Okinawa, Japan

Minami Kyushu University
Okinawa, Japan

Minami Kyushu University is a private university in Miyazaki, Miyazaki, Japan. The predecessor of the school was founded in 1962, and it was chartered as a university in 1967. Wikipedia.

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Shintani Y.,Minami Kyushu University | Terao M.,Minami Kyushu University | Tanaka S.,National Institute of Agro biological science at Ohwashi
Journal of Insect Physiology | Year: 2017

Larvae of the bean blister beetle, Epicauta gorhami Marseul (Coleoptera: Meloidae), feed on grasshopper eggs in soil and undergo hypermetamorphosis. They normally enter diapause as a pseudopupa at the fifth instar, a form characteristic of hypermetamorphosis for meloid beetles. However, fourth-instar larvae exposed to long days and high temperature avoid pseudopupal diapause and pupate directly from the fourth instar. Fourth-instar larvae also tend to pupate precociously with a smaller body size if they are deprived of food. In these larvae, the critical day-length controlling induction of pseudopupal diapause becomes shorter than that for fully-fed larvae. In this study, we examined how the reaction norm of food-deprived E. gorhami larvae functions in nature by rearing insects from the egg stage outdoors in different seasons with manipulation of the food supply. The results indicated that most fully-fed larvae entered pseudopupal diapause, whereas food-deprived larvae tended to pupate precociously without entering diapause, especially early in the season. The resulting smaller adults reproduced early in the autumn and their progeny attained the pseudopupal stage before winter, indicating that the reaction norm may have an adaptive role in controlling seasonal development in the face of food shortages, producing a bivoltine life cycle. © 2017

Tatsuzawa F.,Iwate University | Saito N.,Hoshi University | Toki K.,Minami Kyushu University | Shinoda K.,Japan National Agriculture and Food Research Organization | Honda T.,Hoshi University
Journal of the Japanese Society for Horticultural Science | Year: 2012

The flower colors and anthocyanin constitution of eight cultivars of Vintage series bedding Stock (Matthiola incana) were surveyed to determine the relation between their flower colors and anthocyanin components. Thirteen anthocyanins were isolated from the flowers of these cultivars as major anthocyanins, and their structures were identified by chemical and spectroscopic techniques. Among them, a novel anthocyanin, cyanidin 3-caffeoyl-sambubioside-5-malonyl-glucoside (pigment 1) was found in single and double flowers in cultivars of 'Vintage Lavender' and 'Vintage Burgundy'. Furthermore, two anthocyanins, cyanidin 3-p-coumaroyl-sambubioside-5-malonyl-glucoside (pigment 2) and cyanidin 3-feruloyl-sambubioside-5-malonyl-glucoside (pigment 3), were also found in these cultivars for the first time in Matthiola incana flowers. Regarding the flower color variation in these cultivars, the hue values (b*/a*) of these flower colors were roughly responsible for the numbers of hydroxycinnamic acid residues in anthocyanin molecules and also hydroxyl patterns of the B-ring in anthocyanidins. These flower colors were classified into eight groups, A-H, based on the hue values of their flowers, and were arranged as follows. In violet flowers (hue values b*/a* = -0.66 and -0.69, V 84A) of group A, cyanidin 3-dihydroxycinnamoyl-sambubioside-5-malonyl-glucosides were major anthocyanin pigments. In purple flowers (-0.43 and -0.45, P 75A) and red-purple flowers (-0.14 and -0.16, RP 74A) of groups B and D, pelargonidin 3-dihydroxycinnamoyl-sambubioside-5-malonyl-glucosides were major anthocyanin pigments. In red-purple flowers (-0.21 and -0.24, RP 72A) of group C, cyanidin 3-monohydroxycinnamoyl-sambubioside-5-malonyl-glucosides were major anthocyanin pigments. In red flowers (0.05 and 0.06, RP 66A) of group E, pelargonidin 3-monohydroxycinnamoyl-sambubioside-5-malonyl-glucosides were major anthocyanin pigments. In copper (0.23 and 0.16, R 54A) and peach (2.37 and 2.09, R38C) of groups F and G, pelargonidin 3-glucoside was a major anthocyanin pigment, and a small amount of pelargonidin 3-glucoside was present in yellow flowers of group H. From these results, the relation between flower colors and the bluing effects of acylated anthocyanins with hydroxycinnamic acids was discussed in flowers of Matthiola incana cultivars of Vintage series. © 2012.

