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suberin wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 anatomy and physiology 2 structure and biosynthesis 3 see also 4 references toggle the table of contents suberin 28 languages afrikaans العربية অসমীয়া беларуская বাংলা català čeština deutsch ελληνικά español euskara français galego bahasa indonesia italiano 日本語 jawa lietuvių nederlands polski português română русский simple english slovenčina svenska українська 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia hydrophobic lipid polyester in plant cell walls cork is rich in suberin which provides its hydrophobic properties suberin is a lipophilic complex polyester biopolymer found in plants it is composed of long chain fatty acids called suberin acids and glycerol suberin is interconnected with cutin and lignin and forms a protective barrier in the epidermal and peridermal cell walls of higher plants suberin and lignin are considered covalently linked to lipids and carbohydrates respectively lignin is again covalently linked to suberin and to a lesser extent to cutin thus constructing a complex macromolecular matrix 1 2 3 suberin is a major constituent of cork and is named after the cork oak quercus suber its main function is as a barrier to movement of water and solutes anatomy and physiology edit suberin is highly hydrophobic and a somewhat rubbery material in roots suberin is deposited in the radial and transverse tangential cell walls of the endodermal cells this structure known as the casparian strip or casparian band functions to prevent water and nutrients taken up by the root from entering the stele through the apoplast instead water must bypass the endodermis via the symplast this allows the plant to select the solutes that pass further into the plant it thus forms an important barrier to harmful solutes 4 for example mangroves use suberin to minimize salt intake from their littoral habitat suberin is found in the phellem layer of the periderm or cork this is the outermost layer of the bark the cells in this layer are dead and abundant in suberin preventing water loss from the tissues below suberin can also be found in various other plant structures for example they are present in the lenticels on the stems of many plants and the net structure in the rind of a netted melon is composed of suberised cells structure and biosynthesis edit suberin is contained in the bark of pine trees suberin consists of two domains a polyaromatic and a polyaliphatic domain 5 the polyaromatics are predominantly located within the primary cell wall and the polyaliphatics are located between the primary cell wall and the cell membrane the two domains are supposed to be cross linked the exact qualitative and quantitative composition of suberin monomers varies in different species some common aliphatic monomers include α hydroxyacids mainly 18 hydroxyoctadec 9 enoic acid and α ω diacids mainly octadec 9 ene 1 18 dioic acid the monomers of the polyaromatics are hydroxycinnamic acids and derivatives such as feruloyltyramine in addition to the aromatic and aliphatic components glycerol has been reported a major suberin component in some species which the role of glycerol is proposed to interlink aliphatic monomers and possibly also to link polyaliphatics to polyaromatics during suberin polymer assembly the polymerization step of aromatic monomers has been shown to involve a peroxidase reaction the biosynthesis of the aliphatic monomers shares the same upstream reactions with cutin biosynthesis and the biosynthesis of aromatics shares the same upstream reactions with lignin biosynthesis phlobaphen also occurs in the polyaromatic part of the suberin mixture see also edit suberic acid a monomeric unit within suberin 6 suberinic acid a term that is used to describe a mixture of predominantly long chain fatty acids found in the bark of betula trees references edit lewis n g yamamoto e wooten j b just g ohashi h towers g h 1987 monitoring biosynthesis of wheat cell wall phenylpropanoids in situ science 237 4820 1344 6 bibcode 1987sci 237 1344l doi 10 1126 science 237 4820 1344 pmid 17801473 s2cid 20580637 graça j 2015 suberin the biopolyester at the frontier of plants frontiers in chemistry 3 62 bibcode 2015frch 3 62g doi 10 3389 fchem 2015 00062 pmc 4626755 pmid 26579510 bernards m a march 2002 demystifying suberin canadian journal of botany 80 3 227 240 14 bibcode 2002cajb 80 227b doi 10 1139 b02 017 kolattukudy p e 1984 biochemistry and function of cutin and suberin canadian journal of botany 62 12 2918 2933 bibcode 1984cajb 62 2918k doi 10 1139 b84 391 issn 0008 4026 kolattukudy p e 1980 biopolyester membranes of plants cutin and suberin science 208 4447 990 1000 bibcode 1980sci 208 990k doi 10 1126 science 208 4447 990 issn 0036 8075 pmid 17779010 s2cid 46497057 evans w c evans d 2009 chapter 42 cell differentiation and ergastic cell contents trease and evans pharmacognosy 16th ed elsevier pp 551 562 doi 10 1016 b978 0 7020 2933 2 00042 3 isbn 978 0 7020 2933 2 v t e types of phenylpropanoids classes of phenylpropanoids hydroxycinnamic acids chromones furanochromones cinnamaldehydes monolignols coumarins chalcones flavonoids allylbenzenes stilbenoids lignans lignins suberins examples rhododendrin retrieved from https en wikipedia org w index php title suberin oldid 1368028099 categories plant anatomy plant physiology phenylpropanoids hidden categories articles with short description short description is different from wikidata all articles with specifically marked weasel worded phrases articles with specifically marked weasel worded phrases from february 2026 this page was last edited on 6 august 2026 at 16 15 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents suberin 28 languages add topic