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Yasunori Yoshida,Harumi Takahashi,Hiroomi Kanda,Kazunori Okuyama,Kota Sato,Koki Kanahama 한국원예학회 2010 Horticulture, Environment, and Biotechnology Vol.51 No.1
The effects of different gibberellin A3 (GA) concentrations on the development of main shoots and aerial and new tubers in the Japanese yam were examined in an unheated plastic house and open field. In the unheated plastic house, treatment with GA 25 (25 ㎎ · L?¹) or GA 200 (200 ㎎ · L?¹) promoted new tuber growth in the plants by inhibiting aerial tuber growth. Plants treated with GA 100 (100 ㎎ · L?¹) had the greatest fresh weight of new tubers among all GA treated plants. These effective GA concentrations showed similar results in Dioscorea oppositifolia ‘Ichoimo’ and ‘Nagaimo’ that were grown in the unheated plastic house. In the open field, although treatment with GA 25, GA 50 and GA100 promoted new tuber growth by inhibiting aerial tuber growth, the yield of new tubers decreased with increasing GA concentration. Furthermore, although GA inhibited aerial tuber growth, the fresh weight of new tubers after GA 200 treatment was almost equal to that of the GA 0- treated plants. The different effects of GA concentrations under unheated plastic house and open field conditions were due to the negative influence of GA treatment (it decreased the number of leaves on the shoots). In fact, the number of leaves on the shoots of plants grown in the unheated plastic house was significantly lower among GA 25-and GA 200-treated plants than those of GA 0-treated plants. This implies that GA had a negative effect on plants grown in the open field.
Genome Sequence of <i>Striga asiatica</i> Provides Insight into the Evolution of Plant Parasitism
Yoshida, Satoko,Kim, Seungill,Wafula, Eric K.,Tanskanen, Jaakko,Kim, Yong-Min,Honaas, Loren,Yang, Zhenzhen,Spallek, Thomas,Conn, Caitlin E.,Ichihashi, Yasunori,Cheong, Kyeongchae,Cui, Songkui,Der, Jos Elsevier 2019 Current biology Vol.29 No.18
<P><B>Summary</B></P> <P>Parasitic plants in the genus <I>Striga</I>, commonly known as witchweeds, cause major crop losses in sub-Saharan Africa and pose a threat to agriculture worldwide. An understanding of <I>Striga</I> parasite biology, which could lead to agricultural solutions, has been hampered by the lack of genome information. Here, we report the draft genome sequence of <I>Striga asiatica</I> with 34,577 predicted protein-coding genes, which reflects gene family contractions and expansions that are consistent with a three-phase model of parasitic plant genome evolution. <I>Striga</I> seeds germinate in response to host-derived strigolactones (SLs) and then develop a specialized penetration structure, the haustorium, to invade the host root. A family of SL receptors has undergone a striking expansion, suggesting a molecular basis for the evolution of broad host range among <I>Striga</I> spp. We found that genes involved in lateral root development in non-parasitic model species are coordinately induced during haustorium development in <I>Striga</I>, suggesting a pathway that was partly co-opted during the evolution of the haustorium. In addition, we found evidence for horizontal transfer of host genes as well as retrotransposons, indicating gene flow to <I>S. asiatica</I> from hosts. Our results provide valuable insights into the evolution of parasitism and a key resource for the future development of <I>Striga</I> control strategies.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The <I>Striga</I> genome reflects a three-phase model of parasitic plant genome evolution </LI> <LI> A family of strigolactone receptors has undergone a striking expansion in <I>Striga</I> </LI> <LI> Genes in lateral root development are coordinately induced in a parasitic organ </LI> <LI> Host genes and retrotransposons are horizontally transferred into <I>Striga</I> </LI> </UL> </P>
( Yasunori Yamamoto ),( Shinya Furukawa ),( Teruki Miyake ),( Junichi Watanabe ),( Yukihiro Nakamura ),( Yoshihiro Taguchi ),( Tetsuya Yamamoto ),( Aki Kato ),( Katsunori Kusumoto ),( Osamu Yoshida ) 대한소화기기능성질환·운동학회 2024 Journal of Neurogastroenterology and Motility (JNM Vol.30 No.2