Saito N.,Hoshi University | Tatsuzawa F.,Iwate University | Toki K.,Minami Kyushu University | Shinoda K.,Japan National Agricultural Research Center | And 2 more authors.
Phytochemistry | Year: 2011

Six acylated delphinidin glycosides (pigments 1-6) and one acylated kaempferol glycoside (pigment 9) were isolated from the blue flowers of cape stock (Heliophila coronopifolia) in Brassicaceae along with two known acylated cyanidin glycosides (pigments 7 and 8). Pigments 1-8, based on 3-sambubioside-5-glucosides of delphinidin and cyanidin, were acylated with hydroxycinnamic acids at 3-glycosyl residues of anthocyanidins. Using spectroscopic and chemical methods, the structures of pigments 1, 2, 5, and 6 were determined to be: delphinidin 3-O-[2-O-(β-xylopyranosyl)-6-O-(acyl)- β-glucopyranoside]-5-O-[6-O-(malonyl)-β-glucopyranoside], in which acyl moieties were, respectively, cis-p-coumaric acid for pigment 1, trans-caffeic acid for pigment 2, trans-p-coumaric acid for pigment 5 (a main pigment) and trans-ferulic acid for pigment 6, respectively. Moreover, the structure of pigments 3 and 4 were elucidated, respectively, as a demalonyl pigment 5 and a demalonyl pigment 6. Two known anthocyanins (pigments 7 and 8) were identified to be cyanidin 3-(6-p-coumaroyl-sambubioside)-5-(6-malonyl- glucoside) for pigment 7 and cyanidin 3-(6-feruloyl-sambubioside)-5-(6-malonyl- glucoside) for pigment 8 as minor anthocyanin pigments. A flavonol pigment (pigment 9) was isolated from its flowers and determined to be kaempferol 3-O-[6-O-(trans-feruloyl)-β-glucopyranoside]-7-O-cellobioside-4′-O- glucopyranoside as the main flavonol pigment. On the visible absorption spectral curve of the fresh blue petals of this plant and its petal pressed juice in the pH 5.0 buffer solution, three characteristic absorption maxima were observed at 546, 583 and 635 nm. However, the absorption curve of pigment 5 (a main anthocyanin in its flower) exhibited only one maximum at 569 nm in the pH 5.0 buffer solution, and violet color. The color of pigment 5 was observed to be very unstable in the pH 5.0 solution and soon decayed. In the pH 5.0 solution, the violet color of pigment 5 was restored as pure blue color by addition of pigment 9 (a main flavonol in this flower) like its fresh flower, and its blue solution exhibited the same three maxima at 546, 583 and 635 nm. On the other hand, the violet color of pigment 5 in the pH 5.0 buffer solution was not restored as pure blue color by addition of deacyl pigment 9 or rutin (a typical flower copigment). It is particularly interesting that, a blue anthocyanin-flavonol complex was extracted from the blue flowers of this plant with H 2O or 5% HOAc solution as a dark blue powder. This complex exhibited the same absorption maxima at 546, 583 and 635 nm in the pH 5.0 buffer solution. Analysis of FAB mass measurement established that this blue anthocyanin-flavonol complex was composed of one molecule each of pigment 5 and pigment 9, exhibiting a molecular ion [M+1] + at 2102 m/z (C 93H 105O 55 calc. 2101.542). However, this blue complex is extremely unstable in acid solution. It really dissociates into pigment 5 and pigment 9. © 2011 Elsevier Ltd. All rights reserved.

