Resistance and tolerance in Populus tremuloides: genetic variation, costs, and environmental dependency Export

@article{citeulike:3755498, abstract = {Abstract\ \ Plants defend themselves against herbivores via resistance, which reduces damage, and tolerance, which minimizes the negative effects of damage. Theory predicts the existence of tradeoffs between defense and growth, as well as between resistance and tolerance, that could maintain the genetic variation for resistance and tolerance often observed in plant populations. We examined resistance and tolerance among aspen (Populus tremuloides) trees grown under divergent soil nutrient regimes. This common garden experiment revealed substantial genetic variation for resistance and tolerance under both low- and high-nutrient conditions. Costs of resistance exist, particularly under high-nutrient conditions where allocation to resistance chemicals competes directly with growth for limited carbon resources. We found no significant costs of tolerance, however, under either nutrient condition. Despite genetic variation for both resistance and tolerance, we found no evidence for a tradeoff between these two defense traits suggesting that resistance and tolerance are complementary, rather than mutually exclusive, defenses in aspen.}, author = {Stevens, Michael and Waller, Donald and Lindroth, Richard}, citeulike-article-id = {3755498}, citeulike-linkout-0 = {http://dx.doi.org/10.1007/s10682-006-9154-4}, citeulike-linkout-1 = {http://www.springerlink.com/content/b222446886m58005}, day = {1}, doi = {10.1007/s10682-006-9154-4}, journal = {Evolutionary Ecology}, keywords = {genetic, populus, resistance, tolerance, variation}, month = {November}, number = {6}, pages = {829--847}, posted-at = {2008-12-08 11:32:10}, priority = {2}, title = {Resistance and tolerance in Populus tremuloides: genetic variation, costs, and environmental dependency}, url = {http://dx.doi.org/10.1007/s10682-006-9154-4}, volume = {21}, year = {2007} }

TY - JOUR ID - citeulike:3755498 L3 - citeulike-article-id:3755498 N2 - Abstract  Plants defend themselves against herbivores via resistance, which reduces damage, and tolerance, which minimizes the negative effects of damage. Theory predicts the existence of tradeoffs between defense and growth, as well as between resistance and tolerance, that could maintain the genetic variation for resistance and tolerance often observed in plant populations. We examined resistance and tolerance among aspen (Populus tremuloides) trees grown under divergent soil nutrient regimes. This common garden experiment revealed substantial genetic variation for resistance and tolerance under both low- and high-nutrient conditions. Costs of resistance exist, particularly under high-nutrient conditions where allocation to resistance chemicals competes directly with growth for limited carbon resources. We found no significant costs of tolerance, however, under either nutrient condition. Despite genetic variation for both resistance and tolerance, we found no evidence for a tradeoff between these two defense traits suggesting that resistance and tolerance are complementary, rather than mutually exclusive, defenses in aspen. IS - 6 JF - Evolutionary Ecology EP - 847 TI - Resistance and tolerance in Populus tremuloides: genetic variation, costs, and environmental dependency VL - 21 SP - 829 KW - genetic KW - populus KW - resistance KW - tolerance KW - variation AU - Stevens, Michael AU - Waller, Donald AU - Lindroth, Richard PY - 2007/11/01/ UR - http://dx.doi.org/10.1007/s10682-006-9154-4 ER -