Multiple innovations underpinned branching form diversification in mosses.
Multiple innovations underpinned branching form diversification in mosses.
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DOI：
10.1111/nph.14553
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发表时间：
2017-07
期刊：
影响因子：
--
通讯作者：
Harrison CJ
中科院分区：
文献类型：
--
作者：
Coudert Y;Bell NE;Edelin C;Harrison CJ
大规模的进化比较表明，分枝形式是由维管植物和枝藻的趋同产生的，但枝藻分枝形式多样化的轨迹尚不清楚。藓类是最丰富的物种branitte谱系和两个亚组是由替代生殖器官的位置。在一个，生殖器官形成顶端，终止生长的初级拍摄（配子体）轴。在另一种情况下，生殖器官在非常短的侧枝上发育。一个开关从顶端到侧面生殖器官的发展，提出了引发分支形式多样化。苔藓配子体具有模块化发育，每个模块由单个顶端细胞发育而成。在这里，我们定义了175苔藓的模块类的数量，分支模式和类似模块重复的模式的架构。利用祖先的性格状态重建，我们确定了两个阶段的建筑多样化。在第一阶段，模块重复模式，生殖器官的位置，分支模式和模块类的数量有顺序的变化。在第二阶段，营养的变化发生独立的生殖命运。研究结果明确了苔藓植物分枝形式多样化的发展变化的本质，并为建筑多样化的机制研究提供了一个框架。
Broad‐scale evolutionary comparisons have shown that branching forms arose by convergence in vascular plants and bryophytes, but the trajectory of branching form diversification in bryophytes is unclear. Mosses are the most species‐rich bryophyte lineage and two sub‐groups are circumscribed by alternative reproductive organ placements. In one, reproductive organs form apically, terminating growth of the primary shoot (gametophore) axis. In the other, reproductive organs develop on very short lateral branches. A switch from apical to lateral reproductive organ development is proposed to have primed branching form diversification. Moss gametophores have modular development and each module develops from a single apical cell. Here we define the architectures of 175 mosses by the number of module classes, branching patterns and the pattern in which similar modules repeat. Using ancestral character state reconstruction we identify two stages of architectural diversification. During a first stage there were sequential changes in the module repetition pattern, reproductive organ position, branching pattern and the number of module classes. During a second stage, vegetative changes occurred independently of reproductive fate. The results pinpoint the nature of developmental change priming branching form diversification in mosses and provide a framework for mechanistic studies of architectural diversification.
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影响因子：
9.4
作者：
Clarke, John T.;Warnock, Rachel C. M.;Donoghue, Philip C. J.
通讯作者：
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