Changes in Photosynthesis and Respiration during Berry Development in Relation to the Ripening of Delaware Grapes

摘要: The relationship between berry growth and changes in respiratory rate photosynthetic CO2-assimilation during the development of grape berries seeds was studied relation to their ripening.(1) terms dry weight basis became high at an early part Stage I thereafter decreased rapidly. When expressed on a single basis, re ate increased rapidly through III, but there sudden drop veraison.(2) gross-photosynthesis showed its peak thereafter. two peaks, i.e., later III.(3) per seed onset II. While, respiration highest thereafter.These results led assumption that activity may affect markedly stages growth, second play important physiological role controlling ripening.