Geophytism in monocots leads to higher rates of diversification

● Geophytes, plants with buds on underground structures, are found throughout the plant tree of life. These below ground structures allow plants to inhabit highly seasonal and disturbance-prone environments across ecosystems. Past researchers have hypothesized the bulbous, cormous and tuberous habits promote diversification, but this had yet to be tested.
● Using a comprehensive monocot data set of almost 13,000 taxa, we investigated the effects of the geophytic habit on diversification using both state-dependent and state-independent models.
● We found that geophytes exhibit increased rates of diversification relative to non-geophytes. State-dependent analyses recovered higher yet similar rates of diversification for bulbous, cormous and tuberous taxa compared to rhizomatous and non-geophytic taxa. However, the state-independent model returned no difference in rates among the different traits.
● Geophytism shows higher rates of diversification relative to non-geophytes but we find l...

● 地下芽植物（Geophytes）指在地下结构上着生芽体的植物类群，广泛分布于整个植物生命之树中。这类地下结构赋予植物在各类生态系统中栖息于高季节性且易受干扰生境的能力。过往研究者曾提出假说，认为鳞茎、球茎与块茎的生长习性可促进物种分化，但该假说尚未得到验证。
● 本研究依托涵盖近13000个类群的全面单子叶植物（monocot）数据集，同时采用状态依赖模型与状态非依赖模型，探究地下芽生长习性对物种分化的影响。
● 研究结果显示，相较于非地下芽植物，地下芽植物的物种分化速率显著更高。状态依赖分析表明，与具根状茎及非地下芽植物类群相比，鳞茎、球茎与块茎类群的物种分化速率更高且类群间无显著差异；然而状态非依赖模型未检测到不同性状类群间的分化速率存在差异。
● 相较于非地下芽植物，地下芽植物的物种分化速率更高，但我们发现……