Abstract
Banana cannot be preserved for a long time after harvesting due to a short shelf life. Fruit softening is associated with textural changes due to disassembly of the primary cell wall and modification of the structure and composition of various polysaccharides. Cell wall degradation is caused by the action of various cell wall hydrolase enzymes. Polygalacturonase (PG) is the key enzyme involved in this process. The ripening period is different in cultivars maintained under domesticated cultivation in Kerala. PG activity was profiled in eight Musa acuminata cultivars from Kerala and expression analysis of the PG gene was accomplished using semi-quantitative RT-PCR. Maximum PG activity was observed in Palayankodan and minimum activity was observed in Kadali. Gene expression analysis showed variation between ethylene treated fruits and controls in Palayankodan, whereas the expression patterns in Kadali were similar. The fruit softening process is cultivar specific.
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