The productivity of a plant can be influenced in various different ways, e.g. by improving plant growth characteristics or by delaying leaf senescence. Cytokinins are a class of plant hormones controlling numerous aspects of plant development throughout the life cycle.
The present invention relates to two novel gain-of-function variants of the cytokinin receptors AHK2 and AHK3, namely rock2 and rock3 of Arabidopsis, to transgenic organisms comprising at least one of said new gain-of-function cytokinin receptor variants and to a method for the manufacturing of a transgenic plant comprising at least one of the new gain-of-function variants.