光质对草珊瑚幼苗生长及其生理生化基础的影响  

Effects of light quality on growth,and physiological and biochemical traits of Sarcandra glaba seedlings

作　　者：谢德金[1] 李静文 叶友杰 殷彪 任可 陈凌艳[2] 荣俊冬[1] 郑郁善[1,2] XIE De-jin;LI Jing-wen;YE You-jie;YIN Biao;REN Ke;CHEN Ling-yan;RONG Jun-dong;ZHENG Yu-shan(College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China;College of Landscape, Fujian Agriculture and Forestry University, Fuzhou 350002, China)

机构地区：[1]福建农林大学林学院,福建福州350002 [2]福建农林大学园林学院,福建福州350002

出　　处：《草业学报》2020年第8期104-115,共12页Acta Prataculturae Sinica

基　　金：福建省科技创新平台(2008Y2001)资助。

摘　　要：研究3种不同光质[白光(WL)、红光(RL)和蓝光(BL)]对草珊瑚幼苗的生长状态和相关生理生化指标的影响。选取不同光质处理下的草珊瑚幼苗,测定生长状态(株高、地径、总鲜重、总干重、根系形态指标、根冠比)和相关生理生化指标[叶绿素含量、可溶性蛋白含量、可溶性糖含量、还原糖含量、淀粉含量、丙二醛(MDA)含量、过氧化物酶(POD)活性、超氧化物歧化酶(SOD)活性、净光合速率(Pn)、最大光能利用率(LUEmax)、最大水分利用率(WUEmax)和最大光合效率(Fv/Fm)],并结合方差统计方法进行分析比较。在不同光质处理下,大部分试验指标均有显著差异,与白光和蓝光处理相比,红光除了能促进幼苗株高及WUEmax增加外,其他相关指标都显著减少;与白光相比,蓝光的根系各形态指标、根冠比、可溶性蛋白含量、MDA含量、POD活性、SOD活性、WUEmax等相关指标显著增加,其他指标都相应减小。红光处理能够促进草珊瑚幼苗的株高和WUEmax增加,但导致其他指标显著降低。蓝光处理不仅显著增加幼苗根系的各形态指标,而且提高了其最大水分利用率,结果可为利用LED光质调控技术提高草珊瑚幼苗的培育技术提供一定的理论基础。This research aimed to explore in detail the effects of three light regimes[white light(WL),red light(RL),and blue light(BL)]on growth status and physiological and biochemical traits of Sarcandra glaba seedlings.Measures of plant growth status conducted were:plant height,stem diameter,total fresh weight(roots and shoots),total dry weight(roots and shoots),root morphology indexes,and root∶shoot ratio.Physiological and biochemical traits measured included chlorophyll,solution protein,solution sugar,reducing sugar,and malondialdehyde(MDA)concentrations of leaf tissues;peroxidase(POD)and superoxide dismutase(SOD)activities,net photosynthetic rate(Pn),maximum light use efficiency(LUEmax),maximum water use efficiency(WUEmax)and maximum photosynthetic efficiency(Fv/Fm).Most of the measured traits showed differences between light regimes.Compared with WL and BL groups,the RL treatment resulted in a significant reduction in a majority of the measured traits.Exceptions were plant height and WUEmax which were increased in RL.Compared with the WL treatment,in the BL light regime,root morphology indexes,root∶shoot ratio,protein and MDA concentrations,POD and SOD activities and WUEmax were considerably increased,while other indexes were decreased.In this experiment,the RL treatment resulted in a significant decrease in many traits.Meanwhile,the BL regime not only stimulated root morphology indexes,but also improved WUEmax.This research lays a theoretical foundation for developing light quality guidelines for the cultivation of S.glaba seedlings.

关 键 词：草珊瑚 光质 生理生化指标 最大水分利用率 最大光能利用率 最大光合效率 

分 类 号：R28[医药卫生—中药学]