Acta Agrestia Sinica

›› 2008, Vol. 16 ›› Issue (3): 234-238.DOI: 10.11733/j.issn.1007-0435.2008.03.005

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Tissue Structure Associated with Cold Resistance in Trifolium repens L. Cultivars

ZHAO Wei1, CHEN Ya-jun1,2, GAO Yang1, ZHANG Xue-yan1, LIANG Min1, HE Yang-bo 1   

  1. 1. Horticulture College, Northeast Agricultural University, Harbin, Heilongjiang Province 150030, China;
    2. Forest Plant Ecology Laboratory, Northeast Forestry University, Harbin, Heilongjiang Province 150040, China
  • Received:2007-11-20 Revised:2008-01-08 Online:2008-06-15 Published:2008-06-15

白三叶品种组织结构与抗寒性的关系

赵伟1, 陈雅君1,2, 高阳1, 张雪岩1, 梁敏1, 何阳波1   

  1. 1. 东北农业大学园艺学院, 黑龙江哈尔滨, 150030;
    2. 东北农业大学园艺学院, 黑龙江哈尔滨, 150030
  • 通讯作者: 陈雅君
  • 作者简介:赵伟(1971- ),女,高级工程师,博士研究生,主要从事园林植物资源和逆境生理研究
  • 基金资助:
    黑龙江省“十一五”攻关项目(GB06B112-5);黑龙江省教委科技项目(10531014)

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Abstract: In view of the cold resistance problem of introduced white clover using in gardening in northern China and the cold resistance advantages of native white clover,the changes of tissue structure and the adaptabilities of different white clover cultivars were studied under controlled low temperature conditions.The results show that the number and area of chloroplasts in palisade cells were related to the cold resistance of cultivars;changes of chloroplast structure in different cultivars were evident under cold stress,strong cold resistant cultivars kept the structure well comparatively under a given cold temperature range;the xylem ratio,phloem ratio,and vessel diameter in root were also associated with cold resistance of cultivars.Strong cold resistance cultivars had higher ratio of xylem,lower ratio of phloem,and narrow diameter of vessel.

Key words: White clover, Chloroplast, Xylem, Phloem, Cold resistance

摘要： 针对引进的白三叶(Trifolium repens L.)草坪品种在我国北方园林应用中存在的抗寒性问题,结合国产白三叶资源抗寒性优势,研究低温条件下,不同白三叶组织结构的变化特点和适应性.结果表明:叶肉栅栏细胞内叶绿体数和叶绿体面积与抗寒性有关;低温胁迫下,不同品种叶绿体结构变化最明显,抗寒性强的品种在一定低温范围内保持了较完整的结构;根结构中的木质部、韧皮部比率和导管直径也与抗寒性有关,木质部比率大,韧皮部小,导管直径小,品种抗寒性强.

关键词: 白三叶, 叶绿体, 木质部, 韧皮部, 抗寒性

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