Genetic Strategies to Improve Resistance to Biotic Stresses in Plants
Pp. 295-361 (67)
Stefano Sangiorgio and Mario Motto
The long-term target of improving crops resistance to biotic stresses is a
familiar goal for breeders. Plants ought to constantly protect themselves versus
aggressions from a wide spectrum of organisms that include viruses, bacteria,
oomycetes, fungi, insects and other herbivores, and weeds. In this chapter attention will
be given to depict a picture on the genetic and molecular mechanisms that plants have
promoted to recognize and react to invasion by numerous parasites (pathogens and
pests). These topics include non-host resistance, constitutive barriers, and race-specific
resistance. The chapter also examines current progresses in clarifying the structure and
molecular devices developed by plants to neutralize pathogen and pest aggressions.
Moreover, it takes a look with aspects experienced in breeding for resistance to
relevant biotic stress factors. Major considerations in breeding for resistance to
pathogens, insect pests, and weeds, traditional sources of resistance or other possible
strategies, such as mutation breeding, genetic manipulations, and molecular strategies
to develop crops more resistant to parasites are also explored.
Defense mechanisms, Genetic basis of resistance, Pathogenesis
related proteins, Signal transduction network, Transgenic plants.
Fondazione Istituto Tecnico Superiore per le nuove Tecnologie della Vita, Bergamo, Italy