Light-temperature characteristic of CO2-gaseous exchange in buckwheat plants

At the regulated conditions of polyfactor experiment the authors studied the influence of sunniness and temperature of air on intensity of net-photosynthesis and dark respiration in different species of plants and morphotypes of buckwheat at the three leaves stage. On the basis of regression analysis of experimental data the correlation between CO2-gaseous exchange in plants and of the environmental factors was estimated. The data obtained suggest about the divergence of Fagopyrum genus and intraspecial genetic diversity of Fagopyrum esculentum ssp. esculentum. During evolution, cultivation, ecological specialization and selection in buckwheat plants the intensity and productivity of photosynthesis, dark respiration, biological and seed productivity were raised significantly, that were due to the change of donor-acceptor relationship and first adaptive culture strategy - from competitive to ruderal type.