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Composition of leaf surface waxes of Triticum species: Variation with age and tissue

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1016/0031-9422(73)85124-6
AuteurRechercher : 1
Affiliation
  1. Conseil national de recherches du Canada. Laboratoire régional des prairies
FormatTexte, Article
SujetTriticum aestivum; T. durum; gramineae; wheat; spring, durum; leaf wax; GLC analysis of whole; variation in wax composition with age and part of plant
Résumé
The composition of cuticular wax from plants of spring wheat (varieties Selkirk and Manitou) and of durum wheat (variety Stewart 63) at various stages of growth, and of wax from different parts of the plants varies considerably. Wax was analysed, without preliminary separation, by GLC using Dexsil 300 as liquid phase. Alcohols are major components of wax from leaf blades and β-diketones are major components of wax from leaf sheaths, especially the flag leaf sheath. Glaucousness of the leaf sheath is due to the high β-diketone content. In the first 50 days after germination, before sheaths and flag leaf are completely developed, the major component is octacosanol (> 50%). At 66 days, when sheath development is complete, β-diketone content is greatest. Hydrocarbon composition differs for wax from leaf blade and leaf sheath and also for different leaf blades and between adaxial and abaxial sides of the flag leaf. From 66 to 100 days ester content of wax increases, especially in Selkirk wheat, apparently due to formation of wax containing high proportions of esters of trans-α,β-unsaturated C₂₂ and C₂₄ acids. The content of these acids in the free fatty acids and of diesters based on these acids also increases during this period.
Date de publication
Maison d’éditionElsevier
Dans
  • Phytochemistry 12, nº 9 (septembre 1973) : 2225–2232.
Langueanglais
Publications évaluées par des pairsOui
Identificateur0031942273851246
NRCC-13175
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Identificateur de l’enregistrement68478a2b-be0f-413e-9883-fad31d17371d
Enregistrement créé2023-11-09
Enregistrement modifié2023-11-09
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