Cold acclimation and photoinhibition of photosynthesis in Scots pine

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	Cold acclimation and photoinhibition of photosynthesis in Scots pine
	Krivosheeva, A ; Tao, DL ; Ottander, C ; Wingsle, G ; Dube, SL ; Oquist, G
刊名	PLANTA
	1996
卷号	200 期号:3 页码:296-305
关键词	frost hardening low temperature photoinhibition photosystem II Pinus scavenging
ISSN号	0032-0935
中文摘要	Cold acclimation of Scots pine did not affect the susceptibility of photosynthesis to photoinhibition. Cold acclimation did however cause a suppression of the rate of CO2 uptake, and at given light and temperature conditions a larger fraction of the photosystem Il reaction centres were closed in cold-acclimated than in nonacclimated pine. Therefore, when assayed at the level of photosystem II reaction centres, i.e. in relation to the degree of photosystem closure, cold acclimation caused a significant increase in resistance to photoinhibition; at given levels of photosystem II closure the resistance to photoinhibition was higher after cold acclimation. This was particularly evident in measurements at 20 degrees C. The amounts and activities of the majority of analysed active oxygen scavengers were higher after cold acclimation. We suggest that this increase in protective enzymes and compounds, particularly superoxide dismutase, ascorbate peroxidase, glutathione reductase and ascorbate of the chloroplasts, enables Scots pine to avoid excessive photoinhibition of photosynthesis despite partial suppression of photosynthesis upon cold acclimation. An increased capacity for light-induced de-epoxidation of violaxanthin to zeaxanthin upon cold acclimation may also be of significance.
学科主题	Plant Sciences
收录类别	SCI
语种	英语
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55681]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Krivosheeva, A,Tao, DL,Ottander, C,et al. Cold acclimation and photoinhibition of photosynthesis in Scots pine[J]. PLANTA,1996,200(3):296-305.
APA	Krivosheeva, A,Tao, DL,Ottander, C,Wingsle, G,Dube, SL,&Oquist, G.(1996).Cold acclimation and photoinhibition of photosynthesis in Scots pine.PLANTA,200(3),296-305.
MLA	Krivosheeva, A,et al."Cold acclimation and photoinhibition of photosynthesis in Scots pine".PLANTA 200.3(1996):296-305.