盐胁迫下百合两个品种的叶绿体和线粒体超微结构比较

A Comparative Electron Microscopic of Ultra Structure in Different Lily Cultivars under Salt Stress

对两个百合品种盐胁迫下超微结构的变化进行了研究分析。结果表明:‘Prato’对照和低盐浓度处理下,叶肉细胞内细胞器丰富,叶绿体片层排列整齐,高盐处理导致细胞器减少,叶绿体解体;而‘Sorbonne’在低盐处理水平表现异常,其细胞器降解,叶绿体空化,片层排列松散,且两品种的线粒体较叶绿体早表现出异常,故推测可能是线粒体结构的损伤进而功能丧失,最终导致叶绿体结构和功能的破坏,叶片提前衰老。

The cytological development of leaves of salt-tolerance cultivar ‘ Prato＇ and combined salt- sensitive cultivar Sorbonne in Lilium, stressed with different concentration of salinity, was studied using transmission electron microscope. The results indicated that under the control and low NaCl concentration, leaves of Prato were abundant with organdies, the lamellae were lined regularly, with the increase of salt concentration, the number of organdies decreased, the chloroplasts degenerated. In contrast to Prato, leaves of Sorbonne showed abnormal behaviors under low NaCl concentration, including degenerated organdies, vacuolated chloroplasts and the loosened lamellae. In addition, mitochondria began to degenerate prior to chloroplasts. It is inferred that degeneration of chloroplasts contributed to the ultra structure of degeneration of mitochondria, which further leading to senescence of leaves.