• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >Integrated analysis of intraspecific diversity in the bipolar moss Roaldia revoluta (Mitt.) P.E.A.S. Camara & M. Carvalho-Silva (Bryophyta) in Antarctica
【24h】

Integrated analysis of intraspecific diversity in the bipolar moss Roaldia revoluta (Mitt.) P.E.A.S. Camara & M. Carvalho-Silva (Bryophyta) in Antarctica

机译：双极苔藓Roaldia Revoluta（MITT。）综合分析intrachectificatifity（MITT。）P.E.A.S. Camara＆M.Carvalho-Silva（苔藓）在南极洲

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The extreme conditions of life in Antarctica pose challenges to many organisms. Bryophytes comprise the main vegetation of the continent and they endure many adversities, thriving in an environment hostile to most living organisms. Mosses are known to exhibit phenotypic plasticity, due to genotypic heterogeneity, environmental influences, or a combination of both. We investigated morphological diversity and its possible relationship with genetic diversity in the Antarctic moss, Roaldia revoluta, and also if the geographic distribution of morphotypes was related with environmental variables. We obtained 49 samples from Antarctica, including King George Island (K), James Ross Island (J), and several locations in the Antarctic Peninsula (P), representing most of the habitats where this species is found. A principal component analysis (PCA) was performed using quantitative measures of gametophytic morphological characters. For molecular analyses, we used DNA sequences of five molecular markers obtained from 29 specimens. Canonical correspondence analysis (CCA) was carried out to compare morphological diversity with environmental variables. Our data support the existence of two morphotypes of R. revoluta, morphotype A (apiculate and ovate leaves), more frequent in K, and morphotype B (acuminate and more oblong leaves), more common in J. Both morphotypes were present in P. The distinct morphotypes could not be related with genetic heterogeneity, since no sequence differences were found in any of the selected markers, supporting the morphological distinction being explained by environmental factors. The results from CCA supported a relationship between the observed morphological variation and the local environmental characteristics of wind speed and minimum temperature.
机译：南极洲的极端生活条件对许多生物构成挑战。苔藓植物包括该大陆的主要植被，他们忍受着许多逆境，在敌对敌对的环境中蓬勃发展。已知苔藓表现出表型可塑性，由于基因型异质性，环境影响或两者的组合。我们调查了形态多样性及其与南极苔藓，Roaldia Revoluta的遗传多样性的关系，以及如果Morothepes的地理分布与环境变量有关。我们从南极洲获得49个样本，包括乔治岛（k），詹姆斯罗斯岛（j），以及南极半岛（P）的几个地点，代表了该物种的大部分栖息地。使用配子型形态特征的定量测量进行了主要成分分析（PCA）。对于分子分析，我们使用从29个样本获得的五种分子标记的DNA序列。进行规范对应分析（CCA）以比较与环境变量的形态多样性。我们的数据支持r. revoluta的两种Mor晶片，Mor蝶蛋白A（Apiculate和Oveate叶）的存在，在K中更频繁地频繁，并且Mor型酪蛋白B（注重致荧光素和更多的叶片），在J的情况下更常见。两种Morothepes都存在于P.不同的Morothepys不能与遗传异质性无关，因为在任何选定标记中没有发现序列差异，支持通过环境因素解释的形态学区别。 CCA的结果支持观察到的形态变异与风速和最小温度的局部环境特征之间的关系。

著录项

相似文献

  • 外文文献
  • 中文文献
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