crw1--A novel maize mutant highly susceptible to foliar damage by the western corn rootworm beetle.
Western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is the most destructive insect pest of corn (Zea mays L.) in the United States. The adult WCR beetles derive their nourishment from multiple sources including corn pollen and silks as well as the pollen of alternate hosts. Conversely, the corn foliage is largely neglected as a food source by WCR beetles, leading to a perception of a passive interaction between the two. We report here a novel recessive mutation of corn that was identified and named after its foliar susceptibility to corn rootworm beetles (crw1). The crw1 mutant under field conditions was exceptionally susceptible to foliar damage by WCR beetles in an age-specific manner. It exhibits pleiotropic defects on cell wall biochemistry, morphology of leaf epidermal cells and lower structural integrity via differential accumulation of cell wall bound phenolic acids. These findings indicate that crw1 is perturbed in a pathway that was not previously ascribed to WCR susceptibility, as well as implying the presence of an active mechanism(s) deterring WCR beetles from devouring corn foliage. The discovery and characterization of this mutant provides a unique opportunity for genetic analysis of interactions between maize and adult WCR beetles and identify new strategies to control the spread and invasion of this destructive pest.
Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana, USA.
Bala Puchakayala
BP
Venkata
Nick
N
Lauter
Xu
X
Li
Clint
C
Chapple
Christian
C
Krupke
Gurmukh
G
Johal
Stephen
S
Moose
D000818:Animals; D002473:Cell Wall / Q000737:chemistry / Q000378:metabolism / Q000469:parasitology; D001517:Coleoptera / Q000472:pathogenicity / Q000502:physiology*; D003373:Coumaric Acids / Q000378:metabolism; D006790:Host-Parasite Interactions; D062385:Hydroxybenzoates / Q000378:metabolism; D009154:Mutation; D059828:Plant Cells / Q000737:chemistry / Q000378:metabolism / Q000469:parasitology; D010935:Plant Diseases / Q000235:genetics* / Q000276:immunology / Q000469:parasitology; D057865:Plant Immunity / Q000235:genetics*; D018515:Plant Leaves / Q000235:genetics* / Q000276:immunology / Q000469:parasitology; D010940:Plant Proteins / Q000235:genetics* / Q000276:immunology; D003313:Zea mays / Q000235:genetics* / Q000276:immunology / Q000469:parasitology
D003373:Coumaric Acids; D062385:Hydroxybenzoates; D010940:Plant Proteins; C017616:phenolic acid