干旱区生态环境知识资源中心(Arid): 光和水分胁迫对臭柏实生幼苗光化学效率及色素组成的影响

Arid

	光和水分胁迫对臭柏实生幼苗光化学效率及色素组成的影响
其他题名	Effect of Light and Water Stress on Photochemical Efficiency and Pigment Composition of Sabina vulgaris Seedlings
	张金玲; 程达; 李玉灵; 陈海鹏
来源期刊	植物学报
ISSN	1674-3466
出版年	2017
卷号	52 期号:3 页码:278-289
中文摘要	为探明毛乌素沙地3年生臭柏(Sabina vulgaris)实生苗在不同光照和水分条件下的光抑制响应机制,研究了各处理臭柏实生苗的最大光化学效率(F_v/F_m)及叶绿素(Chla+Chlb)和叶黄素(A+V+Z)含量,分析了其叶绿素循环和叶黄素循环的变化规律。结果表明, 77%透光区通过减少Chlb含量,升高Chla/Chlb,避免光能过剩;同时,增加A+V+Z及热散逸色素(A+Z)含量、提高(A+V+Z)/(Chla+Chlb)和(A+V)/(A+V+Z)值,耗散过剩光能,避免光破坏。25%透光区的叶绿素和叶黄素循环机制随着水分条件的变化迅速发生改变。10%透光区通过增加Chlb含量,降低Chla/Chlb,捕捉更多的光能,几乎不存在光抑制。毛乌素臭柏实生幼苗能够适应不同的光照和水分条件,在恶劣的沙漠中完成天然更新,形成独特的群落景观,与叶绿素循环和叶黄素循环有着密切的关系。
英文摘要	We aimed to ascertain the photoinhibition response mechanism of 3-year-old Sabina vulgaris seedlings of Mu Us Sandland in different light and water conditions. We examined the photochemical efficiency of photosystem II at predawn (F_v/F_m) and the content of chlorophyll (Chla+Chlb) and lutein (A+V+Z) of every treatment and analyzed the change law of chlorophyll cycle and xanthophyll cycle. Sabina vulgaris seedlings avoided excess light energy and photodamage and dissipated excess light energy by decreasing the content of chlorophyllb (Chlb) and increasing the ratio of Chla to Chlb (Chla/Chlb ratio), content of A+V+Z and A+Z, (A+V+Z)/(Chla+Chlb) ratio and (A+V)/(A+V+Z) ratio in 77% light transmittance area. The mechanism of chlorophyll cycle and xanthophyll cycle of S. vulgaris seedlings was changed quickly with the change in water condition in 25% light transmittance area. S. vulgaris seedlings captured more light energy by increasing the content of Chlb and decreasing the Chla/Chlb ratio in 10% light transmittance area, with little photoinhibition in this area. S. vulgaris seedlings in Mu Us Sandland can adapt to different light and water conditions and can complete their natural regeneration as a unique community landscape in the harsh desert, which is closely related to chlorophyll cycle and xanthophyll cycle.
中文关键词	臭柏 ; 光抑制 ; 最大光化学效率 ; 叶绿素循环 ; 叶黄素循环
英文关键词	Sabina vulgaris photoinhibition maximum photochemical efficiency chlorophyll cycle xanthophyll cycle
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5991313
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236970
作者单位	河北农业大学林学院, 保定, 河北 071000, 中国
推荐引用方式 GB/T 7714	张金玲,程达,李玉灵,等. 光和水分胁迫对臭柏实生幼苗光化学效率及色素组成的影响[J],2017,52(3):278-289.
APA	张金玲,程达,李玉灵,&陈海鹏.(2017).光和水分胁迫对臭柏实生幼苗光化学效率及色素组成的影响.植物学报,52(3),278-289.
MLA	张金玲,et al."光和水分胁迫对臭柏实生幼苗光化学效率及色素组成的影响".植物学报 52.3(2017):278-289.