Multidisciplinary analysis of the evolution of mycoheterotrophy in Japanese orchids

我们测试了几个兰花群体中与获得真菌异质性相关的生态生理特征的进化。1)在几个兰花种群中，完全菌丝异养是通过部分菌丝异养逐渐出现的，而不是直接来自自养。2)菌丝异养是与生理生态特性相关的各种性状进化的结果。3)不同的真菌异养物种表现出不同的营养相关性状组合。从自养到真菌异养的过程是多样和复杂的，而以前的研究强调的是一个简单的进化事件。

We tested evolution of ecophysiological characters associated with the acquisition of mycoheterotrophy in several orchid groups. We demonstrated the following insights : 1) in several orchid groups, full mycoheterotrophy appeared gradually via partial mycoheterotrophy, not directly from autotrophy. 2) Mycoheterotrophy is results of evolution of various characters related to ecophysiological properties. 3) Each mycoheterotrophic species exhibits different combinations of characters relevant to nutrition. The processes involved in shifting from autotrophy to mycoheterotrophy are diverse and complex, whereas previous studies emphasized a simple evolutionary event.