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Taizo Hogetsu
Article type: Article
2010 Volume 64 Issue 2 Pages
57-63
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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Seiya Tsushima
Article type: Article
2010 Volume 64 Issue 2 Pages
64-69
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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Takuro Shinano, Yusuke Unno
Article type: Article
2010 Volume 64 Issue 2 Pages
70-71
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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Satoshi Ishii, Keishi Senoo
Article type: Article
2010 Volume 64 Issue 2 Pages
72-76
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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Yuichi Hongoh
Article type: Article
2010 Volume 64 Issue 2 Pages
77-80
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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Masahiro Kasuya, Hitoshi Honjo, Ryo Fukui
Article type: Article
2010 Volume 64 Issue 2 Pages
81-88
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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The suppressive effects of soils amended with dried crop residues against damping-off of sugar beet and colonization of the pericarp by Rhizoctonia solani and Pythium ultimum were evaluated in a field soil infested with either or both pathogens. Pericarp colonization and damping-off by R. solani were both significantly suppressed when the pasteurized, pathogen-infested soil was amended with dried residue of komatsuna or peanut immediately before sowing and incubated at 22-17 ℃. However, the same soil treatment suppressed neither the saprophytic nor the pathogenic activities of P. ultimum. The same trends were observed when seeded soils were incubated at 32-27 ℃. Likewise, neither plant residue suppressed the disease when incorporated into non-pasteurized infested soil. High incidences of damping-off were also observed in non-infested field soil without residues. In contrast, damping-off was significantly suppressed when the non-pasteurized field soil amended with either residue was incubated at 22-17 ℃ or 32-27 ℃ for 25 days prior to sowing. These results indicated that dried residues of komatsuna and peanut plants could be an agent to induce soil suppressiveness against both pathogens, although induction of disease suppression was observed after a fixed period following post residue amendment in non-pasteurized soil.
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Yuka Miwa, Akihiro Hosomi, Takaaki Ishii
Article type: Article
2010 Volume 64 Issue 2 Pages
89-94
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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'Masui Dauphine' fig (Ficus carica L.) cuttings were grown in pots with various soils for several months. The cuttings were infected with the ceratocystis canker by injection with a suspension of Ceratocystis fimbriata. We studied the shoot growth of the cuttings and nursery mortality against C. fimbriata. A. mixture of a sod-cultured orchard soil and vermiculite (OV) (1:1, v/v) was used in the first experiment. The nursery mortality was 71% in heated OV, 67% in heated OV with excess water, and 67% in heated OV with excess chemical fertilizers. The mortality was lower in heated OV inoculated with arbuscular mycorrhizal fungi (AMF) (26%), heated OV sodded with Vulpia megalura (48%), and non-heated OV (48%) and heated OV inoculated with Trichoderma harzianum RH221 (58%). In the second experiment, a mixture of a forest soil and vermiculite (FV) (1:1, v/v) was used. The nursery mortality was higher in heated FV (68%), but it was lower in heated FV with AMF (16%) and non - heated FV (26%) and heated FV sodded with V. megalura (44%). The least damage to shoot growth was observed in the soils with AMF, in which the lowest mortality was observed in each experiment. These results show that the application of AMF has the potential to control the ceratocystis canker in fig cultures.
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Satoshi Taba, Yoshino Shimabukuro, Atsushi Ajitomi, Zen-ichi Moromizat ...
Article type: Article
2010 Volume 64 Issue 2 Pages
95-100
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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The effects of boiled extracts of Bidens pilosa var. radiata on the control of Meloidogyne incognita and soil microflora in three differing Okinawan soils (Kunigami mahji, Shimajiri mahji and Jyagaru) were evaluated. In all soil types, root-knot formation and the population density of M. incognita were highly suppressed. In addition, the above-ground tissues of tomato plants grown in all three soils treated with a stock solution of B. pilosa extract increased significantly. The plant extracts did not have an appreciable effect on reducing the number of soil microorganisms, including free-living nematodes and did not change the composition of soil microflora. Thus, this study demonstrated that boiled extracts from B. pilosa var. radiata can significantly control nematodes in differing soil types, whereas the effect of the extract on other soil microorganisms is small.
