ChemInform Abstract: Fistupyrone, a Novel Inhibitor of the Infection of Chinese Cabbage by Alternaria brassicicola, from Streptomyces sp. TP-A0569

ChemInform ◽  
2001 ◽  
Vol 32 (8) ◽  
pp. no-no
Author(s):  
Yasuhiro Igarashi ◽  
Mio Ogawa ◽  
Yukio Sato ◽  
Noriko Saito ◽  
Ryuji Yoshida ◽  
...  
Keyword(s):  
Chinese Cabbage ◽  
Alternaria Brassicicola ◽  
Streptomyces Sp

scholarly journals Fistupyrone, a Novel Inhibitor of the Infection of Chinese Cabbage by Alternaria brassicicola, from Streptomyces sp. TP-A0569.

2000 ◽  
Vol 53 (10) ◽  
pp. 1117-1122 ◽  
Author(s):  
YASUHIRO IGARASHI ◽  
MIO OGAWA ◽  
YUKIO SATO ◽  
NORIKO SAITO ◽  
RYUJI YOSHIDA ◽  
...  
Keyword(s):  
Chinese Cabbage ◽  
Alternaria Brassicicola ◽  
Streptomyces Sp

Pathogenic fungal protein-induced resistance and its effects on vegetable diseases

2017 ◽  
Vol 155 (7) ◽  
pp. 1069-1081 ◽  
Author(s):  
T.-C. LIN ◽  
C.-L. LIN ◽  
W.-C. CHUNG ◽  
K.-R. CHUNG ◽  
J.-W. HUANG
Keyword(s):  
Chinese Cabbage ◽  
Fungal Pathogens ◽  
Plant Defence ◽  
Black Spot ◽  
Sweet Pepper ◽  
Alternaria Brassicicola ◽  
Biotic And Abiotic Stress ◽  
Promote Plant Growth ◽  
Test Plants ◽  
Reduce Disease Severity

SUMMARYPlant defence systems can be induced by biotic and abiotic stress. Experiments were undertaken to explore the feasibility of different fungal proteins for the reduction of vegetable diseases. Total proteins purified from three soil-borne and five foliar fungal pathogens had no fungistatic effects nor did they trigger hypersensitive reactions on test plants. The abilities to promote plant growth and to reduce disease severity varied among test proteins and plants. Depending on test proteins, experiments have demonstrated that exogenous application of fungal proteins could reduce Alternaria brassicicola-induced black spot severity on cabbage, Colletotrichum spp.-induced anthracnose on Chinese cabbage and cucumber, Rhizoctonia solani-induced damping-off on sweet pepper and Chinese cabbage, and powdery mildew on cucumber seedlings. An Alternariaprotein effector 1 (Ape1)-coding gene was cloned from two Alternaria spp. and expressed in Escherichia coli. The expressed Ape1 reduced anthracnose incidence on cucumber leaves, indicating that Ape1 was the primary activator in the crude protein extracts responsible for disease reduction. Application of Alternaria proteins onto Chinese cabbage seedlings caused an increase of phenylalanine ammonia lyase and peroxidase activities in treated seedlings, which may have played a role in host defence.

Dark leaf spot (Alternaria brassicicola) on Chinese cabbage: temporal spread and its influencing factors

2002 ◽  
Vol 53 (10) ◽  
pp. 1095 ◽  
Author(s):  
L. Y. Chen ◽  
T. V. Price
Keyword(s):  
Chinese Cabbage ◽  
Wind Direction ◽  
Leaf Spot ◽  
Irrigation System ◽  
Disease Incidence ◽  
Field Trials ◽  
Alternaria Brassicicola ◽  
Disease Spread ◽  
Average Wind ◽  
Temporal Spread

