Arid
DOI10.1111/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
ISSN0028-646X
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
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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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