The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Yoshihiko Tsumura - One of the best experts on this subject based on the ideXlab platform.
-
Extended Linkage Disequilibrium in Noncoding Regions in a Conifer, Cryptomeria japonica
Genetics, 2011Co-Authors: Etsuko Moritsuka, Yoshihiko Tsumura, Atsushi Watanabe, Yosuke Hisataka, Miho Tamura, Kentaro Uchiyama, Hidenori TachidaAbstract:We measured linkage disequilibrium in mostly noncoding regions of Cryptomeria japonica , a conifer belonging to Cupressaceae. Linkage disequilibrium was extensive and did not decay even at a distance of 100 kb. The average estimate of the population recombination rate per base pair was 1.55 × 10 −5 and was
-
Mating patterns in an indoor miniature Cryptomeria japonica seed orchard as revealed by microsatellite markers
New Forests, 2010Co-Authors: Yoshinari Moriguchi, Hideaki Taira, Yoko Yamazaki, Yoshihiko TsumuraAbstract:To evaluate the practical application of an indoor seed orchard, we compared the seed production, final germination rates and mating patterns of potted Cryptomeria japonica D. Don clones in two miniature seed orchards: one in a glasshouse and the other outdoors. There was no statistically significant difference in total seed production between the orchards ( P = 0.275, ANOVA). However, the final germination rate of seeds produced in the indoor orchard was significantly lower than that of seeds produced in the outdoor orchard ( P
-
variation of paternal contribution in a seed orchard of Cryptomeria japonica determined using microsatellite markers
Canadian Journal of Forest Research, 2004Co-Authors: Yoshinari Moriguchi, Hideaki Taira, Naoki Tani, Yoshihiko TsumuraAbstract:We investigated gene flow and pollen contamination in a seed orchard of Cryptomeria japonica D. Don using six microsatellite markers. The quality of a seed crop is determined by many factors, inclu...
-
Expression analysis of ESTs derived from the inner bark of Cryptomeria japonica
Plant Molecular Biology, 2000Co-Authors: Tokuko Ujino-ihara, Kensuke Yoshimura, Yoshihiro Ugawa, Hiroshi Yoshimaru, Kazutoshi Nagasaka, Yoshihiko TsumuraAbstract:To assist genetic research into Cryptomeria japonica , which is one of the most important forest tree species in Japan, expressed sequence tag (EST) analysis was carried out. The cDNA clones were isolated from a library derived from inner bark tissues. Partial sequences were obtained from 2231 clones, representing 1398 unique transcripts. Putative functions were assigned to 1583 clones, which represented 882 unique transcripts, by a Blast algorithm. Homology analysis suggested that ESTs related to cell wall formation represented about 3% of the clones. Transcripts of plant stress response genes were also abundant in the inner bark library, especially genes involved in wounding and drought responses. This indicates that the stress response systems of this tree species are similar to those of other plants, and that these systems are highly conserved among plant species. The remaining 648 clones, which represented 516 unique transcripts, did not show any significant homology to known sequences in the databases searched: these are expected to represent genes specific to Cryptomeria and, possibly, to related species.
-
Regeneration system and genetic diversity of Cryptomeria japonica growing at different altitudes
Canadian Journal of Forest Research, 1997Co-Authors: H Taira, Yoshihiko Tsumura, Y Tomaru, K OhbaAbstract:Le mode de regeneration et la diversite genetique des forets de Cryptomeria qui croissent entre 900 et 2050 m d'altitude furent etudies au moyen de l'analyse isoenzymatique. Au-dessus de 1750 m d'altitude, Cryptomeria se regenere seulement par marcottage et la plupart des arbres sont relies les uns aux autres par les racines. Il y a peu de diversite genetique dans les forets au-dessus de 1750 m d'altitude. Par consequent, des forets entieres croissant au-dessus de 1750 m d'altitude sont considerees comme un seul clone. Au-dessous de 1550 m, Cryptomeria se regenere par semis et marcottage et il y a beaucoup de diversite genetique. Comme on peut le constater, Cryptomeria change son mode de regeneration pour s'adapter aux conditions climatiques locales. Sous des climats severes, Cryptomeria se regenere seulement par marcottage et perd sa diversite genetique. Cependant, lorsque les conditions climatiques deviennent plus clementes, Cryptomeria se regenere par marcottage mais egalement par semis et conserve sa diversite genetique.
Kenji Shinohara - One of the best experts on this subject based on the ideXlab platform.
