Assessment of Tannin Variation in Tamarisk Foliage Across a Latitudinal Gradient

摘要

Certain phenotypic traits of plants vary with latitude of origin. To understand if tannin concentration variesamong populations of tamarisk (Tamarix spp.) according to a latitudinal gradient, an analytical method was adapted froman enological tannin assay. The tannin content (wet basis) of tamarisk foliage collected from 160 plants grown in acommon garden ranged from 8.26 to 62.36 mg/g and was not correlated with the latitude of the original North Americanplant collection site. Tannins do not contribute to observed differences in herbivory observed among these tamariskpopulations.