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首页> 外文期刊>Polar biology >Germinating seeds or bulbils in 87 of 113 tested Arctic species indicate potential for ex situ seed bank storage
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Germinating seeds or bulbils in 87 of 113 tested Arctic species indicate potential for ex situ seed bank storage

机译：在113个经过测试的北极物种中，有87种的种子或球茎发芽表明其易位种子库的存储

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摘要

Arctic plant species are expected to lose range due to climate change. One approach to preserve the genetic and species diversity for the future is to store propagules in seed vaults. However, germinability of seeds is assumed to be low for Arctic species. We evaluated ex situ storage potential of 113 of the 161 native angiosperms of Svalbard by studying seed ripening and germination. Seeds or bulbils were collected, and germinability was tested after one winter of storage in the Svalbard Global Seed Vault. Twenty-six of the species did not produce ripe propagules, 8 produced bulbils, and 79 produced seeds. Bulbils sprouted to high percentages. Seeds of 10 species did not germinate, 22 had low germination (<20 %), 34 had germination of 21-70 %, and 13 had high germination percentages (>70 %). More than 70 % of the species belonging to Asteraceae, Brassicaceae, Caryophyllaceae, Juncaceae, Rosaceae, and Saxifragaceae germinated. Cold tolerant, common species had higher germination percentages than relatively thermophilous, rare species. Germination percentages were six times higher than observed in 1969 (n = 51) and 0.7 times that observed in 2008 (n = 22), indicating that recent climate warming improves germination in the Arctic. While in situ conservation is of vital importance, ex situ conservation in seed banks is a potential complementary conservation strategy for the majority of Arctic vascular plant species. For species that did not germinate, other methods for ex situ conservation should be sought, for example, growing in botanical gardens.
机译：由于气候变化，预计北极植物物种将失去范围。将来保存遗传和物种多样性的一种方法是将繁殖体存储在种子库中。但是，对于北极物种而言，种子的可发芽性较低。通过研究种子的成熟和发芽，我们评估了161个斯瓦尔巴特群岛被子植物中113个的异位贮藏潜力。在斯瓦尔巴特全球种子库中储存一个冬天后，收集种子或球茎，并测试其可发芽性。该物种中有26个没有产生成熟的繁殖体，有8个产生了球茎，有79个产生了种子。臭鼬萌芽率很高。 10种种子不发芽，22种发芽率低（<20％），34种发芽率在21-70％之间，13种发芽率高（> 70％）。属于菊科，十字花科，石竹科，菊科，蔷薇科和虎耳草科的70％以上的物种发芽了。耐冷的常见物种比相对耐热的稀有物种具有更高的发芽率。发芽率是1969年（n = 51）的六倍，是2008年（n = 22）的0.7倍，表明近期的气候变暖改善了北极的发芽。尽管就地保护非常重要，但种子库中的就地保护是大多数北极维管植物物种的潜在补充保护策略。对于未发芽的物种，应寻求其他异地保护方法，例如在植物园中生长。

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  • 来源
    《Polar biology》 |2013年第6期|819-830|共12页
  • 作者

    Inger Greve Alsos; Eike Muller; Pernille Bronken Eidesen;

  • 作者单位

    Troms0 University Museum, 9037 Troms0, Norway,The University Centre in Svalbard, Post Office Box 156,9171 Longyearbyen, Norway;

    The University Centre in Svalbard, Post Office Box 156,9171 Longyearbyen, Norway,Department of Arctic and Marine Biology,Faculty of Biosciences, Fisheries and Economics,University of Troms0, 9037 Troms0, Norway;

    The University Centre in Svalbard, Post Office Box 156,9171 Longyearbyen, Norway;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    arctic; bulbils; conservation; seed germination; rare; red list;

    机译：北极;球茎保护;种子发芽罕见;红名单;

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