Desiccation tolerance in plants: Structural characterization of the cell wall hemicellulosic polysaccharides in three Selaginella species.
Cell wall
Desiccation
Hemicellulose
Mannan
Polysaccharide
Xylan
Xyloglucan
Journal
Carbohydrate polymers
ISSN: 1879-1344
Titre abrégé: Carbohydr Polym
Pays: England
ID NLM: 8307156
Informations de publication
Date de publication:
15 Mar 2019
15 Mar 2019
Historique:
received:
30
08
2018
revised:
16
11
2018
accepted:
17
12
2018
entrez:
20
1
2019
pubmed:
20
1
2019
medline:
14
5
2019
Statut:
ppublish
Résumé
Drought-induced dehydration of vegetative tissues in lycopods affects growth and survival. Different species of 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.
Identifiants
pubmed: 30658789
pii: S0144-8617(18)31497-8
doi: 10.1016/j.carbpol.2018.12.051
pii:
doi:
Substances chimiques
Polysaccharides
0
hemicellulose
8024-50-8
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
180-190Informations de copyright
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