บทคัดย่องานวิจัย

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Banana ripening: processes governing carbon interconversion.

Beaudry, Randolph Mark.

Tesis Ph.D, University of Georgia, United States. 1989. 217 p.

1989

บทคัดย่อ

BANANA RIPENING: PROCESSES GOVERNING CARBON INTERCONVERSION.

This study was initiated to investigate several recent developments in plant physiology that relate to the postharvest physiology of ripening climacteric fruit.  Specifically, these developments are: (1) the discovery of pyrophosphate-dependent phosphofructokinase, an apparently ubiquitous plant enzyme that acts at a critical regulatory step in glycolysis; (2) the realization that fructose 2,6-bisphosphate is a potent activator of this enzyme and has the potential to regulate glycolysis in higher plants; (3) the discovery that the respiratory inhibitor, cyanide, is co-produced during the biosynthesis of ethylene; and (4) the presence of an hypothesis that links cyanide formed during ethylene biosynthesis with the instigation of the respiratory climacteric.  Implications of time-dependent changes in factors associated temporally and/or biochemically with carbon metabolism during the ripening of banana (Musa acuminata L.  (AAA group, Cavendish subgroup) cv.  Valery) fruit as they relate to the the

 se developments are discussed.  The data reveal that carbon flow in the ripening banana fruit is under complex regulation.  Processes implicated in governing carbon flow include changes in enzyme activity, fructose 2,6-bisphosphate levels, substrate availability, glycolytic intermediate levels and ATP production.  An hypothesis is presented on the regulation of respiration during ripening of banana.