共查询到20条相似文献,搜索用时 18 毫秒
1.
Fatma F. Abdel-Motaal Magdi A. El-Sayed Soad A. El-Zayat Mortada S. M. Nassar Shin-ichi Ito 《Journal of General Plant Pathology》2010,76(5):358-361
Floral rot of Egyptian henbane (Hyoscyamus muticus L.) was found on potted plants in a greenhouse in Yamaguchi city, Japan, in the late summer of 2008 and 2009. The symptoms
were identical to those of rots caused by Choanephora species. The pathogen was isolated and identified as C. cucurbitarum (Berkeley and Ravenel) Thaxter. This new disease was named Choanephora rot (Kougai-kabi-byo) of Egyptian henbane. 相似文献
2.
Ayaka Minoshima Jun Takeuchi Tsuyoshi Ono Satoshi Kagiwada Hiromichi Horie Yuuri Hirooka 《Journal of General Plant Pathology》2017,83(2):113-116
In September 2014, Phytophthora rot on wasabi plants [Wasabia japonica (Miq.) Matsum.] was found for the first time in the city of Okutama, Tokyo, Japan. A Phytophthora sp. strain was constantly isolated from brown stem bases and rhizomes of infected plants. The same symptoms as those observed in the field were produced in vitro through inoculation of test plants with the isolated Phytophthora sp. The fungus was identified as Phytophthora drechsleri based on morphological and DNA sequence comparison. Phytophthora rot, “eki-byo” in Japanese, is proposed for this disease common name. 相似文献
3.
Hideshi Kawarazaki Yoshiyuki Nara Toshio Kijima Masao Goto 《Journal of General Plant Pathology》2008,74(1):94-95
A new leaf rot disease was found on the leaves of figmarigold (Lampranthus spectabile). The causal organism, identified as Pythium aphanidermatum was found to cause the same symptoms after artificial inoculation and was then reisolated from the inoculated plants. We
propose to name the disease Pythium rot of figmarigold. 相似文献
4.
Mamoru Satou Yoshiaki Chikuo Yosuke Matsushita Katsuhiko Sumitomo 《Journal of General Plant Pathology》2010,76(3):225-228
Cutting rot of chrysanthemum was found on cuttings of cv. Jimba No.2 in 2008. The cuttings were imported, then transplanted
in Aichi Prefecture. Root development was not initiated in about 30% of the cuttings. The cut stem ends developed black discolouration
and decay. When healthy cuttings were the fungus isolated from diseased cuttings, these cuttings developed the same disease
symptoms. The characteristics and morphology of the fungal culture were identical to those of Plectosporium tabacinum. We propose that the new disease be named cutting rot of chrysanthemum. 相似文献
5.
Masamichi Isogai Koji Ishii Seisaku Umemoto Manabu Watanabe Nobuyuki Yoshikawa 《Journal of General Plant Pathology》2009,75(2):140-143
Virus-like symptoms—red ringspots on stems and leaves, circular blotches or pale spots on fruit—were found on commercial highbush
blueberry (Vaccinium
corymbosum) cultivars Blueray, Weymouth, Duke and Sierra in Japan. In PCR testing, single DNA fragments were amplified from total nucleic
acid samples of the diseased blueberry bushes using primers specific to Blueberry red ringspot virus (BRRV). Sequencing analysis of the amplified products revealed 95.7–97.7% nucleotide sequence identity with the BRRV genome.
This paper is the first report of blueberry red ringspot disease caused by BRRV in Japan.
The nucleotide sequence data reported in this paper are available in the GenBank/EMBL/DDBJ database as accessions AB469884
to AB469893 for BRRV isolates from Japan. 相似文献
6.
