Responses in growth,physiology and nitrogen nutrition of dragon spruce (Picea asperata) seedlings of different ages to enhanced ultraviolet-B

doi:10.1007/s11738-007-0027-4

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	Responses in growth,physiology and nitrogen nutrition of dragon spruce (Picea asperata) seedlings of different ages to enhanced ultraviolet-B
	Yao, Xiaoqin 1,2; Liu, Qing 2
刊名	ACTA PHYSIOLOGIAE PLANTARUM
	2007-06
卷号	29 期号:3 页码:217-224
关键词	dragon spruce glutamine synthetase nitrate reductase nitrogen Picea asperata pigment proline soluble protein UV-B absorbing compounds UV-B
ISSN号	0137-5881
DOI	10.1007/s11738-007-0027-4
产权排序	1
文献子类	Article
英文摘要	In the southeast of the Qinghai-Tibetan Plateau of China, dragon spruce ( Picea asperata) is a key species and widely used in reforestation processes in the area. The paper mainly studied the effects of ultraviolet-B ( UV-B) on growth, physiology and nitrogen nutrition of 3- and 6-year-old dragon spruce seedlings. The experimental design included ambient UV-B ( control) and enhanced UV-B (+UV-B, a 30% increase). Enhanced UV-B significantly decreased growth, needle and root nitrogen concentration, needle nitrate reductase activity and increased UV-B absorbing compounds and malondialdehyde ( MDA) content of two old dragon spruce seedlings. Glutamine synthetase activity was not affected by enhanced UV-B in two old dragon spruce seedlings. On the other hand, different old seedlings also exhibited different physiological responses to enhanced UV-B radiation. Chlorophyll content, carotenoids content and soluble protein content in 3-year-old seedlings significantly reduced by enhanced UV-B, but those in 6-year-old seedlings were not affected by enhanced UV-B. Proline content of 6-year-old seedlings were increased by enhanced UV-B. Compared with the 3-year-old seedlings, the 6-year-old seedlings showed lower reduction of growth and MDA content, and accumulated more proline and UV-B absorbing compounds for protecting seedlings under enhanced UV-B. The results implicated that 3-year-old seedlings were more sensitivity to enhanced UV-B than 6-year-old seedlings.
学科主题	Plant Sciences
URL标识	查看原文
WOS关键词	UV-B ; ABSORBING COMPOUNDS ; RADIATION ; PHOTOSYNTHESIS ; PROLINE ; STRESS ; PLANTS ; PEROXIDATION ; CAROTENOIDS ; METABOLISM
WOS研究方向	Plant Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000249586400006
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/29944]
专题	生物多样性与生态系统服务领域_生态研究
通讯作者	Liu, Qing
作者单位	1.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 2.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China;
推荐引用方式 GB/T 7714	Yao, Xiaoqin,Liu, Qing. Responses in growth,physiology and nitrogen nutrition of dragon spruce (Picea asperata) seedlings of different ages to enhanced ultraviolet-B[J]. ACTA PHYSIOLOGIAE PLANTARUM,2007,29(3):217-224.
APA	Yao, Xiaoqin,&Liu, Qing.(2007).Responses in growth,physiology and nitrogen nutrition of dragon spruce (Picea asperata) seedlings of different ages to enhanced ultraviolet-B.ACTA PHYSIOLOGIAE PLANTARUM,29(3),217-224.
MLA	Yao, Xiaoqin,et al."Responses in growth,physiology and nitrogen nutrition of dragon spruce (Picea asperata) seedlings of different ages to enhanced ultraviolet-B".ACTA PHYSIOLOGIAE PLANTARUM 29.3(2007):217-224.