Wu Di, Li Linbao, Ma Xiaobo, Huang Guiyun, Yang Chaodong
Rare Plants Research Institute of Yangtze River, Three Gorges Corporation, Yichang, China.
Engineering Research Center of Ecology and Agriculture Use of Wetland, Ministry of Education, Yangtze University, Jingzhou, China.
PeerJ. 2020 Sep 30;8:e9937. doi: 10.7717/peerj.9937. eCollection 2020.
The natural distribution of the rare perennial fern var. (Pteridaceae), which is endemic to shady cliff environments, is limited to small areas of Wanzhou County, Chongqing, China. In this study, we used brightfield and epifluorescence microscopy to investigate the anatomical structures and histochemical features that may allow this species to thrive in shady, dry cliff environments. The var. sporophyte had a primary structure and a dictyostele. The plants of this species had an endodermis, sclerenchyma layers and hypodermal sterome, reflecting an adaption to dry cliff environments. Blades had a thin cuticle and isolateral mesophyll, suggesting a tolerance of shady environments. These characteristics are similar to many sciophyte ferns such as and . Thus, the morphological and anatomical characteristics of var. identified in this study are consistent with adaptations to shady, dry cliff environments.
珍稀多年生蕨类植物（凤尾蕨科）的自然分布仅限于中国重庆万州区的小片区域，该物种为阴湿悬崖环境特有。在本研究中，我们使用明场和落射荧光显微镜来研究其解剖结构和组织化学特征，这些特征可能使该物种在阴暗、干燥的悬崖环境中茁壮成长。该蕨类植物的孢子体具有初生结构和网状中柱。该物种的植株具有内皮层、厚壁组织层和皮下厚壁组织，反映出对干燥悬崖环境的适应。叶片具有薄角质层和等面叶肉，表明对阴暗环境具有耐受性。这些特征与许多阴生蕨类植物如[具体蕨类植物名称1]和[具体蕨类植物名称2]相似。因此，本研究中确定的该蕨类植物的形态和解剖特征与对阴暗、干燥悬崖环境的适应性一致。