Atsushi Ajitomi Tetsuya Takushi Atsushi Ooshiro Maki Yamashiro Satoshi Taba 《Journal of General Plant Pathology》2018,84(1):70-72
A panicle blight with sclerotia was found on mango (Mangifera indica L.) in Okinawa Prefecture, Japan, in March 2016. Water-soaked lesions with white mycelia developed on panicles in the flowering stage; softening and decay of panicles was followed by formation of sclerotia. The fungus isolated from these sclerotia was identified as Sclerotinia sclerotiorum based on morphology and analysis of rDNA-ITS sequences. The isolate reproduced the symptoms on mango panicles in an inoculation test and was reisolated from flower stalks. This is the first report of sclerotinia rot (kinkaku-byo in Japanese) on mango caused by S. sclerotiorum in Japan. 相似文献
7.
Rie Gappa-Adachi Kazutaka Yano Shigeharu Takeuchi Yasuaki Morita Seiji Uematsu 《Journal of General Plant Pathology》2012,78(1):39-42
In 2004, a damping-off symptom was found on southern star, Oxypetalum caeruleum, in Kochi Prefecture, Japan. Two Phytophthora strains with different colony patterns on potato dextrose agar were isolated, and their pathogenicity was confirmed by inoculation
of southern star plants and their reisolation from symptomatic plants. Both fungi were identified as Phytophthora palmivora based on morphology, physiology, and sequence analysis of the internal transcribed spacers of nuclear ribosomal DNA. This
is the first report of Phytophthora blight of southern star in the world. 相似文献
8.
Masaharu Kubota Kazufumi Nishi Emi Kato Fumihiro Terami 《Journal of General Plant Pathology》2011,77(1):68-71
In July 2006, black rot was observed on the leaves of 4-leaf-stage seedlings of salt-wort (Salsola komarovii) in Yamagata Prefecture, Japan. We isolated two single-conidial isolates from the diseased leaves. Although colony appearance
of the isolates was different from that of each other, both isolates were identified as Colletotrichum truncatum by morphology and molecular similarity. After inoculation of healthy salt-wort plants with the isolates, the isolates were
reisolated from symptomatic plants. We thus propose a new disease, anthracnose of salt-wort. 相似文献
9.
Blight on leaves, stems and bulbs of lilies grown in a greenhouse were found in Hokkaido, Japan, in 2012. Two isolates obtained from the lesions were identified as Rhizoctonia solani anastomosis group (AG)-11 based on morphology and molecular analysis. Original symptoms were reproduced after artificial inoculation with the isolates. Except for R. solani AG-2-1 and AG-4 HG-I, none of the AGs have been reported as pathogens causing lily Rhizoctonia disease in Japan; therefore, we propose adding AG-11 as a pathogen of the disease. More importantly, we report the first appearance of crop disease caused by AG-11 in Japan. 相似文献
10.
Keisuke Tomioka Yuuri Hirooka Takayuki Aoki Toyozo Sato 《Journal of General Plant Pathology》2008,74(3):264-266
Severe rot of leaves, peduncles and flowers caused by Gibberella zeae (anamorph: Fusarium
graminearum) was found on potted plants of hyacinth (Hyacinthus orientalis), a liliaceous ornamental, in greenhouses in Kagawa Prefecture, Japan, in January 2001. This disease was named “Fusarium
rot of hyacinth” as a new disease because only the anamorph, F.
graminearum, was identified on the diseased host plant.
The authors contributed equally to this work.
The fungal isolate and its nucleotide sequence data obtained in this study were deposited in the Genebank, National Institute
of Agrobiological Sciences and the DDBJ/EMBL/GenBank databases under the accession numbers MAFF239499 and AB366161, respectively. 相似文献
11.
12.
Shima Bagherabadi Doustmorad Zafari Yousef Moradi Amirabad Joyce H. C. Woudenberg 《Journal of General Plant Pathology》2017,83(6):398-401
Drimia maritima (squill) is a historically important medicinal plant. During the spring of 2016, small, yellow leaf spots, which became brown and finally necrotic, were observed on squill plants in Kohgiluyeh and Boyer-Ahmad Provinces in Iran. A fungus was consistently isolated from infected leaves and identified as Alternaria alternata based on morphological and phylogenetic analyses. Pathogenicity tests confirmed A. alternata to be the causal agent of the newly observed leaf spot disease. This is the first report of leaf spot on D. maritima caused by A. alternata in the world. 相似文献
13.
