post-harvest-biology
Post-harvest biology is the study of the physiological, biochemical, and molecular processes that occur in plant tissues after they are separated from the parent plant. Understanding these processes—such as ripening, senescence, respiration, and cell wall degradation—is critical for plant scientists seeking to extend shelf life, reduce food waste, and maintain nutritional quality. Research in this field also illuminates fundamental aspects of plant aging and hormone signaling, particularly the roles of ethylene and abscisic acid in coordinating tissue breakdown.
PubMed · 2026-04-01
A new review examines how fruits use special 'alternative' energy pathways in their cells during growth and ripening, revealing these pathways are critical for maintaining metabolic balance rather than just being biochemical sideshows.
Alternative respiratory pathways — including alternative oxidase, uncoupling proteins, and type II NAD(P)H dehydrogenases — are now recognized as central regulators of fruit ripening, not minor metabolic curiosities.
These pathways support both primary metabolism (energy production) and secondary metabolism (flavor compounds, pigments, antioxidants) by maintaining redox and energy balance in fruit cells.
The classical climacteric vs. non-climacteric fruit distinction is being revisited in light of new evidence about how these alternative mitochondrial components function differently across fruit types.