title: Phenanthrene sorption by fruit cuticles and potato periderm with different compositional characteristics.
abstract: Phenanthrene sorption by fruit cuticles (tomato, apple, and grape), potato tuber periderm, and their fractions were investigated to elucidate effects of compositional characteristics on affinity of plant cuticle (above-ground) and periderm (below-ground) with hydrophobic organic contaminants (HOCs). The distinct roles of the extractable lipids (waxes), the depolymerizable lipids (cutin/suberin), the nonsaponifiable lipids (cutan/suberan) and polysaccharide are discussed. The cutin/suberin rather than waxes dominates the sorption properties of bulk cuticle/periderm, but the sorption coefficient (K(d)) is linearly correlated with the total lipid contents. Polysaccharide plays a negative role in HOC sorption due to its obviously poor affinity with HOCs and restriction effect on the other powerful sorptive regions in cuticle/periderm. The significantly lower sorption of periderm than cuticle is attributed to the former having higher polysaccharide and lower depolymerizable lipids. The linear correlation of K(d) of bulk cuticle/periderm with polysaccharide content is observed for a potential prediction of plant uptake.
authors.affiliation: Department of Environmental Science, Zhejiang University, Hangzhou, China.
authors.forename: Yungui
authors.initials: Y
authors.lastname: Li
authors.forename: Baoliang
authors.initials: B
authors.lastname: Chen
mesh_terms: D000327:Adsorption; D005638:Fruit / Q000737:chemistry* / Q000187:drug effects; D007700:Kinetics; D008055:Lipids / Q000737:chemistry*; D019684:Magnoliopsida / Q000737:chemistry* / Q000187:drug effects; D010616:Phenanthrenes / Q000493:pharmacokinetics*; D035281:Plant Tubers / Q000737:chemistry / Q000187:drug effects; D011198:Solanum tuberosum / Q000737:chemistry* / Q000187:drug effects
chemical_list: D008055:Lipids; D010616:Phenanthrenes; C031181:phenanthrene