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首页> 外文期刊>Seed Science Research >Morphophysiological dormancy in seeds of Convallaria keiskei and a proposal to recognize two types of double dormancy in seed dormancy classification
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Morphophysiological dormancy in seeds of Convallaria keiskei and a proposal to recognize two types of double dormancy in seed dormancy classification

机译：铃兰种子的形态生理休眠和在种子休眠分类中识别两种类型的双重休眠的建议

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Convallaria majalis has double dormancy and hypogeal germination, but no information is available on embryo growth or on the effects of light and gibberellic acid (GA(3)) on germination in this genus. Therefore, we investigated embryo growth and other germination features in seeds of Convallaria keiskei and compared the data with those of Trillium camschatcense in another study. Until now, in seeds with double dormancy, embryo growth and germination (epigeal) have been studied in detail only for seeds of Trillium camschatcense. Phenology of embryo growth and emergence of cotyledonary petiole/root (hereafter root) and shoot in seeds of Convallaria keiskei were monitored outdoors. Effects of temperature, light and GA(3) on embryo growth and root and shoot emergence were tested under laboratory conditions. Roots emerged the first spring following seed dispersal in autumn. The embryo grew soon after root emergence, and germination was hypogeal. Seeds with an emerged root formed buds from which a shoot (leaf) emerged above ground during the second spring. Alternating temperatures and light had negative effects on root emergence, and GA(3) did not substitute for cold stratification in root emergence. Seeds of Convallaria keiskei have double dormancy, but it differs from that in Trillium camschatcense. Based on differences in embryo growth before (Trillium camschatcense) versus after (Convallaria keiskei) root emergence, and on epigeal (Trillium camschatcense) versus hypogeal (Convallaria keiskei) germination, we suggest that two types of deep simple double morphophysiological dormancy (MPD) be recognized. Since embryo growth in Convallaria keiskei does not fit the standard definition of MPD, we propose to expand this definition.
机译：铃兰具有双重休眠和低胚芽萌发，但尚无有关胚胎生长或光和赤霉素（GA（3））对该属发芽的影响的信息。因此，我们调查了铃兰种子中的胚芽生长和其他发芽特征，并在另一项研究中将其与延龄草的数据进行了比较。迄今为止，在具有双重休眠的种子中，仅对延龄草的种子进行了详细的胚胎生长和发芽（上生）研究。在户外监测铃兰铃兰种子生长和子叶叶柄/根（以下称根）的萌发以及胚芽的物候现象。在实验室条件下测试了温度，光照和GA（3）对胚胎生长以及根和芽萌发的影响。在秋季种子扩散后的第一个春天就出现了根。胚根出苗后不久就生长了，发芽是hypogeal。在第二个春季，具有发芽根的种子形成芽，芽（叶）从芽上露出地面。交替的温度和光照对根出苗有负面影响，GA（3）不能替代根出苗中的冷分层。铃兰的种子具有双重休眠，但不同于延龄草。基于（Trillium camschatcense）和（Convallaria keiskei）根出苗前的胚芽生长差异，以及表皮（Trillium camschatcense）与次生（Convallaria keiskei）萌发的胚芽差异，我们建议将两种类型的深层简单双形态生理休眠（MPD）归类公认的。由于铃兰铃兰中的胚胎生长不符合MPD的标准定义，因此我们建议扩大该定义。

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