Resin canals or resin ducts are elongated, tube-shaped intercellular spaces surrounded by epithelial cells which secrete resin into the canal. These canals are orientated longitudinally and radially in between fusiform rays.[1] They are usually found in late wood: denser wood grown later in the season.[2]Resin is antiseptic and aromatic and prevents the development of fungi and deters insects.
Resin canals seen as white dots in pine tree viewed under a microscopeAxial resin canal (Picea abies)Pinus; leaf (3 needle type) Resin Canal
Traumatic resin canals may be formed in wounded trees that don't have normal resin canals. Wounding occurs from either fire, freezing or mechanical damage. These canals are irregularly shaped compared to normal resin canals.[2]
Characteristics
Resin canal characteristics (such as number, size and density) in pine species can determine its resistance to pests. In one study, biologists were able to categorize 84% of lodgepole pine, and 92% of limber pines, as being either susceptible or resistant to bark beetles based only on their resin canals and growth rate over 20 years.[3] In another study, scientists found ponderosa pine trees that survived drought and bark beetle attacks had resin ducts that were >10% larger in diameter, >25% denser (resin canals per mm2), and composed >50% more area of per ring.[4]
resin, canal, resin, ducts, elongated, tube, shaped, intercellular, spaces, surrounded, epithelial, cells, which, secrete, resin, into, canal, these, canals, orientated, longitudinally, radially, between, fusiform, rays, they, usually, found, late, wood, dense. Resin canals or resin ducts are elongated tube shaped intercellular spaces surrounded by epithelial cells which secrete resin into the canal These canals are orientated longitudinally and radially in between fusiform rays 1 They are usually found in late wood denser wood grown later in the season 2 Resin is antiseptic and aromatic and prevents the development of fungi and deters insects Resin canals seen as white dots in pine tree viewed under a microscopeAxial resin canal Picea abies Pinus leaf 3 needle type Resin Canal Contents 1 Types 2 Characteristics 3 References 4 Further readingTypes EditNormal resin canals exist naturally in the wood of the genera Picea Larix Pinus Pseudotsuga and Shorea Traumatic resin canals may be formed in wounded trees that don t have normal resin canals Wounding occurs from either fire freezing or mechanical damage These canals are irregularly shaped compared to normal resin canals 2 Characteristics EditResin canal characteristics such as number size and density in pine species can determine its resistance to pests In one study biologists were able to categorize 84 of lodgepole pine and 92 of limber pines as being either susceptible or resistant to bark beetles based only on their resin canals and growth rate over 20 years 3 In another study scientists found ponderosa pine trees that survived drought and bark beetle attacks had resin ducts that were gt 10 larger in diameter gt 25 denser resin canals per mm2 and composed gt 50 more area of per ring 4 References Edit Resin Canal also called Resin Duct PDF a b Wheeler Elisabeth SOFTWOOD ANATOMY RESIN CANALS www4 ncsu edu Retrieved 2017 10 24 Ferrenberg S Kane J M amp Mitton J B Oecologia 2014 174 1283 https doi org 10 1007 s00442 013 2841 2 Kane J M amp Kolb T E Oecologia 2010 164 601 https doi org 10 1007 s00442 010 1683 4Further reading EditJohn G Haygreen Jim L Bowyer Forest products and wood sciences Iowa State University Press Ames Iowa 1996 3rd ed ISBN 0 8138 2256 4 This botany article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Resin canal amp oldid 1171369363, wikipedia, wiki, book, books, library,
