›› 2017, Vol. 46 ›› Issue (01): 1-7.DOI: 10.3969/j.issn.1009-7791.2017.01.001

• 植物生理生化与分子生物学 •    下一篇

SO2胁迫下桤木叶片硫含量及其生理响应

王丽华,刘尉,徐波,胡庭兴   

  1. (1.阿坝师范学院,四川 汶川 623002;2.成都市农林科学院,四川 成都 611130;3.四川农业大学林学院,四川 成都 611130)
  • 收稿日期:2017-01-13 出版日期:2017-03-30 发布日期:2017-03-30
  • 通讯作者: 刘尉
  • 作者简介:王丽华,博士,讲师,从事植物生理生态学研究。

Physiological Responses and Sulphur Content of Leaves from Alnus cremastogyne to SO2 Stress

WANG Li-hua,LIU Wei,XU Bo,HU Ting-xing   

  1. (1.Aba Teachers University, Wenchuan 623002, Sichuan China; 2.Chengdu Academy of Agriculture and Forestry Sciences, Chengdu 611130, Sichuan China; 3.College of Forestry, Sichuan Agricultural University, Chengdu 611130, Sichuan China)
  • Received:2017-01-13 Online:2017-03-30 Published:2017-03-30
  • Contact: LIU Wei

摘要: 采用人工模拟熏气法,研究SO2胁迫下桤木Alnus cremastogyne的生理响应机制及净化能力。结果表明:(1)桤木叶片在SO2 4.29 mg·m-3和8.57 mg·m-3处理下分别在14 d和7 d时出现伤害症状;(2)随SO2浓度增加,桤木叶片叶绿素总量、叶绿素a/b值和净光合速率呈下降趋势,其中净光合速率在SO2 4.29 mg·m-3处理下与CK无显著差异,而气孔导度、蒸腾速率和胞间CO2浓度呈现先增后降趋势;(3)叶片脯氨酸、可溶性糖、可溶性蛋白质、丙二醛含量均随SO2浓度升高而增加;(4)叶片过氧化物酶和超氧化物歧化酶活性随SO2浓度增加而升高,过氧化氢酶活性呈先降低后升高的趋势;(5)桤木叶片硫含量随SO2浓度增加呈递增趋势。桤木幼树能通过调节自身保护机制应对低浓度SO2逆境胁迫并维持正常生长,可将其用作工厂附近或SO2污染区域造林树种,以改善环境空气质量。

关键词: SO2, 桤木, 生理指标, 含硫量

Abstract: In order to investigate the resistance mechanism and purifying capacity of major afforestation tree species to sulfur dioxide (SO2) pollution, Alnus cremastogyne was selected and studied. The results showed that: (1) The leaves appeared injury symptoms at the 14th and 7th day under SO2 4.29 mg·m-3 and 8.57 mg·m-3 treatments respectively; (2) With the increase of SO2, the content of total chlorophyll (Chl), Chl a/b rate and net photosynthesis rate (Pn) decreased in the leaves, but stomatal conductance (Gs), transpiration rate (Tr) and intercellular CO2 concentration increased first and then decreased, in addition, Pn was no significant difference between CK and treatment of SO2 4.29 mg·m-3; (3) The content of proline (Pro), soluble sugar (SS), soluble protein (SP) and malonaldehyde (MDA) in the leaves rose gradually with increasement of SO2 concentration; (4) The POD and SOD activities in the leaves increased with SO2 increasing, but the CAT activity decreased first and then increased; (5)With the increase of SO2, the sulphur content in the leaves increased. In conclusion, A. cremastogyne could adjust own stress protection system to adapt SO2-polluted environment and maintain the normal growth, it could be planted in SO2 polluted areas as the large-scale use of afforestation tree species and achieve the goal of harnessing pollution.

Key words: SO2, Alnus cremastogyne, physiological index, sulphur content

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