Seed dormancy of northern landscaping plants requiring two winters from seed dispersal to shoot emergence above ground.

北方园林植物的种子休眠需要两个冬天，从种子传播到地面上出现芽。

• 批准号: 23580028
• 负责人: KONDO Tetsuya
• 金额: $ 3.49万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23580028/
• 关键词: 種子; 休眠; スズラン; マイヅルソウ; 種子発芽; 胚生長; MPD; double dormancy; 光; 温度; 胚成長; 発根; 出芽

We revealed the germination characteristics of seeds of Convallaria keiskei and Maianthemum dilatatum, which are promising species as landscape materials in northern Japan, by laboratory and outdoor experiments. In both species, seeds were dispersed in October outdoors, roots emerged from seeds in next June or July, and shoot emerged in May two years later of seed dispersal. This means seeds require about 20 months including two winter from seed dispersal to shoot emergence. Embryos in seeds immediately after dispersal were small and developed at the almost coincidentally with root emergence from seeds functioning as haustorium absorbing nutrition from endosperm. In both seeds, percentages of radicle emergence increased by cold stratification but alternating temperatures and light inhibit them.

通过室内和室外实验，揭示了日本北方有希望作为园林材料的铃兰（Convallaria keiskei）和麦穗草（Maillaumaceratum）种子的萌发特性。两种植物种子在10月份在室外散布，6 ~ 7月份从种子中生根，2年后5月份出现新梢。这意味着种子需要大约20个月，包括两个冬天，从种子传播到芽的出现。种子中的胚在传播后立即发育，几乎与种子中的根同时出现，起吸器的作用，从胚乳中吸收营养。在这两种种子中，胚根出现的百分比增加冷层积，但交替的温度和光照抑制他们。

项目成果

マイヅルソウ（Maianthemum dilatatum）種子の発芽フェノロジーと発根に及ぼす温度と光の影響

温度和光照对舞花种子发芽物候及生根的影响

• 发表时间: 2011
• 作者: 高橋亘;高溝正;鄭亜紀子・斎藤達也・近藤哲也;鄭亜紀子・斎藤達也・近藤哲也
• 通讯作者: 鄭亜紀子・斎藤達也・近藤哲也

マイヅルソウ(Maianthemum dilatatum)種子の発芽フェノロジーと発根に及ぼす温度と光の影響

温度和光照对舞花种子发芽物候及生根的影响

• 发表时间: 2011
• 作者: 高橋亘;高溝正;鄭亜紀子・斎藤達也・近藤哲也
• 通讯作者: 鄭亜紀子・斎藤達也・近藤哲也