Temporal spread of dark leaf spot on Chinese cabbage was studied in experimental plots for 2 years. The effect of row orientation, the orientation of inoculated plants, and irrigation system on disease incidence and the effect of average wind direction on disease spread were investigated. A line source of inoculum in each plot was used for the 1993–94 summer and the 1994 spring–summer field trials, and 3 line sources for a 1995 autumn field trial. Disease progressed more rapidly in the 1993–94 summer than in the 1995 autumn. Disease epidemic did not develop in the 1994 spring–summer when environmental conditions were unfavourable. Disease incidence was higher in plots with row orientation parallel to the average wind direction than in plots with row orientation at right angles to the average wind direction for both the 1993–94 summer and the 1995 autumn trials. In summer 1993–94, across-row inoculation resulted in higher disease incidence than row inoculation did. No difference in disease incidence occurred between channel irrigation and overhead irrigation plots. Secondary infections always occurred adjacent to the source of inoculum and disease spread was influenced by the prevalent wind direction.

Specific inhibition of spore germination of Alternaria brassicicola by fistupyrone from Streptomyces sp. TP-A0569

2003 ◽  
Vol 69 (4) ◽  
pp. 211-217 ◽  
Author(s):  
Evelyn Aigho Aremu ◽  
Tamotsu Furumai ◽  
Yasuhiro Igarashi ◽  
Yukio Sato ◽  
Hajime Akamatsu ◽  
...  
Keyword(s):  
Spore Germination ◽  
Alternaria Brassicicola ◽  
Specific Inhibition ◽  
Streptomyces Sp

scholarly journals Brassica crops and a Streptomyces sp as potential biocontrol for clubroot of brassicas

2001 ◽  
Vol 54 ◽  
pp. 80-83 ◽  
Author(s):  
L-H Cheah ◽  
G. Kent ◽  
S. Gowers
Keyword(s):  
Brassica Rapa ◽  
Chinese Cabbage ◽  
Field Trial ◽  
Plasmodiophora Brassicae ◽  
Soil Samples ◽  
Streptomyces Sp ◽  
Brassica Crops ◽  
Glasshouse Experiment

Two glasshouse experiments and a field trial were carried out to evaluate the potential of brassica crops which contain high levels of glucosinolates for control of clubroot of brassicas Brassica rapa crops were grown for about 70 days in a field which was infested with Plasmodiophora brassicae In the first glasshouse experiment the leaf and stem of the plants were harvested chopped into small pieces and mixed with clubrootinfested soil in punnets Chinese cabbage seedlings were then transplanted into the punnets In the second glasshouse experiment soil samples were taken in punnets from plots where the B rapa crops had been rotary hoed and left to decompose for about three weeks Chinese cabbage seedlings were transplanted into the punnets In both experiments B rapatreated soil reduced (P

scholarly journals The biological control of seed-borne Alternaria brassicicola of cruciferous plants with a powdery preparation of Streptomyces sp.

1987 ◽  
Vol 59 (3) ◽  
pp. 199-208 ◽  
Author(s):  
Risto Tahvonen ◽  
Hanna Avikainen
Keyword(s):  
Biological Control ◽  
Brassica Species ◽  
Fine Sand ◽  
Alternaria Brassicicola ◽  
Damping Off ◽  
Streptomyces Sp ◽  
Seed Dressing ◽  
Dry Conditions ◽  
Cruciferous Plants ◽  
Different Origin

The effectiveness of a powdery preparation of a Streptomyces sp. isolate as a seed dressing agent against seed-borne Alternaria brassicicola on different Brassica species was investigated in the study. The preparation was made by freeze-drying and milling the biomass produced in a fermentor into a form suitable for use as a dusting agent. Seed dressing was 80—90 % successful in controlling damping-off from seeds artificially infected with A. brassicicola. The effectiveness of dressing remained unchanged on seeds stored under dry conditions for 5—6 weeks, but subsequently decreased slowly and was ca. 50 % six months after dusting. Streptomyces dressing controlled, in a manner comparable to chemical dressing with thiram, damping-off caused by Alternaria fungi on seedlings which were grown from commercial seed lots of different origin. The results of biological control of damping-off did not vary in the peat lots of different origin whose natural disease suppressivity varied considerably. The control result was the same or better than chemical dressing with thiram. The acidity of the substrate (pH 4.8—8.6) had no effect on the effectiveness of biological control. The results obtained against Alternaria damping-off were the same in other substrates clay, fine sand and mull as in peat.

