Cytosolic antioxidant enzymes are a target to give durable resistance to water stress in commercial plum trees. Diaz-Vivancos et al. show improved tolerance to moderate or severe drought in transgenic lines, correlating with reduced leaf-drop, better photosynthetic performance (PSII quantum yield) and a tighter control of water use efficiency.
The two lines transformed with multiple copies of superoxide dismutase and ascorbate peroxidase genes suggested an enhanced capacity to cope with drought-induced oxidative stress. The transformed lines may be a valuable rootstock for improving plum crop yields in adverse environments.
Pedro Diaz-Vivancos, Lydia Faize, Emilio Nicolás, Maria José Clemente-Moreno, Roque Bru-Martinez, Lorenzo Burgos, José Antonio Hernández, 2016, 'Transformation of plum plants with a cytosolic ascorbate peroxidase transgene leads to enhanced water stress tolerance', Annals of Botany, vol. 117, no. 7, pp. 1121-1131 http://dx.doi.org/10.1093/aob/mcw045