Foliar limonene uptake scales positively with leaf lipid content: "non-emitting" species absorb and release monoterpenes.

摘要: Monoterpenes synthesized and released by emitting vegetation can be taken up neighboring non-emitting plants, but the uptake capacity of species has not been studied extensively. We investigated foliar potential hydrophobic monoterpene limonene in 13 contrasting leaf structure lipid content to determine structural chemical controls uptake. Leaf dry mass per unit area (M(A,D)) varied 6.5-fold, fresh ratio (D(F)) 2.7-fold, (L(M)) 2.5-fold (L(A)) 4.6-fold across species. Average rate (U(A)) from air at saturating partial pressures 0.9 6 nmol m(-2) s(-1), partition coefficient (K(FA), pressure) 0.7 6.8 micromol kg(-1) Pa(-1). U(A) K(FA) scaled positively with content, were independent D(F), indicating that variation was primary determinant differences K(FA). Mass-based rates further suggested thinner leaves greater surface have higher rates. In addition, (K(LA)=K(FA)/L(M)) 19-fold, large common content. suggest significant monoterpenes when ambient concentration is high release low should included large-scale emission models.