Habitat preferences as related to the prolonged dormancy of perennial herbs and ferns
Habitat preferences as related to the prolonged dormancy of perennial herbs and ferns
复制标题
与多年生草本植物和蕨类植物的长期休眠有关的栖息地偏好
作者：
Margit Reintal;Kadri Tali;M. Haldna;T. Kull
长期休眠（以下简称休眠）是一种多年生草本植物一年或多年不发芽的现象。这种现象可能比迄今为止所述的更为频繁，并且其在植物生命史和表现中的作用的发现仍在进行中。对已发表论文的数据进行了审查，并从物种生态价值的角度分析了所有已知的休眠物种。对环境因素（光、湿度、pH 值和氮，由 Ellenberg 指标值估计）的适应会影响休眠的最长持续时间。在喜欢在良好光照条件、干燥地点和贫瘠土壤中生长的物种中，较高比例的植物处于休眠状态。对于喜欢在干燥地区和/或钙质土壤中生长的物种，休眠期的持续时间较长。我们相信，一系列因素控制着植物的行为，然而，环境胁迫是诱导休眠的主要因素。
Prolonged dormancy (hereafter dormancy), a phenomenon in which a perennial herbaceous plant does not sprout for one or more years, is examined. The phenomenon may be more frequent than stated so far and discovery of its role in plant life history and performance is still underway. Data from published papers was reviewed and all known species exhibiting dormancy were analysed from the aspect of species ecological values. Adaptation to environmental factors (light, moisture, pH and nitrogen as estimated by Ellenberg indicator values) influences the maximum duration of dormancy. A higher proportion of plants are dormant in species that prefer to grow in good light conditions, dry sites and infertile soil. The duration of dormant period is longer in species that prefer to grow in dry sites and/or calcareous soils. A range of factors, we believe, control plant behaviour, however, it is suggested that environmental stress is the principal factor inducing dormancy.