Terao M.,Minami Kyushu University | Hirose Y.,Minami Kyushu University | Shintani Y.,Minami Kyushu University
Journal of Insect Physiology | Year: 2012

Larvae of the bean blister beetle, . Epicauta gorhami (Coleoptera: Meloidae), feed on grasshopper eggs in soil and undergo hypermetamorphosis. This beetle undergoes larval diapause in the fifth instar as a pseudopupa, a form characteristic of hypermetamorphosis in meloid beetles. This pseudopupal diapause is maintained for a long period if the larvae are kept under continuous diapause-inducing short-day conditions. In the present study, the effects of temperature and photoperiod on termination of pseudopupal diapause in . E. gorhami were examined using pseudopupae obtained under 12L-12D at 25. °C. Diapause was terminated by exposure to low or high temperature, but not by transfer to long-day conditions. The pseudopupal stage comprises diapause and post-diapause phases despite its unchanging appearance. The optimum low temperature for diapause termination was 10-15. °C, and a higher or lower temperature was less effective. There was an individual variation in the low temperature requirement for diapause termination and post-diapause development may not occur until this requirement is satisfied. Although under natural conditions pseudopupae may encounter low temperatures that are effective for diapause termination at different ages, our results show that pseudopupae at various ages respond similarly to low temperature exposure. This response may ensure that resumption of development synchronizes in a population. © 2012.

An automatic drip irrigation system based on sap flow rate measured by the heat pulse method was developed and examined for sweet pepper cultivation. When the accumulated sap flow rates reached a certain point, irrigation was executed at an intensity of 40 ml min-1. In this study, 3 irrigation plots, (1 L, 3 L, and 4.5 L), were examined for sweet pepper cultivation and compared with a general automatic irrigation system based on soil moisture monitoring, determined by a soil moisture sensor. Automatic drip irrigation systems based on soil moisture measurement have a tendency to decrease crop transpiration under high atmospheric demand conditions. Two approaches to avoid this decrease were investigated; one approach was based on the location of drip points and the other approach was based on applying supplemental irrigation in various ways. Measurements of solar radiation were used to control additional watering under high evaporative conditions. The supplemental irrigation system adopted in this study had positive practical results without significant reduction in transpiration due to water stress.

Nishizaki Y.,Tokyo University of Agriculture and Technology | Yasunaga M.,Tokyo University of Agriculture and Technology | Okamoto E.,Tokyo University of Agriculture and Technology | Okamoto M.,Ehime Research Institute of Agriculture | And 5 more authors.
Plant Cell | Year: 2013

The blue color of delphinium (Delphinium grandiflorum) flowers is produced by two 7-polyacylated anthocyanins, violdelphin and cyanodelphin. Violdelphin is derived from the chromophore delphinidin that has been modified at the 7-position by Glc and p-hydroxybenzoic acid (pHBA) molecules. Modification of violdelphin by linear conjugation of Glc and pHBA molecules to a Glc moiety at the 7-position produces cyanodelphin. We recently showed that anthocyanin 7-O-glucosylation in delphinium is catalyzed by the acyl-Glc-dependent anthocyanin glucosyltransferase (AAGT). Here, we sought to answer the question of which enzyme activities are necessary for catalyzing the transfer of Glc and pHBA moieties to 7-glucosylated anthocyanin. We found that these transfers were catalyzed by enzymes that use p-hydroxybenzoyl-Glc (pHBG) as a bifunctional acyl and glucosyl donor. In addition, we determined that violdelphin is synthesized via step-by-step enzymatic reactions catalyzed by two enzymes that use pHBG as an acyl or glucosyl donor. We also isolated a cDNA encoding a protein that has the potential for p-hydroxybenzoylation activity and two AAGT cDNAs that encode a protein capable of adding Glc to delphinidin 3-Orutinoside- 7-O-(6-O-[p-hydroxybenzoyl]-glucoside) to form violdelphin. © 2013 American Society of Plant Biologists.

Shintani Y.,Minami Kyushu University | Hirose Y.,Minami Kyushu University | Terao M.,Minami Kyushu University
Physiological Entomology | Year: 2011

Larvae of the bean blister beetle Epicauta gorhami Marseul (Coleoptera: Meloidae) feed on grasshopper eggs in soil and undergo hypermetamorphosis. This beetle undergoes larval diapause in the fifth instar as a pseudopupa, a form characteristic of hypermetamorphosis in meloid beetles. The effects of temperature, photoperiod and soil humidity on larval development of E. gorhami are examined in a population in Miyazaki, Japan, using egg pods of Locusta migratoria L. as food. At lower temperatures (20 and 22.5 °C), all larvae become pseudopupae, regardless of the photoperiod. By contrast, at higher temperatures (27.5 and 30 °C), almost all larvae pupate at the end of the fourth instar, again regardless of the photoperiod. A long-day photoperiodic response occurs only at an intermediate temperature (25 °C): under an LD 12 12 h photocycle, all larvae enter diapause, although the diapause incidence tends to decrease as the day length becomes longer. Pseudopupae are immobile and remain in diapause for ≥120 days when they are kept under the same conditions, except that diapause terminates within a relatively short time at 30 °C. Although lower soil humidity retards post-feeding development, soil humidity has no effect on the diapause incidence. On the basis of the short developmental period and diapause avoidance under summer conditions, it is suggested that this beetle partially produces two generations a year in southwestern Japan. © 2010 The Authors. Physiological Entomology © 2010 The Royal Entomological Society.

