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Photosynthesis Dark Respiration and Growth of Rumex patientia L. Exposed to Ultraviolet Irradiance (288 to 315 Nanometers) Simulating a Reduced Atmospheric Ozone Column

机译:暴露于紫外线(288至315纳米)的Rumex Patientia L.的光合作用暗呼吸和生长模拟减少的大气臭氧柱

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摘要

Net photosynthesis, dark respiration, and growth of Rumex patientia L. exposed to a ultraviolet irradiance (288-315 nanometers) simulating a 0.18 atm·cm stratospheric ozone column were determined. The ultraviolet irradiance corresponding to this 38% ozone decrease from normal was shown to be an effective inhibitor of photosynthesis and leaf growth. The repressive action on photosynthesis accumulated through time whereas leaf growth was retarded only during the initial few days of exposure. Small increases in dark respiration rates occurred but did not continue to increase with longer exposure periods. A reduction in total plant dry weight and leaf area of approximately 50% occurred after 22 days of treatment, whereas chlorophyll concentrations remained unaltered.
机译:测定了在模拟0.18 atm·cm平流层臭氧柱的紫外线(288-315纳米)下暴露的Rumex Patientia L.的净光合作用,暗呼吸和生长。紫外线辐射对应于臭氧比正常降低38%,被证明是光合作用和叶片生长的有效抑制剂。随着时间的流逝,对光合作用的抑制作用逐渐积累,而叶片的生长仅在暴露的最初几天才受到抑制。暗呼吸速率出现了小幅增加,但随着暴露时间的延长,并没有继续增加。处理22天后,植物总干重和叶面积减少了约50%,而叶绿素浓度保持不变。

著录项

  • 期刊名称 Plant Physiology
  • 作者单位
  • 年(卷),期 1976(58),4
  • 年度 1976
  • 页码 563–568
  • 总页数 6
  • 原文格式 PDF
  • 正文语种
  • 中图分类 R33;
  • 关键词

  • 入库时间 2022-08-17 12:31:56

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