Responses of dark respiration in the light to desiccation and temperature in the intertidal macroalga, Ulva lactuca (Chorophyta) during emersion

CORC > 水生生物研究所 > 中科院水生所知识产出（2009年前） > 期刊论文

	Responses of dark respiration in the light to desiccation and temperature in the intertidal macroalga, Ulva lactuca (Chorophyta) during emersion
	Zou, Dinghui ; Gao, Kunshan ; Xia, Jianrong ; Xu, Zhiguang ; Zhang, Xin ; Liu, Shuxia
刊名	PHYCOLOGIA
	2007-07-01
卷号	46 期号:4 页码:363-370
关键词	dark respiration desiccation emersion intertidal macroalgae Kok effect temperature Ulva
ISSN号	0031-8884
通讯作者	Zou, DH, Shantou Univ, Inst Marine Biol, Ctr Sci, Guangdong 515063, Peoples R China
中文摘要	Dark respiration (nonphotorespiratory mitochondrial CO2 release) in the light (R-L) of the intertidal macroalga Ulva lactuca (Chorophyta) during emersion was investigated with respect to its response to variations in temperature and desiccation. R-L was estimated by CO2 gas-exchange analysis using the Kok effect method, whereas dark respiration in darkness (R-D) was determined from CO2 release at zero light. Rates of R, were significantly and consistently lower than those of R-D in emersed U. lactuca across all the temperature and desiccation levels measured. This demonstrated that dark respiration was partially depressed in the light, with the percentage inhibition ranging from 32 to 62%. Desiccation exerted a negative effect on R-L and R-D at a high temperature, 33 degrees C, whereas it had much less effect on respiration at low and moderate temperatures, 23 and 28 degrees C. In general, R-L and R-D increased with increasing temperature in U. lactuca during all stages of emersion but responded less positively to temperature change with increasing desiccation. Additionally, the Q(10) value (i.e. the proportional increase of respiration for each 10 degrees C rise in temperature) for R-L calculated over the temperature range of 23 to 33 degrees C was significantly higher than that for R-D in U. lactuca during the initial stages of emersion. Respiratory carbon loss as a percentage of gross photosynthetic carbon gain increased with increasing temperature and/or desiccation but was significantly reduced when estimated using R-L rather than R-D. It is suggested that measurements of R-L and how it changes in a variable environment are as important as estimates of R-D and photosynthesis in determining simultaneous balance between photosynthetic carbon uptake and respiratory carbon loss and in modeling the net daily carbon gain for an intertidal macroalga.
英文摘要	Dark respiration (nonphotorespiratory mitochondrial CO2 release) in the light (R-L) of the intertidal macroalga Ulva lactuca (Chorophyta) during emersion was investigated with respect to its response to variations in temperature and desiccation. R-L was estimated by CO2 gas-exchange analysis using the Kok effect method, whereas dark respiration in darkness (R-D) was determined from CO2 release at zero light. Rates of R, were significantly and consistently lower than those of R-D in emersed U. lactuca across all the temperature and desiccation levels measured. This demonstrated that dark respiration was partially depressed in the light, with the percentage inhibition ranging from 32 to 62%. Desiccation exerted a negative effect on R-L and R-D at a high temperature, 33 degrees C, whereas it had much less effect on respiration at low and moderate temperatures, 23 and 28 degrees C. In general, R-L and R-D increased with increasing temperature in U. lactuca during all stages of emersion but responded less positively to temperature change with increasing desiccation. Additionally, the Q(10) value (i.e. the proportional increase of respiration for each 10 degrees C rise in temperature) for R-L calculated over the temperature range of 23 to 33 degrees C was significantly higher than that for R-D in U. lactuca during the initial stages of emersion. Respiratory carbon loss as a percentage of gross photosynthetic carbon gain increased with increasing temperature and/or desiccation but was significantly reduced when estimated using R-L rather than R-D. It is suggested that measurements of R-L and how it changes in a variable environment are as important as estimates of R-D and photosynthesis in determining simultaneous balance between photosynthetic carbon uptake and respiratory carbon loss and in modeling the net daily carbon gain for an intertidal macroalga.
学科主题	Plant Sciences; Marine & Freshwater Biology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Plant Sciences ; Marine & Freshwater Biology
研究领域[WOS]	Plant Sciences ; Marine & Freshwater Biology
关键词[WOS]	PYRUVATE-DEHYDROGENASE COMPLEX ; LEAF RESPIRATION ; PLANT RESPIRATION ; COLPOMENIA-PEREGRINA ; ALTERNATIVE OXIDASE ; THERMAL-ACCLIMATION ; XANTHIUM-STRUMARIUM ; FUCUS-VESICULOSUS ; MARINE MACROALGAE ; CO2 CONCENTRATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000247855900002
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/8500]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.Shantou Univ, Inst Marine Biol, Ctr Sci, Guangdong 515063, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Zou, Dinghui,Gao, Kunshan,Xia, Jianrong,et al. Responses of dark respiration in the light to desiccation and temperature in the intertidal macroalga, Ulva lactuca (Chorophyta) during emersion[J]. PHYCOLOGIA,2007,46(4):363-370.
APA	Zou, Dinghui,Gao, Kunshan,Xia, Jianrong,Xu, Zhiguang,Zhang, Xin,&Liu, Shuxia.(2007).Responses of dark respiration in the light to desiccation and temperature in the intertidal macroalga, Ulva lactuca (Chorophyta) during emersion.PHYCOLOGIA,46(4),363-370.
MLA	Zou, Dinghui,et al."Responses of dark respiration in the light to desiccation and temperature in the intertidal macroalga, Ulva lactuca (Chorophyta) during emersion".PHYCOLOGIA 46.4(2007):363-370.