不同冬小麦品种(系)叶绿素荧光差异分析

Analysis on Chlorophyll Fluorescence of Flag Leaves for Different Winter Wheat Varieties

为了了解不同冬小麦品种光合作用微观机理差异,为华北地区高光效冬小麦品种筛选提供理论依据,对7个冬小麦品种(系)的旗叶叶绿素a荧光参数和叶绿素含量差异用LI-6400便携式光合测定系统和分光光度计法分别进行了测定分析。结果表明,不同品种间叶绿素a荧光参数(Fo、Fm、Fv/Fm、Fs、qP、qN、ΨPS 等)存在较大差异,导致叶片及作物群体光能利用率、光合作用速率、产量产生差异。试验结果进一步显示:(1)科农9204、高优503和石4185的光能利用率较高,而科农9204的产量最高,收获指数较大;(2)小麦产量和灌浆期旗叶的光能利用率有一定关系;(3)旗叶叶绿素含量在品种(系)间有一定差异,但其与产量之间没有相关关系。

In order to investigate the (differences) of (photosynthesis) micromechamisms of (different) (winter) wheat varieties and provide some theoretic base to assistant screening for high (photosynthetic) efficiency (winter) wheat varieties in North China, the changes of flag leaf (chlorophyll) content and (fluorescence) in the 7 (winter) wheat varieties (Dali2, Kenong 9204, 8901, Shi6365, (Gaoyou) 503, Shi 4185, Lai3279) were measured by the LI-6400 Portable Photosynthesis System and Spectro (photometer) (710) during the (grain-filling) periods. The results showed that: (1) The light (energy) use efficiency of Kenong 9204, (Gaoyou) 503 and Shi 4185 were higher than others;(2) The (relationships) (between) yield and the light (energy) use efficiency was significant;(3) The (chlorophyll) content of (different) varieties was (different) and the (relationship) (between) it and yield was not significant. (According) to the (difference) of the (photosynthesis) characteristics, the analysis showed that: The (chlorophyll) (fluorescence) (parameters) (Fo, Fm, Fv/Fm, Fs, qP, qN, Ψ_(PSⅡ), etc.) had greater (differences) among (different) varieties, which caused (difference) of the wheat leaf and crop colonys light (energy) utilization (ratio), speed of (photosynthesis) and yield. Winter wheat flag leaf (photosynthesis) function was stronger, which could improve (photosynthesis) (systematic) activity and (photochemistry) efficiency most of PSⅡ, increased the proportion of PSⅡ open (part), (photosynthesis) (electrons) transmission speed and the total (photochemistry) quantum yield of PSⅡ, but (reduced) the (dissipation) that is not the radiation (energy). The light (energy) (absorbed) by the blade was fully used for the (photosynthesis), which could help (winter) wheat form seeds and get sufficient light (energy) during the (grain-filling) period. Using (fluorescence) dynamics method and carrying on (chlorophyll) (fluorescence) (difference) analysis to (different) (winter) wheat varieties could appraise and choose the variety of the high (photosynthesis) efficiency in terms of (microcosomic), which was a new way for the (optimum) seeking of the crop.