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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (19): 298-302.

所属专题： 生物技术

• 农学 农业基础科学 • 上一篇    下一篇

低温胁迫下袖珍椰子幼苗的某些生理学变化

廖启炓   

  • 收稿日期:2009-06-16 修回日期:2009-07-28 出版日期:2009-10-05 发布日期:2009-10-05
  • 基金资助:

    国家建设部“棕榈科植物的引种筛选与区划推广”科技项目

Some Physiological Changes in Chamaedorea elegans Seedling under Low Temperature Stress

  • Received:2009-06-16 Revised:2009-07-28 Online:2009-10-05 Published:2009-10-05

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摘要：

摘要:在2℃低温胁迫下, 袖珍椰子(Chamaedorea elegans H. Wendl.)幼苗叶片的MDA含量逐渐增加,膜脂过氧化作用逐渐增强。电解质渗出率在3d后增至92.35%, 细胞膜受到不可逆伤害。细胞保护酶SOD、POD和CAT酶活性呈现初期增高,随后下降的趋势，其中CAT酶活性降幅最大。叶片净光合速率随低温胁迫时间延长也呈现下降，5d后，净光合速率为-1.89 μmol CO2 ?cm-2?s-1；蒸腾速率在低温处理4d内变化不大，5d时表现为显著下降。

关键词: 鹅, 鹅, 生长激素受体基因, 实时荧光定量PCR

Abstract:

Abstract:Under 2℃ low temperature stress , malondialdehyde (MDA) content in leaves of Chamaedorea elegans H. Wendl. seedling gradually increased, reflecting that membrane lipid peroxidation aggravated. Electrolyte leakage increased to 92.35% after 3d, cell membrane was damaged irreversible. Cell defense enzymes SOD, POD and CAT activity raised at early stage, and then lowered, especially enzymes CAT falls greatly. Net photosynthetic rate in leaves decreased to -1.89 μmol CO2 ?cm-2?s-1 after 5d； Transpiration rate in leaves changed little in 4d, but sharp declined after 5d.