Cuticular wax composition greatly impacts plant responses to dehydration. Two parallel pathways exist in Triticeae for manipulating wax composition: the acyl elongation, reduction, and decarbonylation pathway that is active at the vegetative stage and yields primary alcohols and alkanes, and the β-diketone pathway that predominates at the reproductive stage and synthesizes β-diketones. Variatio...

The interface between plants and the environment is provided for aerial organs by epicuticular waxes that have been extensively studied. By contrast, little is known about the nature, biosynthesis, and role of waxes at the root-rhizosphere interface. Waxes isolated by rapid immersion of Arabidopsis (Arabidopsis thaliana) roots in organic solvents were rich in saturated C18-C22 alkyl esters of p...

The diploid Aegilops tauschii is the D-genome donor to hexaploid wheat (Triticum aestivum) and represents a potential source for genetic study in common wheat. The ubiquitous wax covering the aerial parts of plants plays an important role in protecting plants against non-stomatal water loss. Cuticular waxes are complex mixtures of very-long-chain fatty acids, alkanes, primary and/or secondary a...

Hydrogen isotope ratios are sensitive tracers of the water cycle with potential to constrain timing mountain building episodes in geologic past. This study presents hydrogen (2H/1H or δ2H) n-alkanes derived from leaf wax terrestrial plants, collected trees and soils along an east–west transect across Cascade range Washington State, USA. Along this transect, δ2H values (δ2Halkane) surface gymnos...

Iron mining activities are a source of particulate iron, which contaminates soil and plants Restinga biome (Brazil). To investigate the possible effects iron toxicity to Ipomoea pes-caprae Canavalia rosea leaves, were submitted different exposure times (12, 36, 108 228 hours) concentrations (0.5 or 150 mg L-1, Fe2+ as FeSO4.7H2O). After hours C. leaves chlorotic while I. presented venal chloros...

Arabidopsis wax components containing secondary functional groups were examined (i) to test the biosynthetic relationship between secondary alcohols and ketols and (ii) to determine the regiospecificity and substrate preference of the enzyme involved in ketol biosynthesis. The stem wax of Arabidopsis wild type contained homologous series of C(27) to C(31) secondary alcohols (2.4 microg cm(-2)) ...