Biosystematic Studies on the Genus Hemerocallis (Liliaceae) : II. Variation in Gross Morphology of the H. fulva Complex with Special Reference to the Identity of H. fulva v. longituba and v. disticha

Hemerocallis fulva sensu lato is known to be an exceedingly polymorphic species. In a recent taxonomic revision of the genus Hemerocallis in Japan and its neighbouring regions, Matsuoka and Hotta (1966) distinguished primarily by gross morphology, the following seven infraspecific taxa in the H. fulva complex: H. fulva L. v. fulva : v. Kwanso Regel ; v. sempervirP-ns (Araki) H. Hotta : v. littorea (Makino) M. Hotta ; v. longituba (Miq.) Maxim. ; v. disticha (Donn) M. Hotta ; and v. paucijlora M. Hotta & Matsuoka. However, there are still considerable discre· pancies in the taxonomic concept and treatment of this complex group. It has not been resolved, for example, whether or not several native Japanese taxa now referred to the H. fulva complex, such as v. disticha, v. longituba, etc. in the sense of Matsuoka and Hotta (1. c. ) should be referred to the same taxonomic group as the continental taxon, H. fulva v. fulva. This latter group also includes the double-flowered taxon, v. Kwanso which is widely distributed over the Japanese Islands excepting northern Hokkaido (cf. Ohwi, 1953, 1965; Kitamura et al., 1967).This paper particularly attempts to draw attention to the taxonomical identity of two native Japanese taxa, H. fulva v. longituba and v. disticha. In the present study; the variabilities of the plants, referred to the following four taxa of this complex, i. e., v. fulva, v. Kwanso, v. disticha, and v. longituba, are analyzed and compared, and their taxonomic status briefly discussed

Biosystematic Studies on the genus Hemerocallis (Liliaceae) : I. Introgressive Hybridization between H. citrina v. vespertina and H. fulva sensu lato

The occurrence of a natural hybrid swarm between Hemerocallis citrina v. vespertina (Hara) M. Hotta and two varieties of H. fulva, i. e. , v. longituba (Miq.) Maxim. and v. disticha (Donn) M. Hotta, was first reported by Nakao and Yamashita (1956) from Matsunoki, located at the distance of 4 km east of Takayama City, Gifu Prefecture, Central Honshu.Based on the results of their investigation, it was concluded that this particular hybrid swarm found in a valley near Takayama represents an initial stage of introgression of genes of H. citrina v. vespertina into the population of H. fulva (Nakao and Yamashita, l. c. ) . Another example of introgressive hybridization in Hemerocallis, i. e., between H. middendorffii and H. yezoensis was reported by Kawano (1961) from Otanoshike near Kushiro City in Hokkaido. In both cases, the ecological disturbance of the habitats was deemed to be the maj or causes in breaking down the isolation barrier previously existing between these plants.In the present study, a natural hybrid population of Hemerocallis in the Matsunoki district was re-investigated from several new standpoints in order to know more precisely about the biological status of this particular population. In addition to the analyses of gross morphology and ecology, the karyotypes and meiotic behaviours of the chromosomes were studied. The pollen fertility, the setting rate and germination rate of the seeds were also examined. Furthermore, the electrophoretic banding patterns of acid-soluble protein extracted from the rhizomes of both parental and hybrid plants were likewise analyzed and compared with one another

Effects of air pollution on vegetation in rural areas of Central Honshu, Japan -A record of monitoring study over past 30 years-

京都大学富山医科薬科大学Proceeding : International Symposium of Kanazawa University 21st-Century COE Program Vol.2(2004),Schedule: February 29(SUN)-March 3(WED), Venue: 29 FEB, Ishikawa Life-Long Learning Center(Former Prefectural Government Building) / 1-3 MAR Kanazawa Art Hall, Organized by: Kanazawa University 21st-Century COE Program / Ishikawa International Cooperation Research Centre / United Nations University-Institute of Advanced Studies, Supported by: Ishikawa Prefectural Government / City of Kanazawa, Eds : Hayakawa, Kazuichi / Kizu, Ryoichi / Kamata, Naok

Efficacy and safety of endoscopic submucosal dissection for gastric tube cancer: A multicenter retrospective study

BACKGROUND Recent improvements in the prognosis of patients with esophageal cancer have led to the increased occurrence of gastric tube cancer (GTC) in the reconstructed gastric tube. However, there are few reports on the treatment results of endoscopic submucosal dissection (ESD) for GTC. AIM To evaluate the efficacy and safety of ESD for GTC after esophagectomy in a multicenter trial. METHODS We retrospectively investigated 48 GTC lesions in 38 consecutive patients with GTC in the reconstructed gastric tube after esophagectomy who had undergone ESD between January 2005 and December 2019 at 8 institutions participating in the Okayama Gut Study group. The clinical indications of ESD for early gastric cancer were similarly applied for GTC after esophagectomy. ESD specimens were evaluated in 2-mm slices according to the Japanese Classification of Gastric Carcinoma with curability assessments divided into curative and non-curative resection based on the Gastric Cancer Treatment Guidelines. Patient characteristics, treatment results, clinical course, and treatment outcomes were analyzed. RESULTS The median age of patients was 71.5 years (range, 57-84years), and there were 34 men and 4 women. The median observation period after ESD was 884 d (range, 8-4040 d). The median procedure time was 81 min (range, 29-334 min), the en bloc resection rate was 91.7% (44/48), and the curative resection rate was 79% (38/48). Complications during ESD were seen in 4% (2/48) of case, and those after ESD were seen in 10% (5/48) of case. The survival rate at 5 years was 59.5%. During the observation period after ESD, 10 patients died of other diseases. Although there were differences in the procedure time between institutions, a multivariate analysis showed that tumor size was the only factor associated with prolonged procedure time. CONCLUSION ESD for GTC after esophagectomy was shown to be safe and effective

タネツケバナ属の新帰化植物 Cardamine hirsuta L.ミチタネツケバナ

[論文] Articl

カワラヨモギとオトコヨモギ(キク科)の自然雑種集団とその生物学的位置

[論文] Articl

Difficult Stones in the Common Bile Duct Successfully Treated by Electrohydraulic Lithotripsy using a Double Lumen Balloon Catheter and Rotating Hemostatic Valve under 180 Degree Revolving X-ray System.

The effectiveness of electrohydraulic lithotripsy (EHL) for stones in the common bile duct (CBD) is well established. It is recommended that the procedure is performed under cholangioscopic control for correct positioning of the probe onto the surface of the stones and prevention of complications arising from contact between the tip of the probe and biliary mucosa. However problems are encountered if insertion of the babyscope into the bile duct is not successful particularly in the presence of duct stenosis or technical difficulties, or when the mother-baby system can not be prepared. For the latter reason, large difficult stones in the CBD were treated by EHL using a double lumen balloon catheter and rotating hemostatic valve (EHLB) under 180 degree revolving X-ray system. The tip of the EHL probe was placed at 2-3 mm out of the balloon catheter, which was used to avoid contact between the tip of the probe and mucosa of the CBD under fluoroscopic control. Rotating hemostatic valve was used to allow examination of the effect of EHL without changing the catheter or pulling out the probe during operation. After endoscopic sphincterotomy, the device was delivered close to the surface of the stone under fluoroscopic guidance. After inflation of the balloon, we confirmed that the tip of the device was set at almost the center of the CBD by 180 degree revolving X-ray system. Partial fragmentation and complete removal of the stones was achieved by combined treatment including EHLB, basket or balloon catheter for stone extraction. There were no serious procedure-related complications