植物学报2017，Vol.52Issue(3)：278-289,12.DOI:10.11983/CBB16195
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
Effect of Light and Water Stress on Photochemical Efficiency and Pigment Composition of Sabina vulgaris Seedlings
摘要
Abstract
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 (Fv/Fm) 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.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Key words
Sabina vulgaris/photoinhibition/maximum photochemical efficiency/chlorophyll cycle/xanthophyll cycle引用本文复制引用
张金玲,程达,李玉灵,陈海鹏..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].植物学报,2017,52(3):278-289,12.基金项目
河北省自然科学基金(No.C2011204096)和国家林业公益性行业科研专项(No.201404214) （No.C2011204096）
