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Plos One : Crw1 - a Novel Maize Mutant Highly Susceptible to Foliar Damage by the Western Corn Rootworm Beetle, Volume 8

By Xu, Mingliang

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Book Id: WPLBN0003946128
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos One : Crw1 - a Novel Maize Mutant Highly Susceptible to Foliar Damage by the Western Corn Rootworm Beetle, Volume 8  
Author: Xu, Mingliang
Volume: Volume 8
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary)
Publication Date:
Publisher: Plos

Description : 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.


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