Radiosensitivity of grapevines. II. Empirical modelling of the net photosynthesis and photorespiration of grapevines as affected by X-ray irradiation

Empirical models were utilized in depicting the net photosynthesis of grapevine clones resistant and sensitive to X-ray irradiation. It was revealed that the radiosensitivity of grapevine clones could involve an elevated level of net photosynthesis. This phenomenon could be coupled to lower photorespiration. An X-ray-inducted mechanism, opposite to that supposedly taking place in the dissipation of the excess of light, was hypothesized