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首页> 外文期刊>Journal of Experimental Botany >The peripheral xylem of grapevine (Vitis vinifera). 1. Structural integrity in post-veraison berries
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The peripheral xylem of grapevine (Vitis vinifera). 1. Structural integrity in post-veraison berries

机译：葡萄（Vitis vinifera）的外围木质部。 1.后验证浆果的结构完整性

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摘要

During the development of many fleshy fruits, water flow becomes progressively more phloemic and less xylemic. In grape (Vitis vinifera L.), the current hypothesis to explain this change is that the tracheary elements of the peripheral xylem break as a result of berry growth, rendering the xylem structurally discontinuous and hence non-functional. Recent work, however, has shown via apoplastic dye movement through the xylem of post-veraison berries that the xylem should remain structurally intact throughout berry development. To corroborate this, peripheral xylem structure in developing Chardonnay berries was investigated via maceration and plastic sectioning. Macerations revealed that, contrary to current belief, the xylem was comprised mostly of vessels with few tracheids. In cross-section, the tracheary elements of the vascular bundles formed almost parallel radial files, with later formed elements toward the epidermis and earlier formed elements toward the centre of the berry. Most tracheary elements remained intact throughout berry maturation, consistent with recent reports of vascular dye movement in post-veraison berries.
机译：在许多肉质水果的发育过程中，水的流动逐渐变得越来越疏疏，越来越少了木糖。在葡萄（Vitis vinifera L.）中，当前的解释这一变化的假说是，由于浆果的生长，外围木质部的气管元件断裂，从而使木质部在结构上不连续，因此失去功能。然而，最近的研究表明，通过质外性染料在游走后浆果的木质部中的移动，木质部应该在整个浆果发育过程中保持结构完整。为了证实这一点，通过浸渍和塑料切片研究了霞多丽浆果在发育过程中周围木质部的结构。浸渍法表明，与目前的看法相反，木质部主要由很少管胞的血管组成。在横截面中，维管束的气管元件形成了几乎平行的径向锉，后来形成的元件朝向表皮，早期形成的元件朝向浆果的中心。大多数气管元件在整个浆果成熟过程中都保持完好无损，这与最近关于veraison浆果中血管染料运动的报道相一致。

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