Hibiscus syriacus, as a national flower of Korea, is most popularly used for ornamental purposes and includes numerous cultivars, and it is widely planted in temperate zones that feature hot summers. We investigated Choanephora flower rot on H. syriacus from 2012 to 2014 in Korea and Japan and confirmed Choanephora infection in several localities in both countries. Here, our objectives were to identify the main causal agent of Choanephora flower rot on H. syriacus and describe its morphological and molecular characteristics. We identified 44 out of 50 isolates as Choanephora cucurbitarum and the remainder as C. infundibulifera based on morphological characterization and phylogenetic analysis. The sequences of the internal transcribed spacer region (ITS) of ribosomal DNA and the D1/D2 region of the large subunit (LSU) rDNA of examined isolates were compared with sequences obtained from GenBank, and the analysis of the results revealed 100 % identity with the corresponding sequences of C. cucurbitarum and C. infundibulifera strains. Classification of the Choanephora species performed here according to the key described by Kirk (1984) corresponded with the results of the phylogenetic analysis of this study. Through intraspecific and interspecific mating tests, the characteristics of zygospore were described in details. Pathogenicity tests using both species showed the same symptoms, causing blossom blight and soft rot on the flowers, which were identical to those observed in the field. All identified causal agents of Choanephora rot were indeed Choanephora species, where C. cucurbitarum was identified in the majority, while the others were in the minority of examined samples. 相似文献
14.
Masashi Fujinaga Naho Yamagishi Hideki Ogiso Jun Takeuchi Jouji Moriwaki Toyozo Sato 《Journal of General Plant Pathology》2011,77(4):243-247
A new disease was found in Japan, on celery (Apium graveolens var. dulce) having severe chlorotic leaf spot, stunt, and dwarf with leaf curl. A spore suspension from the fungus isolated from affected
plants induced identical symptoms 14 days after plants were sprayed. Identification and molecular characterization showed
that the causal agent is Colletotrichum simmondsii. This report is the first of stunt anthracnose on celery caused by C. simmondsii. We propose the name “stunt anthracnose” for the new disease. Colletotrichum acutatum sensu lato, as reference pathogen of celery anthracnose, should be changed to C. fioriniae based on morphological and molecular characteristics. 相似文献
15.
Susan J. Sprague Barbara J. Howlett John A. Kirkegaard 《European journal of plant pathology / European Foundation for Plant Pathology》2009,125(2):189-202
The infection of above-ground tissues of Brassica napus by Leptosphaeria maculans is well understood. However, root infection (root rot) under field conditions, the development of root rot over time and
its relationship to other disease symptoms caused by L. maculans has not been described. A survey of B. napus crops was conducted in Australia to investigate the incidence and severity of root rot. Additionally, the pathway of root
infection was examined in field experiments. Root rot was present in 95% of the 127 crops surveyed. The severity and incidence
of root rot was significantly correlated with that of crown canker; however, the strength of this relationship was dependent
on the season. Root rot symptoms appeared before flowering and increased in severity during flowering and at maturity, a pattern
similar to crown canker suggesting that the infection of the root is an extension of the crown canker phase of the L. maculans lifecycle. All isolates of L. maculans tested in glasshouse experiments caused root rot and crown canker in B. napus and Brassica juncea. In the field, the main pathway of root infection is via invasion of cotyledons or leaves by airborne ascospores, rather
than from inoculum in the soil. Root rot was present in crops in fields that had never been sown to B. napus previously, in plants grown in fumigated fields, and in glasshouse-grown plants inoculated in the hypocotyl with L. maculans. 相似文献
16.
