遮荫对四季草莓叶绿素荧光特性的影响  

Effects of shading on the chlorophyll fluorescence parameters of Fragaria vesca cv. 'Selva' and 'Midlight'

作　　者：罗华[1] 冯立娟[2] 李敏[1] 张连忠[1] 

机构地区：[1]山东农业大学园艺学院,作物生物学国家重点实验室,山东泰安271018 [2]山东省果树研究所,山东泰安271000

出　　处：《河北农业大学学报》2012年第5期25-28,44,共5页Journal of Hebei Agricultural University

基　　金：山东省教育厅科技计划项目(JOTYF01)

摘　　要：以四季草莓(Fragaria ananassa Duchesne)‘赛娃’(‘Selva’)和‘美德莱特’(‘Midlight’)为试材,研究遮荫(透光率约30%)对四季草莓叶绿素荧光特性的影响。结果表明:遮荫处理显著提高了2个草莓品种叶片的叶面积及叶绿素a、b含量、叶绿素总量、叶绿素/类胡萝卜素值,类胡萝卜素含量变化不显著;遮荫降低了叶片Fo值,提高了Fv/Fm值与ΦPSII,表明遮荫后草莓叶片叶绿素分子捕获激发能的效率提高,减少了光照对PSII光化学反应中心的破坏,体现出叶片对光能利用率的提高和对遮荫环境的适应。遮荫提高了ETR,ETR日变化呈双峰曲线,峰值分别出现在10:00和14:00左右。遮荫提升了qP,降低了NPQ,NPQ的变化曲线与qP相反。四季草莓对弱光环境有一定的适应能力,中午时段(10:00-14:00)适度遮荫能减弱光照对四季草莓的光抑制,提高草莓对光能的利用能力。Effects of shading（about 30~ light transmittance） on the chlorophyll fluorescence parameters of seasonal strawberry cultivars were studied taking Fragaria vesca cv. ＇Selva~ and ＇Midlight^as materials. The results showed that shading condition significantly increased the single leaf area and the content of chlorophyll a, b, a＋b, chlorophyll/carotenoids ratio, and the content of carotenoids did not changed significantly. It decreased Fo, and increased F,/Fm and φsⅡ. It demonstrated that it can improve the efficiency of chlorophyll molecules capturing excitation and reduce the destruction of light on PSII photochemical reaction center. So it showed the improvement of increasing utilization ratio of light energy and adaption to shade en- vironment. Shading increased ETR, and the diurnal changes of ETR showed a two-peak curve. Peaks emerged at 10.00 and 14：00. Shading increased qP, decreased NPQ. Its curve was op posed to qP. Seasonal strawberry had certain ability to adapt to low light environment. Appro priate shading at noon time （10.00 -14.00） could weaken photoinhibition of seasonal strawber ry and improve the utilization of light energy.

关 键 词：遮荫 四季草莓 叶绿素荧光 色素 

分 类 号：S512.1[农业科学—作物学]