首页> 外文期刊>Nature >After a dozen years of progress the origin of angiosperms is still a great mystery
【24h】

After a dozen years of progress the origin of angiosperms is still a great mystery

机译:经过十几年的发展,被子植物的起源仍然是一个巨大的谜团

获取原文
获取原文并翻译 | 示例
           

摘要

Here we discuss recent advances surrounding the origin of angiosperms. Putatively primitive characters are now much better understood because of a vastly improved understanding of angiosperm phylogenetics, and recent discoveries of fossil flowers have provided an increasingly detailed picture of early diversity in the angiosperms. The 'anthophyte theory', the dominant concept of the 1980s and 1990s, has been eclipsed; Gnetales, previously thought to be closest to the angiosperms, are related instead to other extant gymnosperms, probably most closely to conifers. Finally, new theories of flower origins have been proposed based on gene function, duplication and loss, as well as on morphology. Further studies of genetic mechanisms that control reproductive development in seed plants provide a most promising avenue for further research, including tests of these recent theories. Identification of fossils with morphologies that convincingly place them close to angiosperms could still revolutionize understanding of angiosperm origins.
机译:在这里,我们讨论有关被子植物起源的最新进展。由于对被子植物系统发生学的了解得到了极大的改善,现在推测的原始字符得到了更好的理解,而化石花的最新发现为被子植物的早期多样性提供了越来越详细的信息。 1980年代和1990年代占主导地位的概念“古生菌理论”已经黯然失色。以前被认为最接近被子植物的Gnetales与其他现存的裸子植物有关,可能与针叶树最接近。最后,基于基因功能,复制和丢失以及形态学,提出了新的花起源理论。控制种子植物生殖发育的遗传机制的进一步研究为进一步的研究提供了最有希望的途径,包括对这些最新理论的检验。以令人信服地将其置于被子植物附近的形态鉴定化石,仍可能会彻底改变对被子植物起源的理解。

著录项

  • 来源
    《Nature》 |2007年第7173期|p.1184-1189|共6页
  • 作者单位

    Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号