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首页> 外文期刊>Pakistan journal of botany >An elicitor isolated from smut teliospores (Sporisorium scitamineum) enhances lignin deposition on the cell wall of both sclerenchyma and xylem in sugarcane leaves
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An elicitor isolated from smut teliospores (Sporisorium scitamineum) enhances lignin deposition on the cell wall of both sclerenchyma and xylem in sugarcane leaves

机译：分离自黑穗病孢子（Sporisorium scitamineum）的激发子增强了木质素在甘蔗叶片硬皮病和木质部细胞壁上的沉积

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摘要

Sugarcane leaf shows the classical arrangement of cells which defines a C4 species. Vascular bundles consist of xylem, phloem and fibres, surrounded by an outer layer of sclereids and an inner ring of stone cells associated with the phloem. Some sclereids located below and above the vascular bundles act as docking cells and connect the vascular bundle to the internal surfaces of upper and lower layers of the epidermis. A compact mass of sclereids occupies the total internal volume of the leaf edge. Neither docking cells nor the internal mass of sclereids in the edge were markedly coloured by acriflavin or phloroglucinol, indicating the absence of lignin in their cell walls. However, such staining indicated that fibres of the vascular bundle and the external layer of sclereids were strongly lignified. Incubation of leaf discs with an elicitor produced by the pathogen Sporisorium scitamineum increased the thickness of the lignified cell walls of sclereids as well as the mid and small xylem vessels, as a possible mechanical defense response to the potential entry of the pathogen.
机译：甘蔗叶显示出定义C4物种的经典细胞排列方式。血管束由木质部，韧皮部和纤维组成，周围有硬化菌核和与韧皮部相关的石细胞内环。位于血管束下方和上方的一些硬化细胞充当停靠细胞，并将血管束连接至表皮上层和下层的内表面。致密的硬化菌块占据了叶边缘的总内部体积。停泊细胞或边缘的硬化细胞内部都没有被a啶黄素或间苯三酚显色，表明它们的细胞壁中没有木质素。然而，这种染色表明血管束的纤维和硬化细胞的外层被强烈地木质化。叶盘与病原体孢子孢子虫产生的诱导物一起孵育增加了硬化菌以及木质部和小木质部血管的木质化细胞壁的厚度，这是对病原体潜在进入的可能的机械防御反应。

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