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Effect of blue light on early sporophyte development of Saccharina japonica (Phaeophyta)

机译：蓝光对Saccharina japonica（Phaeophyta）早期孢子体发育的影响

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摘要

Growth and photosynthesis in the blade of Saccharina sporophytes are strongly stimulated by blue light. However, little is known about the effect of blue light on the early development and longitudinal photosynthesis profile of Saccharina sporophytes. In this study, S. japonica sporelings were cultured under blue or red light for 8 weeks. Blue light affected longitudinal, tangential cell divisions and tissue differentiation early in sporophyte development. The number of latitudinal cells in the blade under blue light was over fivefold that under red light. In addition, the number of cell layers was higher in the growing point than in the blade under blue light, whereas sporelings grown under red light contained only a single cell layer. Under blue light, the photosynthetic capacities of the growing region, blade and stipe were similar, and the maximum relative electron transport rate was even lower in the growing point than in the blade. The longitudinal photosynthesis profile suggested that blue light stimulated the enzymes participating in light-independent carbon fixation in the growing point and accordingly was less dependent on high light irradiances. Collectively, the results indicated that blue light promotes the early development of S. japonica sporophytes, which was attributed to both photomor-phogenetic responses and photosynthetic reactions.
机译：蓝光强烈刺激了Saccharina孢子体叶片的生长和光合作用。然而，关于蓝光对Saccharina sporophytes的早期发育和纵向光合作用的影响知之甚少。在这项研究中，日本粳稻孢子在蓝色或红色光下培养了8周。蓝光影响孢子体发育的早期纵向，切向细胞分裂和组织分化。蓝光下叶片中的横向细胞数量是红光下的五倍。另外，在蓝光下，生长点的细胞层数高于叶片，而在红光下生长的孢子仅包含单个细胞层。在蓝光下，生长区域，叶片和柄的光合作用能力相似，并且最大相对电子传输速率在生长点甚至比叶片低。纵向光合作用曲线表明，蓝光在生长点刺激了参与不依赖光的碳固定的酶，因此对高光辐射的依赖性较小。总体而言，结果表明，蓝光促进了日本粳稻孢子体的早期发育，这归因于光致光遗传反应和光合作用反应。

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  • 来源
    《Marine biology》 |2010年第8期|P.1811-1817|共7页
  • 作者

    Wen-Jun Wang; Xiu-Tao Sun; Fei-Jiu Wang;

  • 作者单位

    Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 266071 Qingdao, China;

    rnYellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 266071 Qingdao, China;

    rnYellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 266071 Qingdao, China;

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