tripp Mutant Exhibits Dwarfism and Sterility.

(A) Gene model of Arabidopsis TRIPP/AT3G17900 showing that the T-DNA insertion (Salkseq_063596) of tripp-1 is located in the fifth exon.

(B) Two-week-old tripp-1 plants grown under a 16-h-light/8-h-dark cycle show smaller rosettes than the wild-type (WT) and 35S:TRIPP-YFP/tripp-1 plants (TRIPP-YFP/tripp-1). Bar = 1 cm.

(C) Five-week-old tripp-1 plants grown under a 16-h-light/8-h-dark cycle exhibit significantly shorter inflorescences than the wild-type (WT) and TRIPP-YFP/tripp-1 plants. Bar = 1 inch.

(D)  tripp-1 flowers appear normal, but their anthers lack pollen. Insets in the bottom panel show magnified images of anthers. WT, wild type.

(E) Morphology of mature siliques from 7-week-old tripp-1 plants compared to the wild type (WT) and complemented plants.

(F) and (G)  tripp-1 plants show shorter roots (F) and stunted growth (G) than the wild type (WT) but weaker phenotypes than trs33-1. Bar = 1 cm.

(H) Both the tripp-1 and trs33-1 mutants exhibit complete sterility at 6 weeks old. Bar = 1 inch.