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Volume 56 (1990)
- Issue 5 Pages 569-
- Issue 4 Pages 443-
- Issue 3 Pages 283-
- Issue 2 Pages 177-
- Issue 1 Pages 1-
Volume 56, Issue 3
Displaying 1-18 of 18 articles from this issue
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Recent Advancement and Its Future ProspectSatoshi WAKIMOTO1990 Volume 56 Issue 3 Pages 283-286
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Hiroyuki HIBINO1990 Volume 56 Issue 3 Pages 287-289
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Chuji HIRUKI1990 Volume 56 Issue 3 Pages 290-293
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Haruo YANASE1990 Volume 56 Issue 3 Pages 294-296
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Yasuo ANDO1990 Volume 56 Issue 3 Pages 297
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Hideki HARA1990 Volume 56 Issue 3 Pages 298
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Takeshi KANO1990 Volume 56 Issue 3 Pages 299
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Tomizo OHGUCHI, Yasuji ASADA1990 Volume 56 Issue 3 Pages 300-308
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
JOURNAL FREE ACCESSMorphological studies on Peronospora parasitica Pers. ex Fr. was carried out in order to understand its behavior in tissues of Japanese radish. Fungal growth in leaf, petiole, hypocotyl and root of a susceptible cultivar, Shirokubi-miyashige and a resistant cultivar, Heian-tokinashi was investigated. In leaf, the hypha turned and twisted irregularly in the intercellular spaces of spongy parenchyma, and usually formed one haustorium in one host cell. However in root tissue where the parenchyma cells were large and much closer together, the hypha was smooth and formed one to several haustoria in one host cell. Hyphal growth pattern in petiole and hypocotyl was similar to that in root tissue. Fungal growth rate in root slices of resistant and susceptible cultivar was already significantly different on the 3rd day after inoculation, while the shape of its intercellular hypha and haustorium was almost the same. Prior to haustorium formation, a hitherto undescribed structure, leaf-like structure (LL structure), was formed from the intercellular hypha in narrow space between root parenchyma cells. It is flat in shape of ca. 6μm in thickness, covering the surface of host cell. Size of the LL structure was proportional to that of host cells. The LL structure formed various type of haustoria, ranging 0 to 25 numbers in one cell. The number of the LL structures depended on the hyphal density in the tissue.View full abstractDownload PDF (4722K) -
Jiro TOGASHI1990 Volume 56 Issue 3 Pages 309-314
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
JOURNAL FREE ACCESSEight hundred and thirty-nine isolates of soft rot bacteria were collected from 17 kinds of diseased vegetables in the Tsuruoka District, Yamagata Prefecture, Japan, in 1984-1986. Their sensitivity to 10 phage isolates tentatively named as a to j was then tested by means of the drop method. The phages, which were collected from soft rot lesions of the plants in the same district in 1984, were different each other in the host range. The phage-sensitive isolates of the bacteria were classified into 10 groups tentatively named as A to J according to the bases of susceptibility to the phages. Some of the bacterial isolates showed a different reaction to the phages from that of the isolates belonging to groups A to J. In 1984, 60 (22.0%) out of 272 isolates were sensitive to the phages and 43 of them belonged to these 10 groups (A-J). In 1985, 119 (43.1%) out of 276 isolates were sensitive to some phages and 113 of them belonged to 5 groups. And in 1986, 112 (38.4%) out of 291 isolates were sensitive to some phages and 106 of them belonged to 7 groups. Though there was no predominant group in 1984, the isolates belonging to group G occurred predominantly in 1985 and 1986. They accounted for 84.1% and 74.1% of the phage-sensitive isolates, respectively. Also, there was no definite correlation between the percentages of the phage-sensitive isolates, predominant group of the soft rot bacteria and species of the plants.View full abstractDownload PDF (644K) -
Diurnal Pattern of Conidial Release and Dispersal Under the Natural ConditionsChang Kyu KIM, Hong Sik MIN, Reiichi YOSHINO1990 Volume 56 Issue 3 Pages 315-321
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
JOURNAL FREE ACCESSConidial release and dispersal pattern of rice blast fungus, Pyricularia oryzae, were surveyed at one hour interval in the field conditions using three different types of spore trap in July of 1987. Under clear day condition, conidial release from naturally infected lesions and dispersal pattern exhibited one distinct peak around 7 a.m. Under continuous cloudy conditions, however, the appearance of peak continued relatively longer from 1 a.m. to 9 a.m. and two to three peaks were observed. During July 14-15, a continuous cloudy condition, temperature was around 22C and relative humidity was over 93% which are considered as optimum conditions for successful penetration of P. oryzae. Conidia produced under those conditions might have more important role as effective inoculum than conidia produced under a clear day condition.View full abstractDownload PDF (759K) -
