Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1469-8137.2004.01023.x |
Photosynthetic responses of Larrea tridentata to seasonal temperature extremes under elevated CO2 | |
Naumburg, E; Loik, ME; Smith, SD | |
通讯作者 | Naumburg, E |
来源期刊 | NEW PHYTOLOGIST
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ISSN | 0028-646X |
出版年 | 2004 |
卷号 | 162期号:2页码:323-330 |
英文摘要 | Elevated CO2 potentially decreases the effects of temperature stress on photosynthesis. Under both freezing and high temperatures previous studies have shown that elevated CO2 can particularly enhance photosynthetic rates, although results from freezing studies are more variable. Here we show gas exchange responses of Larrea tridentata to elevated CO2 over a 6-yr. period when temperature stress events may have had a significant effect on photosynthesis in the field. Nighttime freezing air temperatures decreased subsequent daytime photosynthetic rates, stomatal conductance, and the maximum yield of PSII similarly under ambient and elevated CO2. Further, we found no statistically significant relationship between leaf temperature and photosynthetic enhancement. Overall, the degree of photosynthetic enhancement under elevated CO2 was directly proportional to the response of stomatal conductance to CO2. Thus, elevated CO2 does not significantly affect apparent physiological responses of Larrea to temperature extremes. However, because of the tight relationship between stomatal conductance and photosynthetic enhancement, potential climate change effects on stomatal conductance will significantly influence Larrea performance in the future. |
英文关键词 | atmospheric change climate change creosote bush FACE freezing photosynthetic enhancement temperature stress |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000221058900007 |
WOS关键词 | INDUCED XYLEM CAVITATION ; GLOBAL CLIMATE-CHANGE ; ATMOSPHERIC CO2 ; COLD-ACCLIMATION ; MOJAVE DESERT ; CHLOROPHYLL FLUORESCENCE ; CARBON-DIOXIDE ; NEVADA DESERT ; GAS-EXCHANGE ; FREEZING TEMPERATURES |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/147714 |
作者单位 | (1)Univ Nevada, Dept Biol Sci, Las Vegas, NV 89154 USA;(2)Univ Calif Santa Cruz, Dept Environm Studies, Santa Cruz, CA 95064 USA |
推荐引用方式 GB/T 7714 | Naumburg, E,Loik, ME,Smith, SD. Photosynthetic responses of Larrea tridentata to seasonal temperature extremes under elevated CO2[J],2004,162(2):323-330. |
APA | Naumburg, E,Loik, ME,&Smith, SD.(2004).Photosynthetic responses of Larrea tridentata to seasonal temperature extremes under elevated CO2.NEW PHYTOLOGIST,162(2),323-330. |
MLA | Naumburg, E,et al."Photosynthetic responses of Larrea tridentata to seasonal temperature extremes under elevated CO2".NEW PHYTOLOGIST 162.2(2004):323-330. |
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