Document Detail


Interspecific variation in bulk tissue, fatty acid and monosaccharide delta(13)C values of leaves from a mesotrophic grassland plant community.
MedLine Citation:
PMID:  18539304     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The leaves of 37 grass, herb, shrub and tree species were collected from a mesotrophic grassland to assess natural variability in bulk, fatty acid and monosaccharide delta(13)C values of leaves from one plant community. The leaf tissue mean bulk delta(13)C value was -29.3 per thousand. No significant differences between tissue bulk delta(13)C values with life form were determined (P=0.40). On average, C(16:0), C(18:2) and C(18:3) constituted 89% of leaf tissue total fatty acids, whose delta(13)C values were depleted compared to whole leaf tissues. A general interspecific (between different species) trend for fatty acids delta(13)C values was observed, i.e. delta(13)C(16:0)<delta(13)C(18:2)<delta(13)C(18:3), although these values ranged widely between species, e.g. C(16:0) (-34.7 per thousand, Alisma plantago-aquatica; -44.0 per thousand, Leucanthemum vulgare), C(18:2) (-33.3 per thousand, Acer campestre; -44.2 per thousand, L. vulgare;) and C(18:3) (-34.3 per thousand, Bellis perennis; -41.8 per thousand, Plantago lanceolata). Average relative abundances of leaf monosaccharides arabinose, xylose, mannose, galactose and glucose were 12%, 13%, 5%, 12% and 54%, respectively. Mean delta(13)C values of these monosaccharides were -26.6 per thousand (arabinose), -27.2 per thousand (xylose), -30.9 per thousand (mannose), -30.0 per thousand (galactose) and -29.0 per thousand (glucose). The general relationship between individual monosaccharide delta(13)C values, delta(13)C(arabinose)>delta(13)C(xylose)>delta(13)C(glucose)>delta(13)C(galactose), was consistently observed. Therefore, we have shown (i) diversity in compound-specific delta(13)C values contributing to leaf bulk delta(13)C values; (ii) interspecific variability between bulk and compound-specific delta(13)C values of leaves of individual grassland species, and (iii) trends between individual fatty acid and monosaccharide delta(13)C values common to leaves of all species within one plant community.
Authors:
Jennifer A J Dungait; Gordon Docherty; Vanessa Straker; Richard P Evershed
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-06-06
Journal Detail:
Title:  Phytochemistry     Volume:  69     ISSN:  0031-9422     ISO Abbreviation:  Phytochemistry     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-06-30     Completed Date:  2008-09-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0151434     Medline TA:  Phytochemistry     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2041-51     Citation Subset:  IM    
Affiliation:
Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre, School of Chemistry, Cantocks Close, Bristol, UK.
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MeSH Terms
Descriptor/Qualifier:
Carbon Isotopes
Fatty Acids / chemistry,  metabolism
Molecular Structure
Monosaccharides / chemistry*,  metabolism*
Plant Leaves / chemistry,  metabolism
Poaceae / chemistry*,  metabolism*
Chemical
Reg. No./Substance:
0/Carbon Isotopes; 0/Fatty Acids; 0/Monosaccharides

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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