Insect larvae fed on resistant Zea mays (corn) expressing maize insect resistant 1 cysteine protease (Mir1-CP) compensate for Mir1-CP degradation of their peritrophic membrane by altering expression of midgut transcripts as revealed through mRNA-seq

ABSTRACT: Native host plant insect resistance in the maize inbred line Mp708 was developed by traditional plant breeding. Resistant Mp708 thwarts feeding by fall armyworm (Spodoptera frugiperda [J.E. Smith]; Lepidoptera: Noctuidae), numerous other lepidopteran pests, and the coleopteran western corn rootworm. This broad resistance makes it an excellent model for studying native host plant resistance mechanisms. In response to caterpillar feeding, Mp708 rapidly mobilizes Mir1-CP, a unique cysteine protease that appears to translocate from roots to the maize midwhorl where it accumulates. This accumulation correlates with a significant reduction in caterpillar growth resulting from diminished food utilization. In addition, the peritrophic membrane (PM) that surrounds the food bolus in the mudgut

ORGANISM(S): Spodoptera frugiperda

SUBMITTER: Howard Fescemyer 

PROVIDER: E-GEOD-42659 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress