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The effect of snow cover on the phenology of the moss Racomitrium lanuginosum

机译：雪覆盖对苔藓脱硝基吡喃糖素候选的影响

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摘要

We investigated the seasonality of the development of gametangia and sporophytes of Racomitrium lanuginosum at a snow-free site (ca. 645 m on Mt. Mihara) and compared it with a seasonally snow-covered site (ca. 2200 m on Mt. Fuji) to clarify the effects of the length of growth period regulated by snow cover. The number of inflorescences and the number, size and developmental stages of male and female gametangia and sporophytes were recorded once every month from March 2014 to February 2015. At the snow-free site, archegonia rapidly developed in spring, but antheridia took longer to develop from the late summer; sperm dispersal mainly occurred in winter. Spore dispersal occurred from winter to summer and fertilization occurred in spring. Some notable phenological patterns were observed at the snow-free site, such as the discordance of the timing of maturation between male and female gametangia, and the occurrence of spore dispersal in winter. These results suggest that the snow-free site is close to the limit of successful sexual reproduction and that snow cover is an essential factor to maintain the phenological patterns of this species.
机译：我们调查了在无雪地（CA.Mihara在MIHARA）的无雪地（CA.645米）的胰岛植物植物植物的发展的季节性，并将其与季节性雪花覆盖的网站进行比较（CA.2200 M在MT.FJI。 ）阐明通过雪覆盖调节的生长期长度的影响。男性和雌性沙漠和孢子体的数量和数量，大小和发育阶段的数量每月从2014年3月到2015年2月记录一次。在无雪地，春天迅速发展，但又花了更长时间的发展来自夏末;精子分散物主要发生在冬季。孢子分散在冬季发生到夏季，春季发生施肥。在无雪地观察到一些显着的酚醛解样观，例如阳性和雌性Gametangia之间成熟的时间和冬季孢子分散的发生的不安。这些结果表明，无雪地场接近成功的性繁殖的极限，雪覆盖是维持该物种的酚类模式的必要因素。

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