Accumulation and variations of sulfhydryl compounds SH., reduced glutathione GSH. and catalase activity during the flower bud development cycle and their relationship were studied in two apricot cultivars, ‘S. Castrese’ and ‘Portici’, which differ in production behaviour in different years and environments. The changes in catalase activity, SH and GSH showed three distinct phases from November to February. In the first two phases, a gradual increase in catalase activity and reduced glutathione content was observed, paralleled by a decrease in total SH concentration. During phase 3 early February., at the same time with an increase in total SH and GSH, catalase activity showed a tendency to decrease. The two cultivars showed a difference in flower bud response, which was detected as early as the first observations in autumn. In particular, ‘S. Castrese’ was found to present constant and elevated catalase activity and a greater GSH content. q1998 Elsevier Science B.V.
Changes in SH-containing compounds and catalase activity in apricot flower bud during the winter season
VITI, RAFFAELLA;
1998-01-01
Abstract
Accumulation and variations of sulfhydryl compounds SH., reduced glutathione GSH. and catalase activity during the flower bud development cycle and their relationship were studied in two apricot cultivars, ‘S. Castrese’ and ‘Portici’, which differ in production behaviour in different years and environments. The changes in catalase activity, SH and GSH showed three distinct phases from November to February. In the first two phases, a gradual increase in catalase activity and reduced glutathione content was observed, paralleled by a decrease in total SH concentration. During phase 3 early February., at the same time with an increase in total SH and GSH, catalase activity showed a tendency to decrease. The two cultivars showed a difference in flower bud response, which was detected as early as the first observations in autumn. In particular, ‘S. Castrese’ was found to present constant and elevated catalase activity and a greater GSH content. q1998 Elsevier Science B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
