期刊
PLANTS-BASEL
卷 11, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/plants11091222
关键词
pteridophytes; ferns; Selaginella; desiccation tolerance; protection mechanisms
资金
- Governor University Research Initiative program
- State of Texas
Pteridophytes, a group comprised of lycophytes and ferns, occupy an intermediate position in plant evolution and exhibit characteristics of both bryophytes and seed plants. Desiccation-tolerant pteridophytes show a strategy that is intermediate between constitutive and inducible desiccation tolerance mechanisms observed in bryophytes and angiosperms. Research on the evolution and regulation of desiccation tolerance in pteridophytes is crucial for understanding plant adaptation to extreme environments.
In the context of plant evolution, pteridophytes, which is comprised of lycophytes and ferns, occupy an intermediate position between bryophytes and seed plants, sharing characteristics with both groups. Pteridophytes is a highly diverse group of plant species that occupy a wide range of habitats including ecosystems with extreme climatic conditions. There is a significant number of pteridophytes that can tolerate desiccation by temporarily arresting their metabolism in the dry state and reactivating it upon rehydration. Desiccation-tolerant pteridophytes exhibit a strategy that appears to be intermediate between the constitutive and inducible desiccation tolerance (DT) mechanisms observed in bryophytes and angiosperms, respectively. In this review, we first describe the incidence and anatomical diversity of desiccation-tolerant pteridophytes and discuss recent advances on the origin of DT in vascular plants. Then, we summarize the highly diverse adaptations and mechanisms exhibited by this group and describe how some of these plants could exhibit tolerance to multiple types of abiotic stress. Research on the evolution and regulation of DT in different lineages is crucial to understand how plants have adapted to extreme environments. Thus, in the current scenario of climate change, the knowledge of the whole landscape of DT strategies is of vital importance as a potential basis to improve plant abiotic stress tolerance.
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