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首页> 外文期刊>Animal Production Science >Seed development in Malva parviflora: onset of germinability, dormancy and desiccation tolerance
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Seed development in Malva parviflora: onset of germinability, dormancy and desiccation tolerance

机译：小花锦葵种子的发育：可萌芽，休眠和干燥耐性的开始

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摘要

Seed development was examined in Malva parviflora. The first flower opened 51 days after germination; flowers were tagged on the day that they opened and monitored for 33 days. Seeds were collected at 12 stages during this period and used to determine moisture content, germination of fresh seeds and desiccation tolerance (seeds dried to 10% moisture content followed by germination testing). Seed moisture content decreased as seeds developed, whereas fresh (max. 296 mg) and dry weight (max. 212 mg) increased to peak at 12–15 and ~21 days after flowering (DAF), respectively. Therefore, physiological maturity occurred at 21 DAF, when seed moisture content was 16–21%. Seeds were capable of germinating early in development, reaching a maximum of 63% at 9 DAF, but germination declined as development continued, presumably due to the imposition of physiological dormancy. Physical dormancy developed at or after physiological maturity, once seed moisture content declined below 20%. Seeds were able to tolerate desiccation from 18 DAF; desiccation hastened development of physical dormancy and improved germination. These results provide important information regarding M. parviflora seed development, which will ultimately improve weed control techniques aimed at preventing seed set and further additions to the seed bank.
机译：在小花锦葵中检查了种子发育。发芽后51天，第一朵花开了。花朵在开放和监测33天的那天被标记。在此期间的12个阶段收集种子，并用于确定水分，新鲜种子的发芽和耐干燥性（将种子干燥至10％的水分含量，然后进行发芽测试）。种子含水量随着种子的发育而降低，而新鲜（最大296 mg）和干重（最大212 mg）分别在开花后12-15天和〜21天（DAF）达到峰值。因此，当种子含水量为16–21％时，生理成熟发生在21 DAF。种子能够在发育早期发芽，在9 DAF时最高达到63％，但是发芽随着发育的继续而下降，这大概是由于施加了生理休眠。一旦种子含水量下降到20％以下，生理休眠就会在生理成熟期或生理成熟后发生。种子能够耐受18 DAF的干燥作用；干燥加速了身体休眠的发展并改善了发芽。这些结果提供了有关小果分支杆菌种子发育的重要信息，这将最终改善旨在防止结实和进一步增加种子库的杂草控制技术。

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  • 来源
    《Animal Production Science》 |2007年第6期|p.683-688|共6页
  • 作者

    Pippa J. Michael A B D Kathryn J. Steadman C and Julie A. Plummer B;

  • 作者单位

    A Muresk Institute, Division of Science and Engineering, Curtin University of Technology, Northam, WA 6401, Australia. B School of Plant Biology, Faculty of Natural and Agricultural Sciences, University of Western Australia, Crawley, WA 6009, Australia. C School of Pharmacy, Faculty of Health Sciences, University of Queensland, St Lucia, Qld 4072, Australia. D Corresponding author. Email: p.michael@curtin.edu.au;

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  • 正文语种 eng
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  • 关键词

    Malvaceae, small-flowered mallow.;

    机译：锦葵科;小花锦葵。;

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