摘要
为了探讨毛竹Phyllostachys edulis在快速生长期(前期、中期、后期)叶片的叶绿素荧光特征,在浙江农林大学毛竹生理生态监测定位站利用PAM-2100型叶绿素荧光仪,在毛竹快速生长期测定叶片的叶绿素荧光参数并对其荧光特性进行综合评价。结果表明:毛竹叶片的叶绿素荧光参数在毛竹快速生长的前期、中期、后期变化显著。在不同生长期中,同一年龄的毛竹的光系统Ⅱ(PSⅡ)实际光化学量子产量(Yield),PSⅡ最大光化学效率(Fv/Fm),PSⅡ潜在光化学效率(Fv/Fo)均表现为前期<中期<后期,差异达到显著水平(P<0.05)。其中Fv/Fm变化范围为0.672~0.773,Fv/Fo变化范围为2.068~3.231。在毛竹快速生长的前期和中期低于正常水平。非光化学猝灭系数(qNP)表现为中期<后期<前期,差异达显著水平(P<0.05)。在毛竹快速生长的不同时期,毛竹叶片qNP均呈现明显的日变化。综合比较表明,随着毛竹的快速生长,毛竹叶片光合作用能力呈上升趋势。
To explore chlorophyll fluorescence characteristics of a Phyllostachys edulis blade during its fast growth period（early, middle, and late phases）, parameters concerning chlorophyll fluorescence of a Ph. edulis blade were measured using PAM-2100 chlorophyll fluorescence spectrometer during its fast growth period of the Bamboo Physiological and Ecological Monitoring Station of Zhejiang AF University, also comprehensive evaluation of its fluorescence characteristics was then conducted. The results showed that the actual photochemical quantum yield of Photosystem Ⅱ（PS-Ⅱ）, the maximal photochemical efficiency of PS-Ⅱ（Fv/Fm）,and the potential PS-Ⅱ activity for same-aged Ph. edulis samples had significant differences within different stages of the rapid growth period（P0.05） going from a lower level to a higher level for the early phase, the middle phase, and the latter phase. Variation in the Fv/Fmratio was 0.672-0.773 and in the Fv/Foratio was2.068-3.231. During the fast grwoth period, the value of Non-photochemical Quenching（qNP） in the order：middle phase late phase early phase. The qNPvalue also showed strong daily variation during different phases of the fast growth period. Chlorophyll fluorescence parameters of bamboo blade show significant changes during its fast growth period. Thus, as indicated by the comprehensive comparison, photosynthesis of the Ph.edulis blade showed an increasing tendency during its rapid growth.
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2018年第1期75-80,共6页
Journal of Zhejiang A&F University
基金
国家自然科学基金资助项目(31270497
31570686)
浙江省与中国林业科学研究院省院合作项目(2014SY16)
关键词
植物学
毛竹
快速生长期
叶绿素荧光
botany
Phyllostachys edulis
fast growth period
chlorophyll fluorescence
