Low temperature-induced modifications of cell wall content and polysaccharide composition in leaves of winter oilseed rape (Brassica napus L-var. oleifera L.)
Low temperature-induced modifications of cell wall content and polysaccharide composition in leaves of winter oilseed rape (Brassica napus L-var. oleifera L.)
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DOI：
10.1016/s0168-9452(99)00122-3
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发表时间：
1999-10-15
期刊：
影响因子：
5.2
通讯作者：
Kacperska, A
中科院分区：
文献类型：
--
作者：
Kubacka-Zebalska, M;Kacperska, A
在冬油菜（Brassica napus L，var，oleifera L.）幼叶中观察到细胞壁含量和多糖组成的显著变化。cv Jantar）在低温（2 ℃）下生长3周，然后暴露于短暂的冷冻和解冻处理（-5 ℃，18小时）。在冷生长的叶片中，细胞壁含量的增加与较高水平的非共价结合的果胶。果胶中的半乳糖、阿拉伯糖和葡萄糖含量以及半纤维素中的半乳糖和阿拉伯糖含量也增加。暴露的冷驯化植物的冻融处理导致细胞壁含量降低，非共价结合的果胶的水平降低，木糖和葡萄糖的含量降低的半纤维素部分。我们的研究结果表明，细胞壁含量和多糖组成的修改模式取决于植物所暴露的温度范围。细胞壁在冷驯化和冷冻处理的植物中的作用进行了讨论。(C)1999爱思唯尔科学爱尔兰有限公司保留所有权利。
Pronounced modifications in cell wall content and polysaccharide composition were observed in the young leaves of winter oilseed rape plants (Brassica napus L, var, oleifera L. cv Jantar) grown for 3 weeks in cold (2 degrees C) and then exposed to a brief freezing and thawing treatment (-5 degrees C for 18 h). In the cold-grown leaf blades, the increased cell wall content was associated with higher levels of non-covalently bound pectins. The content of galactose, arabinose and glucose in pectins and of galactose and arabinose in hemicelluloses also increased in these leaves. Exposure of cold-acclimated plants to a freeze-thaw treatment resulted in decreased cell wall content, reduced levels of non-covalently bound pectins and decreased contents of xylose and glucose in the hemicellulose fraction. Our findings indicate that the pattern of modifications of cell wall content and polysaccharide composition depends on the range of temperatures the plant has been exposed to. The role of the cell wall in cold-acclimated and freezing treated plants is discussed. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.