-
Characterization of Genes for a Pollen Allergen, Cry j 2, of Cryptomeria japonica
International Archives of Allergy and Immunology, 2006Co-Authors: Norihiro Futamura, Y. Kusunoki, Y. Mukai, Kenji ShinoharaAbstract:Background: Cry j 2 is one of the major pollen allergens of Cryptomeria japonica. The polymorphism of Cry j 2 isoforms and the conservation of the structure of Cr
-
phytosulfokine stimulates somatic embryogenesis in Cryptomeria japonica
Plant and Cell Physiology, 2003Co-Authors: Tomohiro Igasaki, Noriko Akashi, Tokuko Ujinoihara, Yoshikatsu Matsubayashi, Youji Sakagami, Kenji ShinoharaAbstract:;Phytosulfokine (PSK), which has been identified as a plant growth factor, had a dramatic stimulatory effect on the formation of somatic embryos of sugi (Cryptomeria japonica) in the presence of polyethylene glycol. The resultant somatic embryos germinated with synchronous sprouting of cotyledons, hypocotyls and roots, and most of the seedlings grew normally. A cDNA clone for the precursor to the PSK peptide of C. japonica was identified in an expressed sequence tags database. Our results support the existence of a PSK signaling pathway in C. japonica.
Kozue Sotome - One of the best experts on this subject based on the ideXlab platform.
-
taxonomy and phylogenetic position of fomitiporia torreyae a causal agent of trunk rot on sanbu sugi a cultivar of japanese cedar Cryptomeria japonica in japan
Mycologia, 2014Co-Authors: Tsutomu Hattori, Hitoshi Nakamura, Yoshie Terashima, Yurika Miyuki, Kozue SotomeAbstract:Trunk rot poses a substantial threat to Sanbu-sugi, one of the most economically important cultivars of Japanese cedar (Cryptomeria japonica). The etiology of this disease, including its main agent...
Tsutomu Hattori - One of the best experts on this subject based on the ideXlab platform.
-
taxonomy and phylogenetic position of fomitiporia torreyae a causal agent of trunk rot on sanbu sugi a cultivar of japanese cedar Cryptomeria japonica in japan
Mycologia, 2014Co-Authors: Tsutomu Hattori, Hitoshi Nakamura, Yoshie Terashima, Yurika Miyuki, Kozue SotomeAbstract:Trunk rot poses a substantial threat to Sanbu-sugi, one of the most economically important cultivars of Japanese cedar (Cryptomeria japonica). The etiology of this disease, including its main agent...
Cheng-chi Chen - One of the best experts on this subject based on the ideXlab platform.
-
Two New Abietane-type Diterpenes from the Bark of Cryptomeria japonica:
Natural Product Communications, 2020Co-Authors: Chi-i Chang, Chien-chih Chen, Che-yi Chao, Horng-huey Ko, Hsun-shuo Chang, Sheng-yang Wang, Jih-jung Chen, Cheng-chi ChenAbstract:Phytochemical investigation of the methanol extract of the bark of Cryptomeria japonica has led to the isolation of two new abietane-type diterpenoids, 7a-(2’-butoxyethoxy)deoxocryptojaponol (1) an...
-
New Abietane-type Diterpenoids from the Bark of Cryptomeria japonica
Natural Product Communications, 2020Co-Authors: Chi-i Chang, Sheng-yang Wang, Cheng-chi Chen, Jih-jung Cheng, Wei-yi Cheng, Ming-jen ChengAbstract:Two new abietane-type diterpenoids, 15-hydroxy-12-O-methylsugiol (1) and 2a-hydroxy-12-O-methylsugiol (2) were isolated from the methanol extract of the bark of Cryptomeria japonica. Their structur...
-
Two new sesquarterpenoids from the bark of Cryptomeria japonica
Phytochemistry Letters, 2017Co-Authors: Chi-i Chang, Horng-huey Ko, Hsun-shuo Chang, Sheng-yang Wang, Jih-jung Chen, Ming-jen Cheng, Ming-der Wu, Cheng-chi ChenAbstract:Abstract Two new sesquarterpenoids, i.e. ferrugicadinol A (1) and ferrugicryptomeridiol (3), and one known sesquarterpenoid, ferrugicadinol (2) were isolated from the bark of Cryptomeria japonica D. Don. Their structures were identified by extensive spectral analysis and comparison with the data of known analogues.
-
cytotoxic c35 terpenoid cryptotrione from the bark of Cryptomeria japonica
Organic Letters, 2010Co-Authors: Cheng-chi Chen, Jyhhorng Wu, Ningsun Yang, Jang Yang Chang, Sheng-yang WangAbstract:A novel C35-terpene, designated as cryptotrione (1), with an unprecedented skeleton possessing an abietane diterpene with a unique bicyclic sesquiterpene, is identified from the bark of Cryptomeria japonica. The carbon skeleton of 1 represents a new structural entity, and this is an intriguing addition to the structurally diverse diterpene-sesquiterpene class. A unique biosynthetic pathway is proposed to support the production of this phytocompound. Notably, 1 exhibits anticancer activity with an IC50 value of 6.44 ± 2.23 μM.