Phenotypic characterization of <i>TMK</i> mutants and wild type Arabidopsis show that the <i>TMK</i> Genes Act Redundantly to Regulate Diverse Aspects of Plant Growth and Development.

<p>(A) Four day-old light grown seedlings (wild type COL; <i>tmk1; tmk4</i> double mutant; <i>tmk1; tmk3; tmk4</i> triple mutant). (B) Four day-old etiolated seedlings (wild type COL; <i>tmk1; tmk4</i> double mutant; <i>tmk1; tmk3; tmk4</i> triple mutant). (C) 4 week-old wild-type plant. (D) 4 week-old tm<i>k1; tmk4</i> double mutant. (E) 4 week-old <i>tmk1; tmk3; tmk4</i> triple mutant. (F) Inflorescence of wild type (left) and quadruple mutant (right). Note sterility. (G) Developing flowers of wild type (left) and quadruple mutant (right). (H) Developing silique of wild type. (I) Developing silique of <i>tmk1; tmk4</i> double mutant. (J) Developing silique of <i>tmk1; tmk3; tmk4</i> triple mutant. (K) Developing silique of quadruple mutant showing infertility. (L) Rosette of four week old wild type plant. (M) Rosette of four week old <i>tmk1; tmk4</i> double mutant plants. (N) Recovery of <i>tmk1; tmk4</i> phenotype by gTMK1. (O) Recovery of <i>tmk1; tmk4</i> phenotype by gTMK4. Scale bars: 5 mm for (A)–(G) and (L)–(O); 0.5 mm for (H)–(K).