遮阴对红叶樱花光合速率和叶绿素荧光参数的影响  

Effects of Shading on Net Photosynthetic Rate and Chlorophyll Fluorescence Parameters in Leaves of Prunus serrulata Libdl. 'Royal Burgundy'

作　　者：武冲[1] 张晓敏 尹燕雷[1] 冯立娟[1] 杨雪梅[1] 王菲[1] 

机构地区：[1]山东省果树研究所,山东泰安271000 [2]山东沂源园林发展有限公司,山东淄博256100

出　　处：《山东农业科学》2017年第2期48-53,共6页Shandong Agricultural Sciences

基　　金：山东省农业科学院青年科研基金项目(2016YQN31);山东省果树研究所所长基金项目(2016KY09);山东省农业良种工程项目[鲁农良种字(2011)7号]

摘　　要：以一年生红叶樱花嫁接苗为试验材料,研究了24%、50%、85%遮阴处理和全光照处理对红叶樱花叶片色素含量、净光合速率以及叶绿素荧光参数的影响。结果表明,随着遮光率的增高,叶片叶绿素a、叶绿素b含量增加,叶绿素a/b减小;类胡萝卜素含量变化不大;花色苷含量减少。叶片净光合速率(Pn)、初始荧光(Fo)、最大荧光(Fm)、可变荧光(Fv)、PSⅡ最大光化学效率(Fv/Fm)、PSⅡ潜在活性(Fv/Fo)和光化学猝灭系数(qP)增加,但非光化学猝灭系数(q N)降低。全光照条件下,Pn日变化呈双峰曲线,而24%、50%、85%遮阴条件下呈单峰曲线。红叶樱花作为园林观叶植物,遮阴降低了其花色苷的含量,因此在造景搭配时应尽量避免遮阴。Using annual Prunus serrulata seedlings as materials,the pigment content,net photosynthetic rate and chlorophyll fluorescence parameters of leaves were investigated under different shading treatments（ 0,24%,50% and 85%）. The results showed that with the increase of shading efficiency,the contents of chlorophyll a and b in leaves increased,while the chlorophyll a / b reduced. The content of carotenoids changed little,and that of anthocyanins decreased. The net photosynthetic rate（ Pn）,minimal fluorescence（ Fo）,maximum fluorescence（ Fm）,variable fluorescence（ Fv）,maximal photochemical efficiency of PSⅡ（ Fv / Fm）,latent reactivity of PSⅡ（ Fv / Fo） and photochemical quenching coefficient（ q P） enhanced,but the non-photochemical quenching coefficient（ q N） decreased as the shading efficiency increasing. The diurnal variation of net photosynthetic rate presented bimodal curve under no shading treatment,while showed unimodal curve under 24%,50% and 85% shading treatments. Shading reduced the content of anthocyanins in Prunus serrulata Libdl. ‘Royal Burgundy＇leaves,so it should avoid shading as a garden foliage plant.

关 键 词：红叶樱花 遮阴 光合特性 叶绿素荧光 

分 类 号：S685.99[农业科学—观赏园艺]