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MITSUHIRO MATSUO HIDEKI MICHINAGA HIROYUKI TERAO EIJI TSUZUKI 《Weed Biology and Management》2004,4(3):148-153
Seed germination, seedling emergence, and the morphological characteristics of juvenile seedlings of Commelina benghalensis L. were observed. For aerial seeds collected in September and October, seedling emergence peaked in April and June for large seeds and from June to August for small seeds, whereas seedling emergence for large seeds collected in November showed peaks in March and April under natural rainfall conditions, and in April and June under irrigation conditions. Seedlings from small seeds emerged intermittently over a longer period from April to August under both conditions. Aerial seeds of C. benghalensis germinated on wet filter paper on the second day after seeding (DAS) for large seeds and the fourth DAS for small seeds. The germination percentage for large seeds was higher than that for small seeds by the 14th DAS. The germination percentage for large aerial seeds showed no significant difference between light and dark conditions. However, the percentage for small aerial seeds was higher under light than under dark conditions. Seedlings from large aerial seeds emerged on the third DAS at 0–50 mm soil depths. The percentage of emergence at 0 and 1 mm soil depths increased until the 30th DAS, whereas those at soil depths of 5–50 mm showed no change after the 9th DAS. There was no emergence at a soil depth of 100 mm. Seedlings from small aerial seeds emerged on the 6th DAS at 0–1 mm soil depths, with the percentage increasing until the 30th DAS. Although seedlings at 5 and 10 mm soil depths also emerged on the 6th DAS, there was no change in the percentage after the 12th DAS. There was no emergence at soil depths of 20–100 mm. The hypocotyl and taenia (part of the cotyledon connected to the seed) in juvenile seedlings that emerged from soil depths of 50 mm were longer than those in seedlings emerging from a soil depth of 1 mm. 相似文献
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Masanori KOBAYASHI Chie TSUZUKI Marika KOBAYASHI Hinano TSUCHIYA Yume YAMASHITA Kanako UENO Moe ONOZAWA Masato KOBAYASHI Eiichi KAWAKAMI Tatsuya HORI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(7):1044
Oxidative stress owing to an imbalance between reactive oxygen species and antioxidants, such as coenzyme Q10 (CoQ10), is a major contributor to male infertility. We investigated the effects of the reduced form of CoQ10 (ubiquinol) supplementation on semen quality in dogs with poor semen quality. Three dogs received 100 mg of ubiquinol orally once daily for 12 weeks. Semen quality, serum testosterone, and seminal plasma superoxide dismutase (SOD) activity were examined at 2-week intervals from 2 weeks before ubiquinol supplementation to 4 weeks after the treatment. Ubiquinol improved sperm motility, reduced morphologically abnormal sperm, and increased seminal plasma SOD activity; however, it had no effect on testosterone level, semen volume, and sperm number. Ubiquinol supplementation could be used as a non-endocrine therapy for infertile dogs. 相似文献
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Sang-gun ROH Yeon-hee HONG Daisuke HISHIKAWA Hiroaki TSUZUKI Hisae MIYAHARA Yukihiko NISHIMURA Chizu GOTO Yasuki SUZUKI Ki-choon CHOI Hong-gu LEE Shinichi SASAKI 《Animal Science Journal》2005,76(4):381-386
Ghrelin and growth hormone secretagogues receptor (GHS‐R or ghrelin receptor) have been reported as being one of the factors of adipogenesis in adipocytes. To investigate the involvement of ghrelin and GHS‐R in adipocytes, the effect of the GHS‐R antagonist, [D‐Lys‐3]‐GHRP‐6 (His‐D‐Trp‐D‐Lys‐Trp‐D‐Phe‐Lys‐NH2), on the process of adipogenesis in ovine and rat adipocytes was evaluated. [D‐Lys‐3]‐GHRP‐6 (10?7 mol/L) significantly inhibited adipogenic differentiation of ovine and rat preadipocytes prepared from adipose tissues. The level of peroxisome proliferator activated receptor (PPAR)‐γ2 mRNA, an adipogenic marker, was decreased during the differentiation of adipocytes treated with [D‐Lys‐3]‐GHRP‐6 for 10 days. Ghrelin stimulated adipogenesis, also causing an increment of glycerol‐3‐phosphate dehydrogenase and upregulation of PPAR‐γ2. Furthermore, the antilipolytic effect of ghrelin was attenuated by treatment with [D‐Lys‐3]‐GHRP‐6 in both types of isolated adipocytes. Overall, the results of the present study highlight that GHS‐R in adipogenesis can be blocked by treatment with [D‐Lys‐3]‐GHRP‐6. 相似文献
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Nao TSUZUKI Yoshiro ENDO Lisa KIKKAWA Kenji KOROSUE Yasuyuki KANEKO Akira KITAUCHI Hiromu KATAMOTO Yuichi HIDAKA Mitsuyoshi HAGIO Shidow TORISU 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(12):1647-1650
The performance of horses undergoing regular intense exercise is adversely affected by
oxidative stress. Thus, it is important to increase antioxidant production in horses in
order to reduce oxidative stress. Ozonated autohemotherapy (OAHT) reportedly promotes
antioxidant production. This study aimed to evaluate the effects of OAHT on antioxidant
capacity. Ten Thoroughbred horses were used in this study. After the OAHT, we collected
serum samples and measured biological antioxidant potential (BAP). We found that BAP began
to increase after the OAHT and was significantly higher in the OAHT group than at 3
(P<0.01) and 7 days (P<0.05) after OAHT than in
the control group at 3 and 7 days after starting collection of blood samples. Therefore,
