Life Sciences Commons^™

Growth, Sucrose Synthase, And Invertase Activities Of Developing Phaseolus Vulgaris L. Fruits, S. Sung, Wen-Jang Shieh, Donald Geiger, Clanton Black

Donald R. Geiger

Activities of the sucrose-cleaving enzymes, acid and neutral invertase and sucrose synthase, were measured in pods and seeds of developing snap bean (Phaseolus vulgaris L.) fruits, and compared with 14C-import, elongation and dry weight accumulation. During the first 10 d post-anthesis, pods elongated rapidly with pod dry weight increase lagging behind by several days. The temporal patterns of acid invertase activity and import coincided closely during the first part of pod development, consonant with a central role for this enzyme in converting imported sucrose during pod elongation and early dry weight accumulation. Later, sucrose synthase became the predominant enzyme of …