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TOSHIO ANDO, SHINICHI IIDA, HISASHI KOKUBUN, YOSHIHIRO UEDA, EDUARDO M ...
Article type: Article
1995 Volume 45 Issue 2 Pages
95-109
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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A survey of native habitats of Petunia species over 5 seasons revealed the cooccurrence of two subspecies of P. axillaris sensu lato in Uruguay. Typical subsp. axillaris and subsp. parodii were found in south eastern and north western departments, respectively. Using floral measurements (length of corolla tube, corolla limb, pedicel, and calyx lobes, and the length of corolla tube / length of corolla limb ratio) of specimens collected in these departments, we performed stepwise discriminant analyses. After substituting measurements of 174 specimens collected in the whole of Uruguay into the three discriminant functions thus obtained, we determined them to be either subsp. axillaris or subsp. parodii. Distribution of the two subspecies thus determined by the discriminant functions was roughly delimited by the Rio Negro. A considerable number of doubtful specimens were found in the south western departments, which are on opposite sides of the river de La Plata from the place where secondary intergradation between the two subspecies had been suggested by Wijsman (1982) to have occurred.
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HIDEKI TAKAHASHI, TOSHIYAKI SATO, NIKITA G. SOLOMONOV, BORIS I. IVANOV
Article type: Article
1995 Volume 45 Issue 2 Pages
111-118
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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In 1992-1993,botanical surveys of Yakutia in eastern Siberia were carried out. Aquatic plants were collected and new phytogeographic information was added. Utricularia macrorhiza Le Conte was collected from four sites in Yakutia, suggesting that this species is more widely distributed in northeastern Asia. Sparganium natans L. was recorded from eastern Siberia. This evidence fills up the gap in its circumpolar distribution. The present collection of Spirodela polyrhiza (L.) Schleid. is the second formal record from Yakutia, probably the northern limit of this species in Asia.
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TAKASHI SUGAWARA, SHINOBU AKIYAMA, JIN MURATA, YONG-PING YANG
Article type: Article
1995 Volume 45 Issue 2 Pages
119-125
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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Ten species of Impatiens collected from southwest Yunnan were examined karyologically. Eight of them were analyzed for the first time. As a result, five different chromosome numbers were counted : 2n=12 in I. aureliana; 2n=16 in I. begoniifolia, I. mengtszeana, I. yingjiangensis; 2n=17 in I. mengtszeana; 2n=18 in I. racemosa, I. ruiliensis, I. siculifera, I. tongbiguanensis, I. uliginosa; 2n=20 in I. rubrostriata. No significant difference in karyotype was found among species with the same chromosome number. The karyotypes of species with 2n=12,2n=17,2n=18,and 2n=20 are bimodal, while those with 2n=16 are monomodal. On the basis of these karyological characteristics, relationships of these Chinese species to other species occurring in adjacent regions are discussed.
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KWEON HEO, KAZUO OGINUMA
Article type: Article
1995 Volume 45 Issue 2 Pages
127-130
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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The chromosome number and morphology of Eusideroxylon zwageri, the only species of the genus, was investigated for the first time. Results showed that, although Eusideroxylon is similar to other Lauraceae in karyotype at metaphase as well as in chromosome features at interphase and prophase, the genus is distinct in the family (with x=12) in having 2n=30. Its unique chromosome number, along with its several distinctive floral features such as tepaloid outer staminodial whorls and semi-inferior ovary, suggests that Eusideroxylon is one of the most derived genera in the family.
