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首页> 外文期刊>Ecological research >Seed dormancy and germination in the giant Himalayan lily [Cardiocrinum giganteum var. giganteum): an assessment of its potential for naturalization in northern Japan
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Seed dormancy and germination in the giant Himalayan lily [Cardiocrinum giganteum var. giganteum): an assessment of its potential for naturalization in northern Japan

机译：喜马拉雅大百合[Cardiocrinum giganteum var。 giganteum）：对其在日本北部的归化潜力的评估

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摘要

Understanding the potential for ornamental plant species to become naturalized in a nonnative habitat requires information on seed germination in order to help predict responses of the species to the natural environmental conditions of its «ew habitat. Cardiocrinum giganteum var. giganteum, which is native to the Himalayas, has been introduced as an ornamental plant in temperate regions of the world, and was categorized recently as invasive in New Zealand. Seed germination requirements of the species were determined under natural conditions in Hokkaido, Japan, to assess its potential to become naturalized in this region of Japan. Mature seeds were collected from its native range in the Indian Himalayas. At maturity in autumn, seeds had underdeveloped embryos, which grew in the second autumn and winter after exposure to summer temperatures. Radicles and cotyledons emerged in late winter and spring. Thus, an 18-19 month period was required from dispersal to seed germination. Under laboratory conditions, this period could be shortened to 10-11 months in a 25/15 ℃ (120 days) → 15/5 ℃ (90 days) → 0 ℃ (90 days) → 15/5 ℃ (60 days) temperature sequence. GA)_3 did not substitute for the above temperature requirements. These temperature requirements for seed germination of C. giganteum var. giganteum are very similar to those of its native Japanese congener C. cor datum var. glehnii. Seeds of both taxa have deep simple morphophysiological dormancy. The close similarity in the requirements for regeneration from seeds of the two taxa suggests that the seed stage of the life cycle is not an impediment to the naturalization of the giant Himalayan lily in northern Japan.
机译：要了解观赏植物物种在非本地生境中被自然化的潜力，就需要有关种子发芽的信息，以便帮助预测该物种对其“生境”的自然环境条件的反应。巨型心形变种gigantum原产于喜马拉雅山，已在世界温带地区被引入为观赏植物，最近在新西兰被归类为入侵植物。在日本北海道的自然条件下确定了该物种的种子萌发要求，以评估其在日本该地区的归化潜力。成熟的种子是从印度喜马拉雅山的原生地收集的。在秋季成熟时，种子的胚发育不佳，在暴露于夏季温度后的第二个秋季和冬季生长。胚根和子叶在冬末和春季出现。因此，从扩散到种子发芽需要18-19个月的时间。在实验室条件下，在25/15℃（120天）→15/5℃（90天）→0℃（90天）→15/5℃（60天）温度下，此时间可缩短至10-11个月序列。 GA）_3不能替代上述温度要求。这些温度要求对于C. giganteum var。 giganteum与它的日本本土同类C. cor datum var非常相似。格列尼两种分类单元的种子都具有很深的简单形态生理休眠。从这两个类群的种子再生的需求方面非常相似，这表明生命周期的种子阶段并不妨碍日本北部喜马拉雅百合的自然化。

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  • 来源
    《Ecological research》 |2012年第4期|p.677-690|共14页
  • 作者

    Shyam S. Phartyal; Tetsuya Kondo; Carol C. Baskin; Jerry M. Baskin;

  • 作者单位

    Environmental Horticulture and Landscape Architecture, Graduate School of Agriculture, Hokkaido University, Sapporo, Hokkaido 060-8589, Japan,Department of Forestry and Natural Resource, School of Agriculture and Allied Science, H.N.B. Garhwal (Central) University, Post Box 59,Srinagar-Garhwal 246174 UK, India;

    Environmental Horticulture and Landscape Architecture, Graduate School of Agriculture, Hokkaido University, Sapporo, Hokkaido 060-8589, Japan;

    Department of Biology, University of Kentucky, Lexington, KY 40506, USA,Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40506, USA;

    Department of Biology, University of Kentucky, Lexington, KY 40506, USA;

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  • 正文语种 eng
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  • 关键词

    cardiocrinum giganteum; invasive species; morphophysiological dormancy; seed germination phenology; species naturalization;

    机译：巨型心io入侵物种;形态生理休眠种子发芽物候;物种归化;

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