it was shown that OAHT improved the antioxidant capacity of the horses. 相似文献
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Naoki SASAKI Nao TSUZUKI Michiaki YAMADA Takuto MINAMI Haruo YAMADA 《Journal of Equine Science》2009,20(1):7-10
This study aimed to establish a standard dose and sample collection time for
13C phenylalanine and 13C-Dipeptide breath test in horses. To
evaluate dose-dependent effects, healthy horses received 2.5 mg/kg, 5 mg/kg, and 10 mg/kg
13C phenylalanine dissolved in 1 ml/kg distilled water and 1.25 mg/kg, 2.5
mg/kg, and 5 mg/kg 13C dipeptide dissolved in 2 ml/ kg distilled water. Tmax
was observed during the sample collection time. For 13C phenylalanine, the
standard deviation of Cmax at 5 mg/kg was lower than that of 10 mg/kg. For 13C
dipeptide, the standard deviation of Tmax was the lowest at 5 mg/kg. This study revealed
that an optimal dose for breath tests with 13C phenylalanine and 13C
dipeptide may be 5 mg/kg in horses. 相似文献
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Hayato AMAIKE Motoki SASAKI Nao TSUZUKI Mitsunori KAYANO Motoharu OISHI Kazutaka YAMADA Hideki ENDO Tomoko ANEZAKI Naoya MATSUMOTO Rumiko NAKASHITA Misako KUROE Hajime TARU Gen BANDO Yuko IKETANI Ryohei NAKAMURA Nobutaka SATO Daisuke FUKUI Nobuo KITAMURA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(8):1284
In several primates and carnivores, pronation/supination angles of the forearm skeleton were examined, and it is thought that a larger angle is useful to acquire dexterous behaviors in feeding and/or life style, including climbing. In this study, the pronation/supination angles in Asiatic black, brown and polar bears were nondestructively examined. These specimens were classified as adult or non-adult. Three or four carcasses of each group of Asiatic black and brown bears were used for CT analysis, whereas only one adult polar bear was used. The forearms were positioned within the gantry of a CT scanner in both maximally supinated and pronated states. Extracted cross-sectional CT images of two positions were superimposed by overlapping the outlines of each ulna. The centroids of the radii were detected, and then the centroid of each radius and the midpoint of a line which connects between both ends of the surface of each radius facing the ulna, were connected by lines to measure the angle of rotation as an index of pronation/supination. In adult brown and polar bears, the angles were smaller as compared with the other groups (Asiatic black and non-adult brown bears). Asiatic black and non-adult brown bears can climb trees, whereas adult brown bears and polar bears cannot. This suggests that the pronation/supination angle is related to arboreal activity in Ursidae. 相似文献
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TRAN DANG XUAN EIJI TSUZUKI HIROYUKI TERAO MITSUHIRO MATSUO TRAN DANG KHANH SEIICHI MURAYAMA NGUYEN HUU HONG 《Weed Biology and Management》2003,3(2):137-144
Two alfalfa varieties, namely Rasen and Yuba , and rice by-products of Koshihikari ( Oryza sativa L. cv. Japonica ), including hull and bran were used for weed control in rice. Rasen and Yuba were sequentially evaluated to have the strongest allelopathic potential among eight common alfalfa varieties in Japan. Rasen , Yuba and rice by-products in a laboratory experiment exhibited suppression of emergence of lettuce ( Lactuca sativa L.), barnyardgrass ( Echinochloa oryzicola Vasing.), and monochoria ( Monochoria vaginalis Presl var. plantaginea Solms-Laub.). In a paddy field experiment, at 15 days after application, a dose of 1 ton ha−1 of alfalfa, rice by-products and the incorporated alfalfa-rice by-products significantly inhibited weed growth and reduced weed species, except for rice bran. However, at 40 days after application, the greatest weed control was sequentially recorded with Yuba (95.2%), Rasen (90.5%) and the incorporated Rasen -hull (88.3%). Rice hull exhibited stronger (51.7%) weed control than the negligible weed control of rice bran (25.1%). Inhibition of both Rasen and Yuba on weed emergence after application became more vigorous, whereas those of rice by-products were gradually devitalized. Rasen had a maximum increase of rice yield (80.6%) compared to the control and it was slightly higher (9.6%) than the herbicide treatment. Findings showed that Rasen was the most promising material for weed control among those studied. Results denoted that weed control capability of allelopathic materials had an impetuous effect on rice growth and yield. 相似文献
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NGUYEN HUU HONG TRAN DANG XUAN TSUZUKI EIJI MITSUHIRO MATSUO OGUSHI YUICHI 《Weed Biology and Management》2002,2(3):143-147
Kava is a perennial pepper plant from the Oceanic region, which is commonly used as a drink by natives and for pharmacological purposes. Results of this study concluded that Kava has allelopathic potential and suppressed germination and growth of lettuce ( Lactuca sativa L), barnyardgrass ( E. crus-galli Beauv var. formosensis Ohwi.), and duck-tongue weed ( M. vaginalis Presl var. plantaginea Solms-Laub.) Moreover, Kava inhibited emergence of weeds in paddy soils. The inhibition of Kava became stronger as the applied concentration increased. In a greenhouse experiment, Kava had the greatest inhibition on emergence and weed growth in paddy soils when a dose of 1 ton ha−1 of Kava was divided and applied at 3, 16, and 23 days after watering. Inhibition by Kava varied among weed species. Results from this study suggest that Kava might be useful for weed control in rice or reduce dependence on herbicide. 相似文献