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首页> 外文期刊>Vitis >The progression of primary bud necrosis in the grapevine cv. Shiraz (Vitis vinifera L.): A histological analysis
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The progression of primary bud necrosis in the grapevine cv. Shiraz (Vitis vinifera L.): A histological analysis

机译：葡萄藤中原发芽坏死的进展。设拉子（Vitis vinifera L.）：组织学分析

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摘要

Primary Bud Necrosis (PBN) is a physiological disorder occurring in the compound axillary buds of grapevines. PBN causes the axillary bud to senesce and in some cases secondary buds can also abort. Since PBN is common in the grapevine variety Shiraz the aim of this study was to characterise anatomical changes at different stages of PBN development in this cultivar. Grapevine buds were collected from a vineyard located at Charleston, South Australia, Australia. Buds were dissected, assessed for the presence of PBN and rated on severity of the disorder. Buds at various stages of PBN were fixed for light microscopy. Cell breakdown was observed in all buds where PBN was visible. Collapse and thickening of cell walls was observed in a region of necrotic tissue and severity of PBN appeared to increase over time. The location of cell breakdown due to PBN appeared to be random and was not isolated to one region within the primary bud. PBN appeared to stop primordial growth, with cells differentiating further and maturing more rapidly without forming whole leaves. This cell region then breaks down and the necrosis can extend into the secondary buds.
机译：原发性坏死（PBN）是一种生理疾病，发生在葡萄的复合腋芽中。 PBN会引起腋芽衰老，在某些情况下，次生芽也会流产。由于PBN在葡萄品种设拉子中很常见，因此本研究的目的是表征该品种PBN发育不同阶段的解剖学变化。葡萄芽是从位于澳大利亚南澳大利亚州查尔斯顿的葡萄园中收集的。切开芽，评估PBN的存在，并评估疾病的严重程度。将PBN不同阶段的芽固定以进行光学显微镜检查。在可见PBN的所有芽中均观察到细胞分解。在坏死组织区域观察到细胞壁的塌陷和增厚，PBN的严重程度似乎随时间增加。由于PBN而导致的细胞分解位置似乎是随机的，并且未分离到初级芽中的一个区域。 PBN似乎停止了原始生长，细胞进一步分化并更快地成熟而没有形成完整的叶子。然后，该细胞区域破裂，坏死可以扩展到次生芽中。

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