Arabidopsis Biological Resource Center

Ploidy: 2

Phenotype: Embryo lethal; viviparous embryos with cotyledons partially transformed into leaves; embryos sensitive to abscisic acid; embryos have reduced hypocotyl, cotyledons that remain green late in development; reduced protein and lipid bodies with starch being predominant storage product in mutant embryos. Trichomes form on cotyledons after germination; internal cells of cotyledons enlarge, vacuolate and resemble leaf mesophyll cells; intercellular spaces are prominant in cotyledons; enlarged shoot apical meristem; stomata are found on surface of cotyledons of mutant embryos; mature seeds are desiccation intolerant, however, immature seeds can be rescued before silique drying and germinated to produce seedlings. Root apex is active in viviparous seeds; immature mutant embryos germinated prior to desiccation produce plants that appear normal for other characteristics.