Comparative Micromorphology and Ultrastructure of Resurrection and Non-resurrection Selaginella Species
文献类型： 外文期刊
作者： Yu, Rongpei 1 ; Pu, Yanfei 4 ; Baniaga, Anthony E. 5 ; Lu, Shugang 6 ; Zhang, Guangfei 6 ;
作者机构： 1.Yunnan Univ, Sch Ecol & Environm Sci, Sch Life Sci, Inst Ecol & Geobot, Kunming 650091, Yunnan, Peoples R China
2.Yunnan Acad Agr Sci, Flower Res Inst, Kunming 650205, Yunnan, Peoples R China
3.Yuxi Yunxing Biotech Co Ltd, Yuxi 653100, Yunnan, Peoples R China
4.Yunnan Univ, Sch Agr, Kunming 650504, Yunnan, Peoples R China
5.Yale Univ, Dept Ecol & Evolutionary Biol, POB 208106, New Haven, CT 06520 USA
6.Yunnan Univ, Sch Ecol & Environm Sci, Inst Ecol & Geobot, Kunming 650091, Yunnan, Peoples R China
7.Yunnan Univ, Yunnan Key Lab Plateau Mt Ecol & Restorat Degrade, Kunming 650091, Yunnan, Peoples R China
关键词： Microphylls; Anatomy; Stomata; Cellular structure
期刊名称：AMERICAN FERN JOURNAL （ 影响因子：0.9； 五年影响因子：0.919 ）
ISSN： 0002-8444
年卷期： 2022 年 112 卷 1 期
页码：
收录情况： SCI
摘要： Most species in the genus Selaginella (Selaginellaceae) are susceptible to desiccation, while a few species are able to withstand the extreme desiccation, recover metabolic functioning, and grow rapidly after rehydration. However, there is limited information about the anatomical features of the resurrection species in Selaginella. In the present study, we compared the microphyll micromorphology and ultrastructure of two resurrection species (S. pulvinata and S. sanguinolenta), and two non-resurrection species (S. kraussiana and S. chrysocaulos). Compared with the two non-resurrection species, the two resurrection species had most of their stomata distributed on the adaxial surface of microphylls that were tightly attached to stems, and possessed smaller and thicker microphylls, smaller stomatal size, higher stomatal density, thicker epidermal cell walls, more chloroplasts, and denser cytoplasm. These micromorphological and ultrastructural features of the two resurrection species were beneficial in reducing the transpiration and dehydration damage and could be considered as ecological adaptations to xeric environments.
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