What question did this study set out to answer?

To examine seasonal variations and physiological roles of sorbitol-metabolizing enzymes and acid invertase during the development and maturation of Japanese pear fruit.

January 1, 1989Journal of the Japanese Society for Horticultural ScienceOpen Access

Seasonal Fluctuation of Sorbitol-related Enzymes and Invertase Activities Accompanying Maturation of Japanese Pear (Pyrus serotina Rehder var. culta Rehder) Fruit

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To examine seasonal variations and physiological roles of sorbitol-metabolizing enzymes and acid invertase during the development and maturation of Japanese pear fruit.
Measured the enzymatic activities of NAD+-dependent sorbitol dehydrogenase, sorbitol oxidase, NADP+-dependent sorbitol dehydrogenase, sorbitol-6-P dehydrogenase, and acid invertase in developing Japanese pear (Pyrus serotina) fruit.
Tracked enzyme activity shifts across consecutive developmental stages, spanning initial fruit growth in June, expansion, and final maturation.
NAD+-dependent sorbitol dehydrogenase exhibited the highest activity among sorbitol-related enzymes throughout the season, rising in June, decreasing during fruit expansion, and increasing again at maturation in parallel with fructose accumulation.
Acid invertase maintained distinctly higher activity than all sorbitol-metabolizing enzymes across development, whereas sorbitol oxidase exhibited roughly one-tenth the activity of NAD+-dependent sorbitol dehydrogenase, and both NADP+-dependent sorbitol dehydrogenase and sorbitol-6-P dehydrogenase showed minimal activity.

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Implication

Biochemical analysis reveals distinct seasonal fluctuations in sorbitol-related enzymes and invertase in Japanese pear fruit, highlighting their central role in sugar accumulation.

Cite This Study

Yamaki et al. (1989) studied this question.

synapsesocial.com/papers/6a9a4bda63f9dbee96a0c49b https://doi.org/10.2503/jjshs.57.602

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Implication

Biochemical analysis reveals distinct seasonal fluctuations in sorbitol-related enzymes and invertase in Japanese pear fruit, highlighting their central role in sugar accumulation.

Seasonal Fluctuation of Sorbitol-related Enzymes and Invertase Activities Accompanying Maturation of Japanese Pear (Pyrus serotina Rehder var. culta Rehder) Fruit

Key Points

Discussion

Implication

Cite This Study

Seasonal Fluctuation of Sorbitol-related Enzymes and Invertase Activities Accompanying Maturation of Japanese Pear (Pyrus serotina Rehder var. culta Rehder) Fruit

Key Points

Discussion

Implication

Cite This Study

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