TIR-NB-LRR receptor-like protein that functions in photomorphogenic development. May function downstream of phytochrome B (phyB) signaling. H2O + NAD(+) = ADP-D-ribose + H(+) + nicotinamide The TIR domain mediates NAD(+) hydrolase (NADase) activity. Self-association of TIR domains is required for NADase activity. Shade avoidance phenotype in the absence of shade and enhanced growth of the bacterial pathogen P.syringae pv. tomato DC3000 (avirulent avrRpt2 strain). The constitutive shade avoidance phenotype can be rescued by RPS4, a TIR-NBS-LRR protein that confers resistance against bacterium Pseudomonas syringae.