Phenotypic characterization of the Tnt1-tagged M. truncatula mutant line NF2089. A, Natural senescence of leaves at the bottom of wild-type and NF2089 plants after 60 d of growth. B, Natural senescence of wild-type and NF2089 plants. C, Color change in mature anthers and central carpels of wild-type and NF2089 plants. D, Mature pods of wild-type and NF2089 plants. E, Mature seeds of wild-type and NF2089 plants.