Genotype and environment determine allocation to and costs of resistance in quaking aspen Export

@article{citeulike:3757010, abstract = {Abstract\ \ Although genetic variability and resource availability both influence plant chemical composition, little is known about how these factors interact to modulate costs of resistance, expressed as negative correlations between growth and defense. We evaluated genotype × environment effects on foliar chemistry and growth of quaking aspen (Populus tremuloides) by growing multiple aspen genotypes under variable conditions of light and soil nutrient availability in a common garden. Foliage was analyzed for levels of nitrogen, phenolic glycosides and condensed tannins. Bioassays of leaf quality were conducted with fourth-stadium gypsy moth (Lymantria dispar) larvae. Results revealed strong effects of plant genotype, light availability and nutrient availability; the importance of each factor depended upon compound type. For example, tannin concentrations differed little among genotypes and across nutrient regimes under low light conditions, but markedly so under high light conditions. Phenolic glycoside concentrations, in contrast, were largely determined by genotype. Variation in phenolic glycoside concentrations among genotypes was the most important factor affecting gypsy moth performance. Gypsy moth biomass and development time were negatively and positively correlated, respectively, with phenolic glycoside levels. Allocation to phenolic glycosides appeared to be costly in terms of growth, but only under resource-limiting conditions. Context-dependent trade-offs help to explain why costs of allocation to resistance are often difficult to demonstrate.}, author = {Osier, Tod and Lindroth, Richard}, citeulike-article-id = {3757010}, citeulike-linkout-0 = {http://dx.doi.org/10.1007/s00442-006-0373-8}, citeulike-linkout-1 = {http://www.springerlink.com/content/k686h12731u4506h}, day = {1}, doi = {10.1007/s00442-006-0373-8}, journal = {Oecologia}, keywords = {aspen, environment, genotype, resistance}, month = {June}, number = {2}, pages = {293--303}, posted-at = {2008-12-08 13:51:51}, priority = {2}, title = {Genotype and environment determine allocation to and costs of resistance in quaking aspen}, url = {http://dx.doi.org/10.1007/s00442-006-0373-8}, volume = {148}, year = {2006} }

TY - JOUR ID - citeulike:3757010 L3 - citeulike-article-id:3757010 N2 - Abstract  Although genetic variability and resource availability both influence plant chemical composition, little is known about how these factors interact to modulate costs of resistance, expressed as negative correlations between growth and defense. We evaluated genotype × environment effects on foliar chemistry and growth of quaking aspen (Populus tremuloides) by growing multiple aspen genotypes under variable conditions of light and soil nutrient availability in a common garden. Foliage was analyzed for levels of nitrogen, phenolic glycosides and condensed tannins. Bioassays of leaf quality were conducted with fourth-stadium gypsy moth (Lymantria dispar) larvae. Results revealed strong effects of plant genotype, light availability and nutrient availability; the importance of each factor depended upon compound type. For example, tannin concentrations differed little among genotypes and across nutrient regimes under low light conditions, but markedly so under high light conditions. Phenolic glycoside concentrations, in contrast, were largely determined by genotype. Variation in phenolic glycoside concentrations among genotypes was the most important factor affecting gypsy moth performance. Gypsy moth biomass and development time were negatively and positively correlated, respectively, with phenolic glycoside levels. Allocation to phenolic glycosides appeared to be costly in terms of growth, but only under resource-limiting conditions. Context-dependent trade-offs help to explain why costs of allocation to resistance are often difficult to demonstrate. IS - 2 JF - Oecologia EP - 303 TI - Genotype and environment determine allocation to and costs of resistance in quaking aspen VL - 148 SP - 293 KW - aspen KW - environment KW - genotype KW - resistance AU - Osier, Tod AU - Lindroth, Richard PY - 2006/06/01/ UR - http://dx.doi.org/10.1007/s00442-006-0373-8 ER -