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HIDETAKA UMATA, SEIICHI KANETANI, TAKESHI MORI
Article type: Article
1995 Volume 45 Issue 2 Pages
131-138
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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An intensive survey of the habitat and habit of Erythrorchis altissima (Bl.) Bl., a chlorophyll-free twining orchid from Kutinoerabujima and Tokunoshima islands, at the southernmost part of the Japanese Archipelago, and at the northernmost end of the range of the orchid, showed that (1) the species inhabits forests dominated by Castanopsis sieboldii, (2) the terrestrial stems climb almost exclusively on trunks of C. sieboldii, especially on trunks of dead trees, (3) the species frequently occurrs on "hodagi" made of C. sieboldii, the bed logs (1-1.5m long) for the cultivation of "Shiitake" mushrooms, Lentinus edodes (this suggests that "hodagi" provides a source of the symbiotic mycorrhizal fungi for the orchid), (4) the average length of terrestrial stems in plants bearing flowers was 3.5m, ca. 2m longer than sterile stems (this suggests that the terrestrial stems require a considerable time to grow before flowering) and (5) the species flowers from May to June and fruits mature in November.
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KEIKO KOSUGE, KYOKO DOI(WATANABE), MICHIO TAMURA
Article type: Article
1995 Volume 45 Issue 2 Pages
139-150
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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Glaucidium, a monotypic genus indigenous to Japan, has been considered to be related to Paeonia, Hydrastis, Podophyllum or members of the Hypericales. Immunological analysis of seed protein was employed to illuminate the phylogenetic relationships of Glaucidium. Antisera against 11S-globulin small polypeptides were prepared from seed extracts of Glaucidium palmatum, Aquilegia buergeriana and Chelidonium japonicum, and the immunoreactivity was detected by the Western blotting method. The immunological affinity indicates that Glaucidium is more closely related to the Ranunculaceae than to Paeonia or the Hypericales.
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TOMOHIKO TSUGE, HIROKAZU TSUKAYA
Article type: Article
1995 Volume 45 Issue 2 Pages
151-164
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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Analysis of leaf morphogenesis has long been an interest for botanists. The leaf is a fundamental unit composing the metameric structure derived from the shoot apical meristem. Understanding leaf morphogenesis will help the comprehension of the overall plant morphogenesis. Also, from the point of view of plant systematics, it is worthwhile to understand the genetic backgrounds that induce the morphological differences in plants under various environmental conditions. Leaf development in dicotyledons is a complicated system which involves cell division and elongation, throughout the entire leaf. However, by using mutations in genes controlling leaf development, individual developmental pathways essential for leaf morphogenesis can be separately identified. This will provide an easy system for analysis. Recently, Arabidopsis thaliana (L.) Heynh. has been used as a model plant for morphogenetic analysis in dicotyledons. In fact, it has been successfully used in the analysis of floral development. We have isolated mutants which seem to have defect in the ontogenic process of leaf development. So far, we have unveiled the existence of genes regulating nonpolar expansion and polar elongation of the cells in the leaf, which affect its morphology. As a result, the length and width of the leaf were found to be independently regulated by these genes. Other mutants assume the possibility of different regulations in the leaf development, analysis of which is now in progress. Here we briefly review the current understanding on the leaf development. New morphogenetic analyses of leaf development in a model plant Arabidopsis are also presented.
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N. MORIMOTO
Article type: Article
1995 Volume 45 Issue 2 Pages
165-169
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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H. NAKANISHI, Y. KAWACHINO
Article type: Article
1995 Volume 45 Issue 2 Pages
169-171
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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G. MURATA
Article type: Article
1995 Volume 45 Issue 2 Pages
171-172
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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G MURATA
Article type: Article
1995 Volume 45 Issue 2 Pages
172-
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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[in Japanese]
Article type: Article
1995 Volume 45 Issue 2 Pages
173-
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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[in Japanese]
Article type: Article
1995 Volume 45 Issue 2 Pages
174-
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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[in Japanese]
Article type: Article
1995 Volume 45 Issue 2 Pages
175-
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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[in Japanese]
Article type: Article
1995 Volume 45 Issue 2 Pages
176-
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
JOURNAL
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[in Japanese]
Article type: Article
1995 Volume 45 Issue 2 Pages
176-
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
JOURNAL
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[in Japanese]
Article type: Article
1995 Volume 45 Issue 2 Pages
177-179
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
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[in Japanese]
Article type: Article
1995 Volume 45 Issue 2 Pages
180-
Published: April 28, 1995
Released on J-STAGE: September 25, 2017
JOURNAL
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