Polyesters in Higher Plants

Kolattukudy, Pappachan E.

doi:10.1007/3-540-40021-4_1

Cited by 324 publications

(409 citation statements)

References 159 publications

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“…Minor peaks for C 14 and C 17 -C 28 fatty acid MEs and C 22 -C 28 ω-methoxy fatty acid MEs, with strong evenover-odd carbon numbers, were found as well (8% in leaf, 1 ± 1% in the other samples). The long chain fatty acid MEs and ω-methoxy fatty acid MEs were more abundant in the root and outer rhizome, which is in agreement with a suberin origin (Kolattukudy 2001;Nierop and Verstraten 2004). Traces of non-methylated phytadienes, the same compounds as detected after PY-GC-MS, were found among the THM products of the leaf material only (0.4%).…”

Section: Thermally Assisted Hydrolysis and Methylation (Thm-gc-ms)supporting

confidence: 75%

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

et al. 2016

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Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat.Aquatic Botany http://dx.doi.org/10. 1016/j.aquabot.2016.05.009 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Graphical abstract Highlights-Analytical pyrolysis applied to Posidonia seagrass organs and marine mat deposit -Posidonia phenolic composition dominated by p-hydroxybenzoic acids -Peat-like mat deposits composed predominantly of root, rhizome and sheath materials -We suggest a link between Posidonia chemistry and C accumulation in mats AbstractPosidonia oceanica forms extensive peat-like deposits (mats) in Mediterranean coastal waters, which have a potential as carbon sinks and archives of environmental change.Nonetheless, the organic chemistry of both P. oceanica plant materials, as well as the environmental and diagenetic effects on the composition of its detritus, is poorly understood.We analyzed plant organs of P. oceanica and the coarse organic matter from a mat core spanning 750 yrs using pyrolysis techniques (PY-GC-MS and THM-GC-MS) to improve our understanding of their molecular properties and their preservation upon mat development. It

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Section: Thermally Assisted Hydrolysis and Methylation (Thm-gc-ms)supporting

confidence: 75%

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

et al. 2016

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“…In addition, the few lipases identified in the A. nidulans secretome grown on leaf litter reported very low spectral counts at the seventeenth day [47]. This agrees with the high recalcitrance of cutin, which shares high similarity with the polyaliphatic suberin [3]. It seems reasonable to hypothesise that A. nidulans failed to degrade the polyaliphatic suberin in cork, as suggested above by the spectroscopic analysis (Fig.…”

supporting

confidence: 80%

Investigating Aspergillus nidulans secretome during colonisation of cork cell walls

Martins

Garcia

Varela

et al. 2014

Journal of Proteomics

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Cork, the outer bark of Quercus suber, shows a unique compositional structure, a set of remarkable properties, including high recalcitrance. Cork colonisation by Ascomycota remains largely overlooked. Herein, Aspergillus nidulans secretome on cork was analysed (2DE).Proteomic data were further complemented by microscopic (SEM) and spectroscopic (ATR-FTIR) evaluation of the colonised substrate and by targeted analysis of lignin degradation compounds (UPLC-HRMS). Data showed that the fungus formed an intricate network of hyphae around the cork cell walls, which enabled polysaccharides and lignin superficial degradation, but probably not of suberin. The degradation of polysaccharides was suggested by the identification of few polysaccharide degrading enzymes (β-glucosidases and endo-1,5--L-arabinosidase).Lignin degradation, which likely evolved throughout a Fenton-like mechanism relying on the activity of alcohol oxidases, was supported by the identification of small aromatic compounds (e.g. cinnamic acid and veratrylaldehyde) and of several putative high molecular weight lignin degradation products. In addition, cork recalcitrance was corroborated by the identification of several protein species which are associated with autolysis. Finally, stringent comparative proteomics revealed that A. nidulans colonisation of cork and wood share a common set of enzymatic mechanisms. However the higher polysaccharide accessibility in cork might explain the increase of β-glucosidase in cork secretome.

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“…[40]. Figure 11 -Effect of puroindolines on the structure of bread crumb (left); standard bread obtained from a PIN-a free cultivar (1) to which 0.1% puroindoline was added (2). Relationship with the structure of a puroindoline foam (3, right).…”

Section: Resultsmentioning

confidence: 99%

“…This hydrophobic layer is generally not taken into account by most studies having a technological background while it display unique physico-chemical properties. Cutin is an hydrophobic polymer composed mainly by hydroxy fatty acid derivatives forming a tridimensional polyester network in which waxes, esters of long chain fatty acids and alcohols (> C20), are embedded [2]. These lipids and lipid structures are still widely ignored although they play a significant role in the diffusion of water in plant organs and in the cohesiveness of plant tissues.…”

Section: Cereal Lipids: Composition Distribution and Organisationmentioning

confidence: 99%

Functionality of lipids and lipid-protein interactions in cereal-derived food products

Marion

Dubreil

Douliez

2003

OCL

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Résumé :Les lipides et en particulier les lipides des céréales jouent un rôle important dans la transformation et la qualité des produits céréaliers de cuisson (pains, biscuits) et des boissons (bière). La plupart des mécanismes physico-chimiques responsables de la fonctionnalité des lipides a été étudiée et récemment, le rôle particulier des protéines impliquées dans la fixation des lipides, les protéines de transfert de lipides et les puroindolines a été mis en évidence. L'état des recherches menées dans ce domaine est présenté dans cette revue et les informations acquises aujourd'hui montrent que de nouvelles perspectives sont envisageables pour la sélection et la transformation en vue d'améliorer la qualité des céréales et des produits céréaliers.Summary : Lipids and especially cereal lipids play a significant role in the processing and quality of cereals and baked cereal foods (bread, biscuits) and beverages (beer). Most of the physico-chemical mechanisms responsible for the lipid functionality has been investigated and recently the specific role of lipid-binding proteins, e.g. lipid transfer proteins and puroindolines, has been highlighted. The state of the researches performed in this field are briefly presented in this review and the data obtained until now show that new perspectives are opened in cereal breeding and processing for improving the quality of cereals and cereal products.

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Polyesters in Higher Plants

Cited by 324 publications

References 159 publications

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

Investigating Aspergillus nidulans secretome during colonisation of cork cell walls

Functionality of lipids and lipid-protein interactions in cereal-derived food products

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