xxxx系列电影 我院丛林生态团队与科廷大学共同揭示种子植物生殖系统对林火的相宜机制
发布日期：2024-11-19 23:36 点击次数：76
中枢教唆： 中枢教唆：近日xxxx系列电影，我校园艺苑学学院丛林生态团队和澳大利亚科廷大学在生物学畛域杂志Biological Reviews发表了综述论文，揭示了种子植物生殖系统对林火的相宜机制。
xxxx系列电影
图1. Age of fire-prone taxa/clades relative to component taxa/clades with fire-resistant or fire-enhancing traits. The broken diagonal line corresponds to the time where the onset of fire-proneness and fire-adapted traits coincide (or at least they lie on the same internode and current methods do not allow any age differences to be distinguished). The taxa and their associated traits are stated near their coordinates (black spots), i.e. the age of the parent clade on the x axis and the time the targeted trait is estimated to have arisen in the clade on the y axis (typically the former is older than the latter, i.e. the trait arose some time after the clade became fire-prone). Duration of the fire-prone parent clade is shown separately from the non-fire-prone parent clade (the latter is open-ended as its duration is unknown or continues indefinitely). D1 = primary directional selection; D2 = secondary directional selection; S = stabilised selection. The shaded lower triangular area is the region in which the component taxa/clades are fire-prone. Mya, million years ago.
课题组显然了植物通过生殖系统和种子萌生进化相宜林火的历程。植物生殖系统对林火相宜在白垩纪（120至65百万年）演化渐渐，重生代中期（65至20百万年）演化加快，五百万年前达到岑岭（图2），这归因于助长条目的波动和不适于非萌芽的稀树草原的增多。在重生代，跟着天下气虚心氧气水平的裁汰，失火步履减少，活着界范围内，植物的火相宜性状的演化，在40至30百万年处于低谷。在中白垩纪，厚树皮的系统发育出当今现有的松科植物中。林火刺激硬种子的萌生发源于1亿年前，主要发源于易燃植物，如烟熏刺激的帚灯草科和苞穗草科种子萌生，但在一些易燃植物的分支中，王人穷乏与火筹商的生物性状。课题组通过分析Protea属（发源于非洲）和Hakea属（发源于澳大利亚）植物往时两千万年来的进化历程，发现还有一些物种通过生殖系统进化和种子萌生进化发生时时调度以相宜林火。
图2
图2. Contribution of four novel and conserved fire-related trait-types to total (net) speciation at the lineage level for 10-million-year (My) intervals over the last 120 My. The outcomes of primary (D1) and secondary (D2) selection have been combined. The broken lines are the trends for the 12060 Mya (Upper Cretaceous) and 600 Mya (Cenozoic) periods.
除松科植物外，大部分与林火相关的生物性状的发源和进化王人发生在南半球， 这与南半球历史上的风景条目相关。活着界范围内，失火对植物繁衍性状的演化产生了潜入的影响，并为很多与失火无关性状的后续进化奠定了基础。该项辩论恶果拓宽了东说念主们对植物生殖系统系统发育的领略，为辩论植物在人人风景变化下的生物学特质的进化提供焦虑的表面参考。
本辩论赢得了中央高校基本科研业务费专项资金的复旧，澳大利亚科廷大学训导Lamont为论文第一作家，博士晏召贵为论文通信作家。
原文连气儿：https://onlinelibrary.wiley.com/doi/full/10.1111/brv.12483
通信员：滕明君
审核东说念主：晏召贵 王鹏程