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首页> 外文期刊>european journal of phycology >The reproductive phenology ofDelesseria sanguineaandOdonthalia dentataoff the Isle of Man
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The reproductive phenology ofDelesseria sanguineaandOdonthalia dentataoff the Isle of Man

机译：马恩岛的Delesseria sanguinea和Odonthalia dentata的生殖物候

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Samples of individual plants ofDelesseria sanguineaandOdonthalia dentatawere collected from shallow subtidal populations off the south end of the Isle of Man during the reproductive season. Reproductive bladelets were measured and their state of fertility noted. InDelesseria, male bladelets appeared in early September and achieved maximum size in mid October when bladelets of all sizes became fertile; the largest of these dehisced first and all were spent by mid December. Females appeared 3 weeks later; carpogonia were fertilized during October but carpospores were not released until about February when maximum bladelet length was reached. In about half the bladelets carpogonia remained unfertilized and did not grow further and only 40 of successful fertilizations resulted in carpospore release. Tetrasporangial bladelets did not appear until November and tetraspores were released in January and February while bladelets were still growing. Gametophytes and tetrasporophytes existed in about equal numbers. InOdonthalia, all three types of bladelet appeared in early November and fertilization took place in December, but later-developing carpogonia seemed to remain unfertilized in spite of a second wave of production of spermatangia, resulting in a low fertilization success of about 7. Both carpospores and tetraspores dehisced from January to April. In this species the gametophytes formed about 58 of the population, a proportion expected from equal survival of number of spores per parent.
机译：在繁殖季节，从马恩岛南端的浅潮下带种群中采集了Delesseria sanguinea和Odonthalia dentata的单个植物样本。测量生殖叶片并记录其生育状态。在Delesseria中，雄性叶片在9月初出现，并在10月中旬达到最大尺寸，此时各种大小的叶片都变得可育;其中最大的一个首先裂开，所有在12月中旬都用完了。雌性在3周后出现;carpogonia在10月受精，但直到2月左右达到最大叶片长度时才释放carpospors。在大约一半的叶片中，carpogonia仍未受精，没有进一步生长，只有40%的成功受精导致carpospopos释放。四孢子囊叶片直到11月才出现，四孢子在1月和2月释放，而叶片仍在生长。配子体和四孢子体的数量大致相等。在Odonthalia中，所有三种类型的叶片都在11月初出现，并在12月进行受精，但尽管产生了第二波精子，但后来发育的carpogonia似乎仍未受精，导致受精成功率低至约7%。1-4月，果孢子和四孢子均裂开。在该物种中，配子体约占种群的58%，这一比例预计来自每个亲本孢子数量的相同存活。

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