草地学报

草地学报 ›› 2015, Vol. 23 ›› Issue (1): 215-218.DOI: 10.11733/j.issn.1007-0435.2015.01.034

• 研究专报 • 上一篇    下一篇

南荻衰老的形态和生理生化特征的研究

李莎莎1, 艾辛1,2, 龙卫1, 易自力1, 黄红梅1, 肖亮1   

  1. 1. 湖南农业大学生物科学技术学院, 湖南 长沙 410128;
    2. 湖南农业大学园艺园林学院, 湖南 长沙 410128
  • 收稿日期:2014-02-10 修回日期:2014-07-08 出版日期:2015-02-15 发布日期:2015-01-31
  • 通讯作者: 艾辛
  • 作者简介:李莎莎(1989-),女,陕西韩城人,硕士研究生,主要从事芒属能源植物分子育种方向,E-mail:lishaable@163.com
  • 基金资助:

    国家自然科学基金项目(31271788)资助

Morphological and Physiological Characteristics of Miscanthus lutarioriparius During Leaf Senescence in Autumn

LI Sha-sha1, AI Xin1,2, LONG Wei1, Yi Zi-li1, HUANG Hong-mei1, XIAO Liang1   

  1. 1. College of Bioscience & Biotechnology, Hunan Agricultural University, Changsha, Hunan Province 410128, China;
    2. College of Horticulture and Landscape, HNAU, Changsha, Hunan Province 410128, China
  • Received:2014-02-10 Revised:2014-07-08 Online:2015-02-15 Published:2015-01-31

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摘要：

为探讨南荻(Miscanthus lutarioriparius)衰老的形态与生理生化特征间的关系,以5种基因型的南荻为试材料,利用目测分级法对其衰老程度进行分级,并测定了旗叶、倒二叶和倒三叶生理生化指标.结果表明:南荻叶片的衰老等级与叶绿素含量成显著负相关,丙二醛(MDA)含量从孕穗期至果实成熟期逐渐增加,超氧化物歧化酶(SOD)活性从孕穗期到抽穗期处于上升阶段,抽穗后到成熟期呈下降趋势;南荻衰老程度在空间上并无规律,但衰老速度在不同基因型间存在差异.

关键词: 南荻, 形态特征, 生理生化, 叶片衰老

Abstract:

To explore the correlation between senescence morphology and physiology, the senescence score of visual measurement and the physiological indexes of the flag leaf, the second leaf and the third leaf were examined during plant senescence stage using five different genotypes of M. lutarioriparus as experimental materials. Results showed that the increase of senescence score during blooming phenophase was a significant negative correlation with chlorophy(a+b) content. The content of malondialdehyde(MDA)increased from booting stage to fruit maturation stage and the activity of superoxide dismutase(SOD) increased from flowering stage to heading stage then decreased after heading stage. The aging degrees of different M. lutarioriparius genotypes were irregular, and the senescent speeds differed from different genotypes.

Key words: M.lutarioriparius , Phenotype, Physiology, Leaf senescence

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