Background/Aims Although certain allergic diseases have been reported to be associated with the prevalence of functional dyspepsia (FD) and irritable bowel syndrome (IBS), it is unclear whether the presence of multiple allergic diseases further increases the prevalence of FD and IBS. The aim of this study is to determine this issue in young people. Methods A cohort of 8923 Japanese university students was enrolled and diagnoses of FD and IBS were confirmed using Rome III criteria. Allergic disorders diagnosed at medical institutions were obtained by means of a self-administered questionnaire. Results The prevalence of FD, IBS, and their overlap was found to be 1.9%, 6.5%, and 1.1%, respectively. Pollen allergy was independently positively correlated with FD, IBS, and overlap of FD and IBS. Allergic rhinitis was positively linked to IBS. Drug allergy was positively associated with FD. The presence of multiple allergic diseases was positively correlated with FD and IBS (FD: adjusted OR for 2 allergic diseases: 1.95 [95% CI, 1.24-2.98], P for trend = 0.003; and IBS: adjusted OR for 1 allergic disease: 1.40 [95% CI, 1.15- 1.69], 2 allergic diseases 1.47 [95% CI, 1.12-1.91], and 3 or more allergic diseases: 2.22 [95% CI, 1.45-3.28], P for trend = 0.001). Additionally, the concomitant existence of multiple allergic diseases was also demonstrated to have a trend that correlated with the overlap of FD and IBS (P for trend = 0.018). Conclusion Allergic disease multimorbidity is positively correlated with the prevalence of FD and IBS in a young population. (J Neurogastroenterol Motil 2024;30:229-235)
Bendability of Aluminium- and Steel-Clad Chromium Plates
Okada, Tatsuo,Yoshida, Fusahito,Itoh, Misao,Harada, Yasunori,Ohmori, Masanobu 대한금속재료학회(대한금속학회) 1998 METALS AND MATERIALS International Vol.4 No.3
The present paper describes how the cladding of chromium plate with dissimilar metals improves the plastic bendability of the chromium. Three-point bending tests at various temperatures were performed for three types of chromium specimens: a monolithic chromium plate, aluminium- and steel-clad chromium plate. The aluminium-clad chromium plate was bent at 343 K up to a bent angle of 90 degrees without failure, even when the chromium layer was located outside of the plate (tension side), while the monolithic chromium plate could be bent exclusively at temperatures above 403 K. When the chromium layer was located inside of the steel-clad chromium plate (compression side), the plate was successfully bent at 307 K. The FE stress analysis of bending proved that the cladding of chromium plates with proper metals of different kinds is effective to reduce the tensile stress in chromium induced during bending and also the residual stress existing after bending operation.
An Open Study of Sulforaphane-rich Broccoli Sprout Extract in Patients with Schizophrenia
Akihiro Shiina,Nobuhisa Kanahara,Tsuyoshi Sasaki,Yasunori Oda,Tasuku Hashimoto,Tadashi Hasegawa,Taisuke Yoshida,Masaomi Iyo,갠지하시모토 대한정신약물학회 2015 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.13 No.1
Objective: Schizophrenia is a mental disorder characterized by severe cognitive impairment. Accumulating evidence suggests a role for oxidative stress in the pathophysiology of schizophrenia. Sulforaphane (SFN) extracted from broccoli sprout is an agent with potent anti-oxidant and anti-inflammatory activity. In this study, we attempted to evaluate the effect of SFN on cognitive impairment in medicated patients with schizophrenia. Methods: We recruited a total of 10 outpatients with schizophrenia, all of whom gave informed consent. Participants took 3 tablets of SFN, consisting of 30 mg of SFN-glucosinolate per day, for 8 weeks. Clinical symptoms using the Positive and Negative Syndrome Scale (PANSS) and cognitive function using the Japanese version of CogState battery were evaluated at the beginning of the study and at week 8. Results: A total of 7 patients completed the trial. The mean score in the Accuracy component of the One Card Learning Task increased significantly after the trial. However, we detected no other significant changes in participants. Conclusion: This result suggests that SFN has the potential to improve cognitive function in patients with schizophrenia.