THE EVOLUTION OF BODY FORM IN BRYOPHYTES
THE EVOLUTION OF BODY FORM IN BRYOPHYTES
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DOI：
10.1002/9781118305881.ch2
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发表时间：
2013-01-01
期刊：
影响因子：
--
通讯作者：
Buck, William R.
中科院分区：
文献类型：
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作者：
Goffinet, Bernard;Buck, William R.
苔藓植物是陆地植物的一个并系群，它标志着植物向陆地的成功过渡，并为具有高度分化的维管组织和多孢子囊的植物的进化铺平了道路。像所有的胚胎植物一样，芽苞植物遵循交替的单倍体和二倍体世代的生活周期，因此，依赖于相同的基本遗传工具来发育它们的身体。芽抱子植物的营养体通常是有性配子体，受精后，胚发育成一个短命的、不分枝的孢子体，仍然附着在母体植物上。在过去的4亿年里，britectes经历了持续的，有时是快速的多样化，导致近20000个物种展示了广泛的营养结构，基于简单的模块化Bauplan和关键的创新，通过时间和空间增强孢子传播，从而确保它们的持久性和生态成功。
Bryophytes compose a paraphyletic group of land plants that mark the successful transition to land and paved the way for the evolution of plants with highly differentiated vascular tissues and multiple sporangia. Like all embryophytes, bryophytes follow a life cycle of alternating haploid and diploid generations, and hence, rely on the same fundamental set of genetic tools to develop their body. The vegetative plant of bryophytes is always the sex-bearing gametophyte, and upon fertilization, the embryo develops into a short-lived, unbranched sporophyte that remains attached to the maternal plant. Over the last 400 million years, bryophytes have undergone continuous and sometimes rapid diversification, leading to nearly 20 000 species exhibiting a broad range of vegetative architecture based on a simple modular Bauplan and critical innovations enhancing spore dispersal through time and space, and thereby insuring their persistence and ecological success.