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首页> 外文会议>Geoscience and Remote Sensing Symposium, 1994. IGARSS '94. Surface and Atmospheric Remote Sensing: Technologies, Data Analysis and Interpretation., International >Steady-state chlorophyll fluorescence red/far-red emission ratio increases detected from Pinus strobus after short-term ozone exposure
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Steady-state chlorophyll fluorescence red/far-red emission ratio increases detected from Pinus strobus after short-term ozone exposure

机译：短期暴露于臭氧后从松果tro中检测到稳态叶绿素荧光红/远红发射比增加

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摘要

Steady-state chlorophyll fluorescence measurements of white pine (Pinus strobus L.) exposed to predetermined levels of ozone, have shown significant increases in red/far-red (R/FR) emission intensity ratios in experiments that were part of a study of the effects of short-term ozone exposure to native plants at Acadia National Park, Maine. Laboratory spectrophotometer measurements were made of clonal grafts (ramets) of white pine, prior to, one hour after, and 24 hrs after exposure to ozone (3 hrs duration at 180 mm/sup 3/m/sup -3/). The R/FR fluorescence ratio mean derived from spectra collected 24 hrs after exposure in August 1992, was significantly different from the pre-fumigation R/FR ratio mean (P=0.05). August, 1993 measurements, with a different set of white pine ramets exposed to 120 and 220 mm/sup 3/ m/sup -3/ ozone for 3 hrs, produced R/FR ratio means at 24 hrs post-fumigation that were significant at P=0.05 and 0.20, respectively. Differences in the R/FR ratio means of pre- and 24 hrs post-fumigation measurements for 120, 180, and 220 mm/sup 3/m/sup -3/ ozone indicate dose dependent responses.
机译：暴露于预定水平的臭氧中的白松（Pinus strobus L.）的稳态叶绿素荧光测量结果显示，在红松/远红（R / FR）发射强度比中，红松/远红（R / FR）发射强度比显着增加。缅因州阿卡迪亚国家公园短期暴露于原生植物的臭氧的影响。实验室分光光度计的测量是在暴露于臭氧之前，之后一小时和之后二十四小时对白松的克隆移植物（分株）进行的（180毫米/秒3 /米/秒-3 /的持续时间为3小时）。从1992年8月暴露后24小时收集的光谱得出的R / FR荧光比率平均值与熏蒸前的R / FR比率平均值存在显着差异（P = 0.05）。 1993年8月的测量，将另一套不同的白松分枝在120和220 mm / sup 3 / m / sup -3 /臭氧中暴露3小时，在熏蒸后24小时产生的R / FR比平均值在P分别为0.05和0.20。对于120、180和220 mm / sup 3 / m / sup -3 /臭氧，熏蒸前后24小时的R / FR比平均值的差异表示剂量依赖性响应。

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