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›› 1992, Vol. 28 ›› Issue (3): 193-197.

• 论文及研究报告 •    下一篇

越冬针叶的有机自由基及自由基清除剂

陶大立 靳月华 高均成   

  1. 中国科学院沈阳应用生态研究所;中国计量科学院
  • 收稿日期:1991-01-29 修回日期:1900-01-01 出版日期:1992-07-25 发布日期:1992-07-25

ORGANIC FREE RADICALS AND FREE RADICAL SCAVENGERS IN OVERWINTERING CONIFER NEEDLES

Tao Dali,Jin Yuehua,Gao Juncheng   

  1. Shenyang Institute of Applied Ecology,Academia Sinica;Chinese Academy of measurement
  • Received:1991-01-29 Revised:1900-01-01 Online:1992-07-25 Published:1992-07-25

摘要: 对在长白山越冬的红松和红皮云杉针叶中有机自由基浓度及自由基清除剂Vc含量和SOD活性进行了对比动态监测。发现全光下红松苗针叶在1—5月有机自由基浓度变化格局和其它针叶树种材料迥然不同,4—5月的高峰和它受到的严重光氧化伤害密切有关。Vc含量及SOD活性都在冬季出现高峰,说明它们在保护针叶不受自由基伤害方面起着重要作用。红松针叶中的SOD远低于红皮云杉和樟子松,可能是造成它在越冬期间超氧自由基清除能力不足,易受光氧化伤害的重要原因。

关键词: 红松, 红皮云杉, ESR, 光氧化, SOD, V_C

Abstract: Dynamics of concentrations of organic free radicals (OFR), content of Vc and activity of SOD was monitored for overwintering needles of Pinus sylvestris var. mongolica and Picea koraiensis in the Changbai Mountain. It showed that the patterns of variation in concentrations of OFR in needles of Pinus koraiensis differed clearly from all other tree species, which was closely related to the severe photoxidation injury. The maximum peaks of Vc content and SOD activity of needles were found that during winter they played an important role in protecting needles from the injury induced by free radicals. SOD activity of Pinus koraiensis needles was much lower than that of Picea koraiensis, which was probably the important reason for susceptible photoxidation injury in winter. The relations among freezing, light and oxidative stress were discussed in terms of free radicals and scavengers.

Key words: Pinus koraiensis, Picea koraiensis, Organic free radical (OFR), Photoxidation injury, SOD, Vc