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Minh Thi Nguyen, Kazue Akiyoshi, Masamichi Nakatsukasa, Yuichi Saeki, ...
Article type: Article
2010 Volume 64 Issue 2 Pages
101-106
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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Two soybean (Glycine max (L.) Merr.) cultivars-Sachiyutaka and Kyushu 151-were inoculated with rhizobial mixtures composed of either known USDA strains (U-mix) or representative isolates obtained from field-grown Sachiyutaka (S-mix). This study examined the effects of the host cultivars and inoculum composition on the share of Sinorhizobium (Ensifer) fredii isolates and multiple-occupancy formation. The composition of isolates in the S-mix-infected Sachiyutaka plants, in principle, depended on their relative abundance in the inoculum. Forty-seven to 48% of re-isolated rhizobia were identified as S. fredii. Nearly half of the tested nodules were inhabited by two or more distinct genotypes of rhizobia (multiple occupancy). Cohabitants mostly comprised the Bradyrhizobium japonicum and S. fredii genotypes. When the U-mix was inoculated, B. japonicum USDA 6 preferentially infected both hosts. The frequency of multiple-occupancy nodules was less than that in the case of S-mix inoculation. The two soybean cultivars showed similar results, suggesting that the effect of the plant was minor comparing to that of the inoculum under given conditions. The results suggested that the relative abundance of rhizobial groups determined principally the composition of cohabiters in single nodules under given conditions. In addition, the pairs of B. japonicum and S. fredii developed widely.
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Yuko Matsushita, Sho Morimoto, Chika Bao, Seya Tsushima
Article type: Article
2010 Volume 64 Issue 2 Pages
107-112
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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For denaturing gradient gel electrophoresis (DGGE) analysis, the band distortion has been known to be affected by the unevenness of an electric current and the buffer temperature during DNA loading. However, little is known about the effect of the temperature on the band distortion. The effect of the temperatures of the gel solution (denaturing gel solution temperature: DGT) and glass plates (plate temperature: PT) at the gel-pouring time was examined in the range of 5-28℃ and 10-28℃, respectively. The results showed that the band distortion increased as the difference between DGT and PT increased when the same DNA solutions were loaded in all wells. From these results, the combination of DGT and PT was considered to be a crucial factor for reducing the band distortion. These results and the study of the relationship between the gel polymerization rate and the combination of the two temperatures in an in vitro experiment suggested the heterogeneity of the polymerization rate within a glass plate.
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Kazutoshi Saeki, Masao Sakai, Takashi Kunito
Article type: Article
2010 Volume 64 Issue 2 Pages
113-122
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
123-124
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
125-
Published: October 01, 2010
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
125-127
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
127-128
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
128-129
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
129-130
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
130-131
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
132-133
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
133-135
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
136-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
137-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
137-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
137-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
137-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
138-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
138-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
138-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
138-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
139-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
139-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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Subrata Mowlick, Keisuke Hirota, Toshiaki Takehara, Nobuo Kaku, Atsuko ...
Article type: Article
2010 Volume 64 Issue 2 Pages
139-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
139-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
140-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], Fatma Azwani, [in Japanese], [in Japanese], [in Japanes ...
Article type: Article
2010 Volume 64 Issue 2 Pages
140-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
140-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], The Thiri Maung, [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
141-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
141-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
141-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
141-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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Behnam Nazari, [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
142-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
142-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
142-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
142-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
143-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
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[in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
143-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
143-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Article type: Article
2010 Volume 64 Issue 2 Pages
143-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
144-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2010 Volume 64 Issue 2 Pages
144-
Published: October 01, 2010
Released on J-STAGE: May 31, 2017
JOURNAL
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