TIR-NBS-LRR genes are rare in monocots: evidence from diverse monocot orders.

ABSTRACT:

Background

Plant resistance (R) gene products recognize pathogen effector molecules. Many R genes code for proteins containing nucleotide binding site (NBS) and C-terminal leucine-rich repeat (LRR) domains. NBS-LRR proteins can be divided into two groups, TIR-NBS-LRR and non-TIR-NBS-LRR, based on the structure of the N-terminal domain. Although both classes are clearly present in gymnosperms and eudicots, only non-TIR sequences have been found consistently in monocots. Since most studies in monocots have been limited to agriculturally important grasses, it is difficult to draw conclusions. The purpose of our study was to look for evidence of these sequences in additional monocot orders.

Findings

Using degenerate PCR, we amplified NBS sequences from four monocot species (C. b

SUBMITTER: Tarr DE 

PROVIDER: S-EPMC2763876 | biostudies-literature | 2009 Sep

REPOSITORIES: biostudies-literature