Production of Susceptibility-Inducing Factor(s) from Germinating Spores and Their PhytotoxicitySakae ARASE, Satoko KINOSHITA, Mikio KANO, Mikio NOZU, Emiko TANAKA, S ...1990 Volume 56 Issue 3 Pages 322-330
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
JOURNAL FREE ACCESSThe factor(s) stimulating Pyricularia oryzae infection on rice leaves were detected by using a rice cv. Sekiguchi-asahi as a test plant. Factors were detected and partially purified from spore germination fluids of virulent P. oryzae isolates. Alternaria alternata spores, a non-pathogen of rice plants, formed numerous necrotic spots on rice leaves when inoculated with the factors, but not on several other non-host plants. The factors from P. oryzae were also found to be highly toxic to rice cv. Sekiguchi-asahi, and were extracted with ethyl acetate. The factors induced a characteristic necrosis on leaves of cv. Sekiguchi-asahi as those observed on inoculated leaves, but did not cause any symptom on leaves of cv. Shin 2. Furthermore, they inhibited strongly root growth of seedlings of cvs. Sekiguchi-asahi and Shin 2. However, phytotoxic metabolites such as tenuazonic acid, pyriculol and pyriculariol isolated from the culture filtrates of P. oryzae were not detected in the spore germination fluids. These results indicate that spores of P. oryzae release a new type of toxin(s) having susceptibility-inducing ability during germination.View full abstractDownload PDF (1335K) -
Susumu UEDA, Takumi YOSHIZAWA, Masahiro NAO1990 Volume 56 Issue 3 Pages 331-336
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
JOURNAL FREE ACCESSTo examine the producibility of Fusarium-mycotoxins such as trichothecenes and zearalenone, dispersal Gibberella zeae were collected in barley fields using the agar plates containing Komada medium, known to be a selective one for Fusarium species, and G. zeae ascospores were also isolated from perithecia found on rice stubbles in crop fields. After cultivation of these fungi on polished rice media, the mycotoxins produced were determined by GLC, HPLC and TLC. Of 32 isolates of dispersal ascospores, zearalenone was found in all cases, and 20 isolates (62.5%) produced the following trichothecenes: nivalenol and fusarenon X (15 isolates), deoxynivalenol and 3-acetyldeoxynivalenol (4 isolates), and T-2 toxin and neosolaniol (1 isolate). As for the trichothecene producibility of ascospores (14 isolates) from rice stubbles, only nivalenol and fusarenon X were produced by 13 isolates (92.9%), and none of other trichotheceneproducers was observed. Thus, dispersal toxigenic ascospores in fields could be efficiently trapped by the simple agar plate method. This fact suggests that it may be possible to assess the incidence of dispersal toxigenic ascospores in crop fields.View full abstractDownload PDF (692K) -
Nobuhiro SUZUKI, Yukio SHIRAKO, Yoshio EHARA1990 Volume 56 Issue 3 Pages 337-341
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Akira KAWAI, Takeshi NISHIO1990 Volume 56 Issue 3 Pages 342-345
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
JOURNAL FREE ACCESSAntigen of CTLV could be detected from diseased citrus leaves by ELISA using horseradish peroxidase-conjugated IgG (HRP-ELISA). In the HRP-ELISA procedure, sample and conjugate were mixed and incubated in the plate for 16hr at 4C. The relative sensitivity of antigen detection was 1:16, when the sample of the infected citrus leaf extract was diluted with healthy leaf extract. Citrus scions from post-entry quarantine and scions taken from citrus groves in Japan were tested by modified HRP-ELISA and by an inoculation test to Chenopodium quinoa. The results showed that ELISA was reliable method for detecting CTLV in citrus trees.View full abstractDownload PDF (444K) -
Light-Dependency of Leaf Necrosis Formation by Toxin(s) from Germinating SporesSakae ARASE, Kazumi KONDO, Yuichi HONDA, Mikio NOZU, Syoyo NISHIMURA1990 Volume 56 Issue 3 Pages 346-350
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Effect of Phosphatidyicholine on the Inhibitory Action of Aucuparin and Two Fungicides against FungiSiti Muslimah WIDYASTUTI, Fukuji NONAKA, Eiko MARUYAMA, Nobumichi SAKO1990 Volume 56 Issue 3 Pages 351-353
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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Tomohide NATSUAKI, Yoshihiro MUROI, Seiichi OKUDA, Michiaki TERANAKA1990 Volume 56 Issue 3 Pages 354-358
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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1990 Volume 56 Issue 3 Pages 359-429
Published: July 25, 1990
Released on J-STAGE: February 19, 2009
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