Effect of Environmental Conditions on the α-Glucosidase Inhibitory Activity of Mulberry Leaves | Zendy

Hiromitsu Nakanishi | Zendy; Shinji Onose | Zendy; Eriko Kitahara | Zendy; Sukunya Chumchuen | Zendy; Midori Takasaki | Zendy; Hajime Konishi | Zendy; Rensuke Kanekatsu | Zendy

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Effect of Environmental Conditions on the α-Glucosidase Inhibitory Activity of Mulberry Leaves

Author(s) -

Hiromitsu Nakanishi,

Shinji Onose,

Eriko Kitahara,

Sukunya Chumchuen,

Midori Takasaki,

Hajime Konishi,

Rensuke Kanekatsu

Publication year - 2011

Publication title -

bioscience biotechnology and biochemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.509

H-Index - 116

eISSN - 1347-6947

pISSN - 0916-8451

DOI - 10.1271/bbb.110407

Subject(s) - inhibitory postsynaptic potential , insect , biology , photoperiodism , alpha glucosidase , herbivore , shoot , meliaceae , botany , chemistry , enzyme , biochemistry , neuroscience

Mulberry leaves have been used as the sole food for silkworms in sericulture, and also as a traditional medicine for diabetes prevention. Mulberry leaf components, for example 1-deoxynojirimycin (1-DNJ), inhibit the activity of α-glucosidase and prevent increased blood glucose levels, and they are highly toxic to caterpillars other than silkworms. The α-glucosidase inhibitory activity of mulberry leaves changes with the season, but it is unknown which environmental conditions influence the α-glucosidase inhibitory activity. We investigated in this study the relationship between the α-glucosidase inhibitory activity and environmental conditions of temperature and photoperiod. The results demonstrate that low temperatures induced decreasing α-glucosidase inhibitory activity, while the induction of newly grown shoots by the scission of branches induced increasing α-glucosidase inhibitory activity. These results suggest that the α-glucosidase inhibitory activity was related to the defense mechanism of mulberry plants against insect herbivores.

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