期刊
CARBOHYDRATE POLYMERS
卷 208, 期 -, 页码 180-190出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.12.051
关键词
Cell wall; Desiccation; Hemicellulose; Mannan; Polysaccharide; Xylan; Xyloglucan
资金
- Indo-French Centre for the Promotion of Advanced Research-CEFIPRA [5300-B1]
- University of Rouen Normandie (URN), Federation de Recherche Normandie-Vegetal-FED
- Labex SynOrg [ANR-11-LABX-0029]
- European Regional Development Fund [ERDF 31708]
Drought-induced dehydration of vegetative tissues in lycopods affects growth and survival. Different species Selaginella have evolved a series of specialized mechanisms to tolerate desiccation in vegetative tissues in response to water stress. In the present study, we report on the structural characterization of the leaf cell wall of the desiccation-tolerant species S. involvens and two desiccation-sensitive species, namely S. kraussiana and S. moellendorffii. Isolated cell walls from hydrated and desiccated leaves of each species were fractionated and the resulting oligosaccharide fragments were analyzed to determine their structural features. Our results demonstrate that desiccation induces substantial modifications in the cell wall composition and structure. Altogether, these data highlight the fact that structural remodeling of cell wall hemicellulosic polysaccharides including XXXG-rich xyloglucan, arabinoxylan and acetylated galactomannan is an important process in order to mitigate desiccation stress in Selaginella.
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