ISHS Acta Horticulturae 505: VII International Symposium on Rubus and Ribes
A CAUSAL ROLE FOR ETHENE IN RASPBERRY FRUIT RIPENING |
| Authors: | P. Iannetta, J. Van den Berg, R. Wheatley, G. McMillan, R. McNicol, H. Davies |
| Keywords: | Rubus idaeus, softening, polygalacturonase, cellulase, pectin methylesterase, B-galactosidase |
| Abstract:
Different stages of raspberry fruit development were used to quantify fruit firmness, rate of ethene evolution and ripening rate. Firmness differences correlated with levels of ethene evolution and receptacle weight. Fruit respiration declined as ripening progressed. The activities of four cell-wall modifying enzymes: polygalacturonase (PG); pectin methylesterase (PME); Cx-cellulase (Cx); and B-galactosidase (B-gal.) increased during ripening and major isoforms were identified for each of the enzymes assayed. Application of exogenous ethene to green fruits enhanced ripening rate. | |
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