内皮本身返回到外皮内表皮的位置。角质层覆盖胚乳后不久，死亡的外皮细胞的裂解停止，其扁平的残余物形成致密层，然后进入成熟番茄种子外壳的最终成分。内皮本身返回到外皮内表皮的位置。

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Morphological and Structural Details of Tomato Seed Coat Formation: A Different Functional Role of the Inner and Outer Epidermises in Unitegmic Ovule

In order to understand how and what structures of the tomato ovule with a single integument form the seed coat of a mature seed, a detailed study of the main development stages of the tomato ovule integument was carried out using the methods of light and electron microscopy. The integument itself it was shown to transform in the course of development into the coat (skin) of a mature seed, but the outer and inner epidermises of the integument and some layers of the integument parenchyma are mainly involved in this process. The outer epidermis cells are highly modified in later stages; their walls are thickened and lignified, creating a unique relatively hard outer coat. The fate of the inner epidermis of integument is completely different. It is separated from the other parenchyma cells of integument and is transformed into an independent new secretory tissue, an endothelium, which fences off the forming embryo and endosperm from the death zone. Due to the secretory activity of the endothelium, the dying inner parenchyma cells of the integument are lysed. Soon after the cuticle covers the endosperm, the lysis of dead integument cells stops and their flattened remnants form dense layers, which then enter the final composition of the coat of mature tomato seed. The endothelium itself returns to the location of the integument inner epidermis.

更新日期：2022-04-19

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