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	Photosynthetic refixing of CO2 is responsible for the apparent disparity between mitochondrial respiration in the light and in the dark
	Kang H. J. ; Li H. ; Tao Y. L. ; Ouyang Z.
	2014
关键词	CO2 refixed Light inhibition Mitochondrial respiration in the dark Mitochondrial respiration in the light ribulose-1 leaf respiration gas-exchange chlorophyll fluorescence (co2)-c-12 emission xanthium-strumarium leaves temperature specificity nitrogen 5-bisphosphate carboxylase oxygenase
英文摘要	The net photosynthetic rate (P (N)), the sample room CO2 concentration (CO2S) and the intercellular CO2 concentration (C (i)) in response to PAR, of C-3 (wheat and bean) and C-4 (maize and three-colored amaranth) plants were measured. Results showed that photorespiration (R (p)) of wheat and bean could not occur at 2 % O-2. At 2 % O-2 and 0 mu mol mol(-1) CO2, P (N) can be used to estimate the rate of mitochondrial respiration in the light (R (d)). The R (d) decreased with increasing PAR, and ranged between 3.20 and 2.09 mu mol CO2 m(-2) s(-1) in wheat. The trend was similar for bean (between 2.95 and 1.70 mu mol CO2 m(-2) s(-1)), maize (between 2.27 and 0.62 mu mol CO2 m(-2) s(-1)) and three-colored amaranth (between 1.37 and 0.49 mu mol CO2 m(-2) s(-1)). The widely observed phenomenon of R (d) being lower than R (n) can be attributed to refixation, rather than light inhibition. For all plants tested, CO2 recovery rates increased with increasing light intensity from 32 to 55 % (wheat), 29 to 59 % (bean), 54 to 87 % (maize) and 72 to 90 % (three-colored amaranth) at 50 and 2,000 mu mol m(-2) s(-1), respectively.
出处	Acta Physiologiae Plantarum
卷	36
期	12
页	3157-3162
收录类别	SCI
语种	英语
ISSN号	0137-5881
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29791]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Kang H. J.,Li H.,Tao Y. L.,et al. Photosynthetic refixing of CO2 is responsible for the apparent disparity between mitochondrial respiration in the light and in the dark. 2014.

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