Studies on the growth behaviour of cucumber, Cucumis sativus L. I. : The types of sex expression and its sensitivity to various daylength and temperature conditions

Abstract

gent croping systems, it seems quite necessary to begin l&h the dctailed genecological studies on the problems of sex expression. The present authors have engaged on the studies to make clear the sex expression, the development of the nodal phase of staminate and pistillate flowers and its mode of variation, using 25 cultivars, in total, which belong to 4 different ecotypes, i. e., South Chinese variety-complex, North Chinese variety-complex, Hibrid variety-complex and European varietycomplex (Fig. Various combinations of the daylength and temperature in the Phytotron at Kyushu University were applied throughout. Climatic conditions in these experiments have been accomplished by varying the light-temperature comlex.