Kusudo T.,Chubu University | Kontani Y.,Minami Kyushu University | Kataoka N.,Chubu University | Ando F.,Aichi Shukutoku University | And 2 more authors.
Genes to Cells | Year: 2011

We studied the relationship between fatty acid-binding protein 3 (FABP3) and obesity in vivo and the effects of FABP3 on signal transduction for glucose uptake in skeletal muscle cells in vitro. In obese mice, the level of FABP3 protein in gastrocnemius muscles increased significantly with an increase in body weight and metabolic phenotypes, suggesting a close relationship between FABP3 expression in the muscle and the development of obesity and/or insulin resistance in mice. In experiments using C2C12 myotubes infected with adenoviruses encoding human FABP3, induction stimulated glucose uptake without insulin stimulation in parallel with increases in the phosphorylation of AMP-activated protein kinase (AMPK) and AS160. Insulin enhanced glucose uptake in an additive fashion with increased phosphorylation of Akt and AS160 in FABP3-induced myotubes compared to control cells. This increased glucose uptake in FABP3-induced myotubes with insulin stimulation was found even in the presence of palmitate, in which a significantly higher Akt phosphorylation was detected compared to controls. These results suggest that FABP3 stimulates glucose uptake by facilitating AMPK-dependent AS160 phosphorylation in skeletal muscle. FABP3 may also contribute to AS160 phosphorylation by maintaining insulin-dependent Akt activation in the cells under a lipotoxic condition. © 2011 The Authors. Journal compilation © 2011 by the Molecular Biology Society of Japan/Blackwell Publishing Ltd.

Hayashi N.,Minami Kyushu University
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2013

This paper proposes a knowledge management based on social action research for Gardening and Ornamental Affective Engineering (GOAE) on stress relief with social networking program for improving social-welfare and life-long education service consumers' (including mental disability survivors' such as dementia, schizophrenic disorder, developmental disability, victim of child abuse etc.) of quality of life through the use of the community based horticultural activity program. This research baseline problem is about the action-research into Horticultural activity within the field of social-welfare and life-long education service at Minami Kyushu University in Miyazaki Prefecture, Japan. The horticulture and landscape course students are able to complete their graduation theses using horticultural therapy for psychiatric rehabilitation in workplaces for the mental disabled include developmental disability, the elderly nursing home, the daycare center for children, the community center for community based practice, the self -help group for special needs educational support .

The chrysanthemum longicorn beetle, Phytoecia rufiventris, overwinters in the adult stage and reproduces in spring. Larvae of this beetle develop during summer inside a host stem or root. In the present study, photoperiodic control of larval development and its adaptive significance were examined in this beetle using an artificial diet. Larvae showed a short-day photoperiodic response at 25 °C with a critical day length of around 14. h; larvae reared under short-day conditions pupated, whereas those reared under long-day conditions entered summer diapause with some supernumerary molts and did not pupate. A similar response was found at 30 °C, but with a shorter critical day length. Below the critical day length, a shorter day length corresponded to a shorter larval period. Larvae transferred from long-day conditions to various photoperiods showed a similar quantitative response. Field rearing of larvae starting at various times of year showed that pupation occurs within a relatively short period in early autumn. Field rearing of pupae and adults at various times indicated that only pupation in early autumn results in a high survival rate until winter. Earlier or later pupation led to a low survival rate due to death before overwintering in the adult and pupal stages, respectively. Thus, in P. rufiventris, timing of pupation regulated by the quantitative short-day photoperiodic response is vital for survival. Relatively lower developmental threshold in the pupal stage supports this hypothesis. © 2011.

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