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    王菲, 尹伟伦, 夏新莉, 谢乾瑾. 空间条件对高羊茅SP1代形态及光合生理特性的诱变效应[J]. 北京林业大学学报, 2010, 32(3): 106-111.
    引用本文: 王菲, 尹伟伦, 夏新莉, 谢乾瑾. 空间条件对高羊茅SP1代形态及光合生理特性的诱变效应[J]. 北京林业大学学报, 2010, 32(3): 106-111.
    WANG Fei, YIN Wei-lun, XIA Xin-li, XIE Qian-jin. Mutagenic effect of aerospace on morphological and photosynthetic characteristics of tall fescue SP1.[J]. Journal of Beijing Forestry University, 2010, 32(3): 106-111.
    Citation: WANG Fei, YIN Wei-lun, XIA Xin-li, XIE Qian-jin. Mutagenic effect of aerospace on morphological and photosynthetic characteristics of tall fescue SP1.[J]. Journal of Beijing Forestry University, 2010, 32(3): 106-111.

    空间条件对高羊茅SP1代形态及光合生理特性的诱变效应

    Mutagenic effect of aerospace on morphological and photosynthetic characteristics of tall fescue SP1.

    • 摘要: 利用我国首颗航天育种卫星“实践八号”搭载高羊茅干种子,返地后研究了诱变当代种子萌发、外观形态和光合生理特性的变化。结果表明:经过太空诱变后,处理种子的发芽率及出苗率与对照相比无明显变化。处理植株的高度及叶片宽度显著增加,但分蘖数与叶片数无明显变化。同时筛选出2株具有矮秆、多分蘖、细叶等特点的突变体;对突变体进行的光合生理特性研究表明,突变体叶片单位面积的净光合速率、整株光合能力及蒸腾速率均高于对照,高光合速率、高蒸腾速率可能是导致突变体保持分蘖快速增加的原因之一。

       

      Abstract: Dry seeds of tall fescue (Festuca arundinacea), carried into space by China’s first seed-breeding satellite, were selected to investigate the germination, morphological and photosynthetic characteristics of the plants. The results show that after spaceflight mutation, the germination and emergence rates of seeds were not significantly different from that of control seeds. Plant height and leaf width increased significantly, while the number of tillers and leaves were not significantly different. Two dwarf mutants, M1 and M2 with more tillers and narrow leaves were isolated. The photosynthetic rate per unit leaf area, as well as the photosynthetic and transpiration rates of entire mutant plants were higher than those of the control. The improved ability of photosynthesis and higher transpiration may be one of the reasons that mutants can retain their high speed of tillering. 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