A severe rot of postharvest fruits of sweet pepper, a variety of Capsicum annuum, was found in Kagawa Prefecture in southwestern Japan in August 1999. A fungus, isolated repeatedly from the diseased fruits
and identified as Stemphylium lycopersici, was demonstrated to be pathogenic to fruits of sweet pepper. The disease was new to Japan, and the fungus was added to the
pathogens causing fruit rot of C. annuum. 相似文献
17.
Kazutaka Kido Rie Adachi Masaru Hasegawa Kazutaka Yano Yasufumi Hikichi Shigeharu Takeuchi Tae Atsuchi Yuichi Takikawa 《Journal of General Plant Pathology》2008,74(4):302-312
An internal fruit rot with a malodor was found in netted melons (Cucumis melo L.) in commercial greenhouses in Kochi Prefecture, Japan, in 1998, despite their healthy appearance and lack of water-soaking
or brown spots on the surface. A yellow bacterium was consistently isolated from the affected fruits. To confirm the pathogenicity
of eight representative isolates of the yellow bacterium, we stub-inoculated ovaries (immature-fruits) 5–7 days after artificial
pollination, with a pin smeared with bacteria. After the melon fruits had grown for 60 more days, an internal fruit rot resembling
the natural infection appeared, and the inoculated bacterium was reisolated. The melon isolates had properties identical with
Pantoea ananatis, such as gram-negative staining, facultative anaerobic growth, indole production, phenylalanine deaminase absence, and acid
production from melibiose, sorbitol, glycerol, and inositol. Phylogenetic analysis based on 16S rDNA sequences showed that
the melon bacterium positioned closely with known P. ananatis strains. The melon bacterium had indole acetic acid (IAA) biosynthesis genes (iaaM and iaaH) and a cytokinin biosynthesis gene (etz). The bacterium could be distinguished from the other ‘Pantoea’ group strains by rep-PCR genomic fingerprinting. From these results, the causal agent of internal fruit rot was identified
as a strain of P.ananatis [Serrano in (Philipp J Sci 36:271–305, 1928); Mergaert et al. in (Int J Syst Bacteriol 43:162–173, 1993)].
The nucleotide sequence data reported are available in the DDBJ database under accessions AB297969, AB373739, AB373740, AB373741,
AB373742, AB373743 and AB373744. 相似文献
18.
Citrus psorosis virus (CPsV) was detected from citrus trees for the first time in Japan. The diagnosis was confirmed by molecular, serological,
and biological indexing. RT-PCR detected CPsV from two citrus trees among ca. 200 tested. Both trees were variety Shiranui
of [Citrus unshiu Marc. × C. sinensis (L.) Osb.] × C. reticulata Blanco, and neither had the bark scaling symptom typical of CPsV. The CPsV isolate could be genetically related to those
from Spain, Italy, Florida, and California. 相似文献
19.
Ear rot with white or pink mold was found on corn (Zea mays L.). A species of Fusarium, not registered previously as a pathogen causing Gibberella ear rot of corn in Japan, was isolated from the rotted ear. The isolates, identified as F. asiaticum based on morphological characteristics and nucleotide sequences, caused white or pink mold on corn ear after inoculation. Moreover, the 3-acetyl deoxynivalenol chemotype and the nivalenol chemotype were found in the isolates. We propose to include F. asiaticum as one of the pathogens causing Gibberella ear rot of corn in Japan. 相似文献
20.
Atsushi Ajitomi Tetsuya Takushi Toyozo Sato Atsushi Ooshiro Maki Yamashiro 《Journal of General Plant Pathology》2017,83(5):299-303
Flyspeck symptoms were found on mango (Mangifera indica L.) in Okinawa Prefecture, Japan in June 2014. Just before harvest, surfaces of fruits and green branches developed groups of tiny black dots within dark smudges. A fungus was isolated from the dots on both fruits and branches. The isolates were identified as Stomiopeltis sp. based on pathogenicity, morphology and molecular phylogenetic analyses with rDNA-ITS and LSU sequences. This is the first report of flyspeck (susuten-byo in Japanese) on mango caused by Stomiopeltis sp. in Japan. 相似文献