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Reprinted from pages 251-268 in A. A. Agrawal, S. Tuzun, and E. Bent, editors. Inducible plant defenses against pathogens and
 

Summary: 251
Reprinted from pages 251-268 in A. A. Agrawal, S. Tuzun, and E.
Bent, editors. Inducible plant defenses against pathogens and
herbivores: Biochemistry, ecology, and agriculture. American
Phytopathological Society Press, St. Paul, MN (USA).
Induced Plant Defense: Evolution of Induction and Adaptive
Phenotypic Plasticity
Anurag A. Agrawal
Abstract
Induced defenses may evolve in natural plant populations where
heritable variation in inducibility affects plant fitness. Although this has not
been documented for any plant parasite system, genetic variation in induction
has been recently reported for several plant-parasite systems. Correlations
between induction and fitness in variable parasite environments suggest that
inducibility may indeed be subject to selection, however, these studies focussed
on phenotypic (not genetic) correlations. Our current state of knowledge
suggests that induced defenses may be an example of adaptive plasticity, where
defenses enhance plant fitness when parasites are present, and reduce fitness
when parasites are absent. Future work that focuses on consequences of genetic
variation in induction and macro-evolutionary trends in inducible versus

  

Source: Agrawal, Anurag - Department of Ecology and Evolutionary Biology & Entomollogy, Cornell University

 

Collections: Environmental Sciences and Ecology