Diospyros virginiana Diospyros virginiana Diospyros virginiana is a persimmon species commonly called the American persimmon, common persimmon, eastern persimmon, "simmon", "possumwood", "possum apples", or "sugar-plum". It ranges from southern Connecticut/Long Island to Florida, and west to Texas, Louisiana, Oklahoma, Kansas, and Iowa. The tree grows wild but has been cultivated for its fruit and wood since prehistoric times by Native Americans. "Diospyros virginiana" grows through , in well-drained soil. In summer, this species produces fragrant flowers which are dioecious, so one must have both male and female plants to obtain fruit. Most cultivars are parthenocarpic (setting seedless fruit without pollination). The flowers
Genetically modified tomato cold and drought tolerance in transgenic "Arabidopsis thaliana" plants, was inserted into the tomato. This resulted in increased drought tolerance, but did not appear to have any effect on cold tolerance. Overexpressing a vacuolar Na/H antiport ("AtNHX1") from "A. thaliana" lead to salt accumulating in the leaves of the plants, but not in the fruit and allowed them to grow more in salt solutions than wildtype plants. They were the first salt-tolerant, edible plants ever created. Tobacco osmotic genes overexpressed in tomatoes produced plants that held a higher water content than wildtype plants increasing tolerance to drought and salt stress.