scholarly journals Survey and prevalence of species causing Alternaria leaf spots on brassica species in Pernambuco

2012 ◽  
Vol 30 (2) ◽  
pp. 345-348 ◽  
Author(s):  
Sami J Michereff ◽  
Marissônia A Noronha ◽  
Maria S Xavier Filha ◽  
Marcos PS Câmara ◽  
Ailton Reis
Keyword(s):  
Chinese Cabbage ◽  
Brassica Species ◽  
Alternaria Brassicicola ◽  
Leaf Spot Disease ◽  
Vegetable Crops ◽  
Growing Seasons ◽  
Leaf Spots ◽  
Brassica Crops ◽  
Brassicaceae Species ◽  
Alternaria Species

Brassicaceae family comprises plant species that are very important as vegetable crops, such as the species complex Brassica oleracea and Brassica rapa. Alternaria brassicicola and A. brassicae are among the most important pathogens of Brassicaceae causing Alternaria leaf spot disease. The occurrence and prevalence of Alternaria species causing leaf spots in brassica crops in Pernambuco was acessed, as well as the existence of a possible preference by vegetable host for these pathogens. Twenty-eight fields were surveyed in the Agreste region of Pernambuco state, in the 2005 and 2006 growing seasons. In each year, 10 Chinese cabbage, six cabbage, six cauliflower and six broccoli fields were visited. In each field, 50 leaves showing at least five lesions were randomly collected. Species identification was performed taking into account morphology of the conidia that was compared with literature data. Among the two Alternaria species found, A. brassicae was found in all Chinese cabbage fields while A. brassicicola was found in all fields of cabbage, cauliflower and broccoli. Overall, A. brassicicola was more prevalent than A. brassicae. In Chinese cabbage there was predominance of A. brassicae, with mean prevalence of 91.0% and 96.5% in 2005 and 2006. On the other hand, in broccoli and cabbage there was high predominance of A. brassicicola, with mean prevalence between 95.1% and 99.8%. In cauliflower, although the prevalence has been of A. brassicicola, high frequency of A. brassicae was noted. The frequency of co-occurrence of both Alternaria species was very low. The results of this study reinforce the hypothesis of existence of host preference within species of Alternaria that cause leaf spots in brassica crops, especially when Chinese cabbage, broccoli and cabbage are considered. This information is critical to developing strategies for managing Alternaria leaf spots in Brassicaceae species.

Dark leaf spot (Alternaria brassicicola) on Chinese cabbage: spatial patterns

2005 ◽  
Vol 56 (7) ◽  
pp. 699 ◽  
Author(s):  
L. Y. Chen ◽  
T. V. Price ◽  
M. J. Silvapulle
Keyword(s):  
Chinese Cabbage ◽  
Leaf Spot ◽  
Disease Incidence ◽  
Field Trials ◽  
Alternaria Brassicicola ◽  
Disease Spread ◽  
Distance Class ◽  
Maximum Information ◽  
Spatial Spread ◽  
Core Cluster

The spatial spread of dark leaf spot caused by Alternaria brassicicola on Chinese cabbage was characterised over 2 years. The study was conducted in 2 field trials using ordinary runs, mapping, spatial autocorrelation, and 2-dimensional distance class analyses. Diseased plants were generally clustered and cluster orientation coincided with the line of inoculation. Disease spread was greater within than across rows. The maximum number of spatial lags with significantly positive autocorrelations occurred when disease incidence levels reached 20–80% in summer 1993–94. Core cluster size generally increased with disease incidence. Two-dimensional distance class analysis was the best analytical method among those used in describing spatial spread of the disease as it did not only provide maximum information but also considered missing data.

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