文献类型：期刊文献

中文题名：北海道黄杨叶片解剖结构的季节变化

英文题名：Seasonal variation of leaf anatomical structure of Euonymus japonicus 'Cu Zhi'

作者：马妮[1,2] 孙振元[1] 刘庆华[2] 韩蕾[1] 巨关升[1] 钱永强[1] 刘俊祥[1]

第一作者：马妮

机构：[1]中国林业科学研究院林业研究所;[2]青岛农业大学园林园艺学院

年份：2011

卷号：33

期号：6

起止页码：112-118

中文期刊名：北京林业大学学报

外文期刊名：Journal of Beijing Forestry University

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：中央级公益性科研院所基本科研业务专项(200704)

语种：中文

中文关键词：北海道黄杨;叶片;显微结构;超微结构

外文关键词：Euonymus japonicus ＇Cu Zhi＇; leaf; microstructure; ultrastructure

分类号：S718.4

摘要：以北京地区生长的常绿阔叶植物北海道黄杨为材料,应用光学显微镜和电子显微镜研究其叶片结构在不同季节的适应性变化。结果表明:叶片上下表皮外覆盖一层厚角质。从新叶期(4月)到休眠期(1、2月),叶片厚度、栅栏组织、海绵组织及角质层的厚度逐渐增大,而组织疏松度依次降低,各结构数值不同季节差异显著。新叶期和生长季节,叶绿体内积累了大量淀粉粒,细胞内有一个中央大液泡。休眠前期,液泡内陷,淀粉粒逐渐变小,嗜锇颗粒增多,叶绿体略有膨胀。休眠期,极少部分叶绿体膜破裂,基质片层断裂。叶绿体周围的线粒体数量增多,结构完整、内嵴明显,液泡分化为多个小泡,细胞内无中央大液泡。北海道黄杨的抗寒性与发达的角质层与淀粉粒生长季节的积累有关。低温休眠期线粒体和叶绿体的结构高度稳定,其抗寒性增强。
The mesophlly cell structure of Euonymus japonicus ＇Cu Zhi＇ in different growing periods in Beijing area was observed under microscope and transmission electron microscope in this paper.The results showed that there were relatively thicker cuticular membranes on the upper and lower edidermise.Thickness of leaves,palisade tissues,spong tissue and cuticular membrane were enhanced gradually from new leaf period to dormant season period.But the spong ration was lower in the same period.In the season of new leaf and growth,starch grains accumulated in chloroplasts and there was a big centure vacuole in the middle of the cell.But in dormancy season,the starch grains disappeared or diminished.The chloroplasts were injured with some abnormal chloroplasts increased plastoglobuli.The chloroplasts were elementary completed under low temperature and the chloroplast lamellar was disconnected.The number of mitochondrion nearby the chloroplasts was increased.The vacuole differentiated into small steeps.It is suggested that the cold tolerance of E.japonicus ＇Cu Zhi＇ is related to its well-developed cuticular membranes and accumulation of strach grains in growth season.E.japonicus ＇Cu Zhi＇ can survive in winter in the northern region of China just because of its highly stable structure of mitochondrion and the chloroplasts at low temperature.