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园艺学报 ›› 2014, Vol. 41 ›› Issue (6): 1133-1144.

• 蔬菜 • 上一篇    下一篇

甘蓝叶色黄化突变体YL-1的光合生理特性及其叶绿体的超微结构

杨 冲,张扬勇*,方智远,刘玉梅,杨丽梅,庄 木,孙培田   

  1. (中国农业科学院蔬菜花卉研究所,北京 100081)
  • 收稿日期:2014-01-06 出版日期:2014-06-25 发布日期:2014-06-25

Photosynthetic Physiological Characteristics and Chloroplast Ultrastructure of Yellow Leaf Mutant YL-1 in Cabbage

YANG Chong,ZHANG Yang-yong*,FANG Zhi-yuan,LIU Yu-mei,YANG Li-mei,ZHUANG Mu,and SUN Pei-tian   

  1. (Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China)
  • Received:2014-01-06 Online:2014-06-25 Published:2014-06-25

摘要: 以甘蓝叶色黄化突变体‘YL-1’及其叶色正常近等基因系‘WT708’为试材,对比发现:‘YL-1’从子叶期开始表现出叶色黄化现象,并一直持续整个生活周期,叶片小,植株矮小,可以结球,但生长势和叶球显著小于‘WT708’,单球质量只有‘WT708’的39.0%;光合色素含量显著降低;叶绿体数较少,叶绿体内部基粒数少,基粒片层垛叠数少,基粒排列不整齐;‘YL-1’的FoFmFv /FmFo′、Fv′/Fm′、ФPSⅡQPQNETR均显著低于‘WT708’,说明光合色素含量的降低导致了PSⅡ反应中心捕光能力和光化学转化效率的降低。随着温度的降低,‘YL-1’与‘WT708’之间的光合色素含量差异逐渐加大。

关键词: 甘蓝, 黄化突变体, 光合色素含量, 超微结构, 叶绿素荧光参数

Abstract: Yellow leaf cabbage mutant(‘YL-1’)and its near isogenic line‘WT708’were used to compare their difference. Mutant‘YL-1’showed yellow leaf phenotype from cotyledon stage and existed throughout the life cycle. Compared with‘WT708’,‘YL-1’had smaller leaves and less plant height. The head height of‘YL-1’was 39.0% of‘WT708’. The photosynthetic pigment content in‘YL-1’leaves was significantly lower than that in‘WT708’.‘YL-1’had fewer chloroplasts and base grains,less grana lamellae stacked pile and irregular arrangement of base grains. The chlorophyll fluorescence parameters FoFmFo′,Fv/FmFv′/Fm,ФPSⅡQPQN and ETR in‘YL-1’were significantly lower than those in‘WT708’. Lower photosynthetic pigment content leads to the lower light-harvesting capacity and photochemical conversion efficiency of the PSⅡreaction center. As temperature decreased,the difference of photosynthetic pigment content between‘YL-1’and‘WT708’gradually increased.′

Key words: Brassica oleracea L. var. capitata, chlorophyll-reduced mutant, photosynthetic pigment

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