发芽
臭氧
花粉
花粉管
延伸率
园艺
化学
植物
生物
毒理
授粉
材料科学
极限抗拉强度
有机化学
冶金
出处
期刊:Science
[American Association for the Advancement of Science]
日期:1968-06-07
卷期号:160 (3832): 1122-1122
被引量:66
标识
DOI:10.1126/science.160.3832.1122
摘要
Pollen of the ozone-sensitive tobacco variety Bel W-3 undergoes a reduction in germination rate and tube elongation when exposed to ozone. As little as 0.1 part of ozone per million for a 5.5-hour exposure period is sufficient to cause a 40 to 50 percent reduction in germination and a 50 percent reduction in pollen-tube elongation. Ozone causes these effects to approximately the same degree whether the pollen is exposed to ozone in vitro or agar disks, or in vivo when the intact plant is exposed. Exposure to ozone at a concentration of 1.0 part per million for more than 3 hours in vitro completely prevents germination of Bel W-3 pollen.
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