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Cell wall O-acetyl and methyl esterification patterns of leaves reflected in atmospheric emission signatures of acetic acid and methanol
PloS one, 2020-05, Vol.15 (5)
[Peer Reviewed Journal]
ISSN: 1932-6203 ;EISSN: 1932-6203
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Title:
Cell wall O-acetyl and methyl esterification patterns of leaves reflected in atmospheric emission signatures of acetic acid and methanol
Author:
Dewhirst, Rebecca A.
;
Afseth, Cassandra A.
;
Castanha, Cristina
;
Mortimer, Jenny C.
;
Jardine, Kolby J.
;
Brilli, ed., Federico
Subjects:
BASIC BIOLOGICAL
SCIENCES
;
ENVIRONMENTAL
SCIENCES
Is Part Of:
PloS one, 2020-05, Vol.15 (5)
Description:
Plants emit high rates of methanol (meOH), generally assumed to derive from pectin demethylation, and this increases during abiotic stress. In contrast, less is known about the emission and source of acetic acid (AA). In this study, Populus trichocarpa (California poplar) leaves in different developmental stages were desiccated and quantified for total meOH and AA emissions together with bulk cell wall acetylation and methylation content. While young leaves showed high emissions of meOH (140 μmol m-2) and AA (42 μmol m-2), emissions were reduced in mature (meOH: 69%, AA: 60%) and old (meOH: 83%, AA: 76%) leaves. In contrast, the ratio of AA/meOH emissions increased with leaf development (young: 35%, mature: 43%, old: 82%), mimicking the pattern of O-acetyl/methyl ester ratios of leaf bulk cell walls (young: 35%, mature: 38%, old: 51%), which is driven by an increase in O-acetyl and decrease in methyl ester content with age. The results are consistent with meOH and AA emission sources from cell wall de-esterification, with young expanding tissues producing highly methylated pectin that is progressively demethyl-esterified. We highlight the quantification of AA/meOH emission ratios as a potential tool for rapid phenotype screening of structural carbohydrate esterification patterns.
Publisher:
United States: Public Library of Science (PLoS)
Language:
English
Identifier:
ISSN: 1932-6203
EISSN: 1932-6203
Source:
GFMER Free Medical Journals
PubMed Central
Public Library of Science (PLoS)
ProQuest Central
DOAJ Directory of Open Access Journals
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