欢迎访问《植物研究》杂志官方网站,今天是 分享到:

植物研究 ›› 1996, Vol. 16 ›› Issue (3): 346-350.

• 论文 • 上一篇    下一篇

盐胁迫对星星草幼苗光合特性的影响

孙国荣1, 阎秀峰2   

  1. 1. 150080 哈尔滨, 哈尔滨师范大学生物系;
    2. 150040 哈尔滨, 东北林业大学森林植物生态学开放研究实验室
  • 收稿日期:1995-10-01 出版日期:1996-09-15 发布日期:2016-06-14

EFFECT OF SALT STRESS ON PHOTOSYNTHETIC CHARACTERS OF SEEDLINGS OF PUCCINELLIA TENUIFLORA

Sun Guo-rong1, Yan Xiu-feng2   

  1. 1. Department of Biology, Harbin Normal University, Harbin, 150080;
    2. Open Research Laboratory of Forest Plant Ecology, Northeast Forestry University, Harbin 150040
  • Received:1995-10-01 Online:1996-09-15 Published:2016-06-14

摘要: 对松嫩碱化草地上人工种植生长一至三年的星星草和自然生长的天然星星草的光合蒸腾特性的季节变化进行了测定。星星草光合速率的季节变化是单峰曲线,抽穗期光合速率最大。星星草的蒸腾速率则随生育期进程逐渐减小,但单位面积草地上星星草群体蒸腾速率的季节变化为单峰曲线,一年生、二年生和三年生星星草的最大值在开花期,而天然星星草则在抽穗期。星星草水分利用效率的季节变化也是单峰曲线,峰值均在抽穗期。

关键词: 星星草幼苗, 光合速率, 盐胁迫, 气孔导度, 叶内CO浓度

Abstract: Effects of mixed salt stress on photosynthetic characters is different to short term (6d) and long term (45d) salinity in Puccinelliatenuiflora seedlings. Photosynthetic rate is not inhibited under short term salt stress less than 1.0% mixed salt until relative high salinities are attained, and may be stimulated at lower salinities. The decline in stomatal conductance with increase in salinity was accompanied by a nearly propertional decrease in the photosynthetic rate, the internal CO2 concentration increases over the entire salinity range, even though st

Key words: Seedlings of Puccinelia tenuiflora, Photosynthetic rate, Salt stress, Stomatal conductance, Internal CO2 concentration