Inner bark as a crucial tissue for non-structural carbohydrate storage across three tropical woody plant communities.
bark photosynthesis
bark thickness
non-structural carbohydrate pools
root storage
secondary phloem
soluble sugars
starch
wood density
wood storage
Journal
Plant, cell & environment
ISSN: 1365-3040
Titre abrégé: Plant Cell Environ
Pays: United States
ID NLM: 9309004
Informations de publication
Date de publication:
01 2021
01 2021
Historique:
received:
09
03
2020
revised:
29
09
2020
accepted:
01
10
2020
pubmed:
10
10
2020
medline:
9
6
2021
entrez:
9
10
2020
Statut:
ppublish
Résumé
Non-structural carbohydrates (NSC) are crucial for forest resilience, but little is known regarding the role of bark in NSC storage. However, bark's abundance in woody stems and its large living fraction make it potentially key for NSC storage. We quantified total NSC, soluble sugar (SS) and starch concentrations in the most living region of bark (inner bark, IB), and sapwood of twigs, trunks and roots of 45 woody species from three contrasting tropical climates spanning global extremes of bark diversity and wide phylogenetic diversity. NSC concentrations were similar (total NSC, starch) or higher (SS) in IB than wood, with concentrations co-varying strongly. NSC concentrations varied widely across organs and species within communities and were not significantly affected by climate, leaf habit or the presence of photosynthetic bark. Starch concentration tended to increase with density, but only in wood. IB contributed substantially to NSC storage, accounting for 17-36% of total NSC, 23-47% of SS and 15-33% of starch pools. Further examination of the drivers of variation in IB NSC concentration, and taking into account the substantial contribution of IB to NSC pools, will be crucial to understand the role of storage in plant environmental adaptation.
Substances chimiques
Carbohydrates
0
Water
059QF0KO0R
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
156-170Informations de copyright
© 2020 John Wiley & Sons Ltd.
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