摘要:

AbstractSweet corn seed from several maize dwarf mosaic virus (MDMV)‐infected hybrids grown in the field were tested for transmission of MDMV through the seed. Seeds collected in 1979, 1980, 1981, and 1982, were germinated in the greenhouse the following winters. Only one seedling of 22,189 was MDMV‐infected During the last three years, seed were dissected at different maturities and the seed parts tested for the presence of MDMV by both infectivity and enzyme‐linked immunosorbent assay (ELISA). At 21 days after pollination, MDMV always was detected in the pericarp, but rarely in the endosperm or embryo. No MDMV was detected in the embryo of mature kernels, but virus occasionally was detected in the endosperm and pericarp. MDMV was regularly detected in unfertilized kernels and whole silks, but not in pollen by infectivity, ELISA or serological specific electron microscopy. MDMV was detected in glumes and whole an

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00746.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractWhen submers cultures ofFusarium solanif. sp.pisiandArmillaria melleawere grown in a medium supplemented with 0.5 % suberin isolated from raspberry periderm, hydrolytic enzymes were produced and measured by a spectrophotometric assay using p‐nitrophenyl butyrate as substrate. The enzymatic activity in the culture fluids reached its peak after 32 to 44 days of incubation. In a gas‐chromatographic assay of the enzymatic degradation of suberin, concentrated culture fluids of suberin‐grown fungi were incubated with raspberry suberin. The culture fluids ofF. solaniandA. melleacatalyzed the release of chloroform‐soluble products, which were analyzed by gas‐liquid chromatography. Suberin monomers like fatty alcohols and acids with chain‐lengths from C16to C26as well as C16and C18ω‐hy‐droxyacids could be identified as products. The suberin‐induced enzymes showed catalytic properties similar to cutin‐hydrolyzing enzymes previously isolated

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00747.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractThe result obtained showed that TMV isolates all of the type strain of the virus occurred in and could be isolated from water samples of the rivers Danube Sava collected in 1982 in Yugoslavia

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00748.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractDaedalea flavidaLév. causes considerable damage to bamboos. Bamboo tissues become soft, discoloured and fibrous. The pathogen causes considerable decay of internodes (about 22%) and rhizomes (about 38%). The pathogen attacks the cells of vascular bundles, bundle sheath sclerenchyma and phloem cells; it does not attack epidermis, hypodermis, and peripheral sclerenchyma tissues. Fungal hyphae grow longitudinal and transverse in host tissues. The parasite decomposes both cellulose and lignin

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00749.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractHistopathological and cytopathological abberations detected by anatomy and staining reactions indicated the association of mycoplasma‐like organisms with the little leaf disease of eucalypt in Kerala.These light and fluorescent microscopic techniques, specially dienes’reaction, can be used routinely to distinguish between little leaf disease caused by mycoplasma‐like organisms and little leaf induced by some other f

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00750.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractIn a casein nutrient solution,Verticillium fungiocla, the causal agent of the dry bubble disease of the cultivated mushroomAgaricus bisporus, produces a proteolytic enzyme. The effects of the pH and of inhibitors on the protease activity and the heat stability of the enzyme are described. The protease is of interest in connection with the attacking mechanism ofVerticillium fungicola.

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00751.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractWater‐soluble mycelial antigens from two physiological races (2 and 3) ofFusarium oxysporum L. sp.lupiniwere compared by tandem‐crossed immunoelectrophoresis. When antiserum against race 3 was tested some 50 antigens were detected. The two races had apparently almost identical antigenic patterns differing only in one antigen specific to race 3. This specific antigen might be related to the virulence of this fun

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00752.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractA proposal is made of improved terminology concerning interactions between plants and non‐cellular or cellular organisms. Classification of the relationships is based on the existence of basic incompatibility (incongruity) and basic compatibility (congruity) characterized by non‐host‐non‐pathogen or host‐pathogen relationships. Basic compatibility is divided into 3 subsystems according to the expression of interaction specificity: 1. non‐specific, 2. specific differentiated and 3. specific non‐differentiated incompatibility or compatibility. Description is made of the expected mechanisms determining specificity and main criteria which can be used for their distinction. Some evolutionary aspects are a

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00753.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractConidium ontogeny of twenty‐three isolates ofPyricularia(including international races, some nutritional, coloured mutants and isolates obtained from cultivated and wild species of Gramineae) was studied. Among them, sixteen isolates were found to be of typical blastic type of conidiogenesis characteristic of the genusPyricularia. Three coloured mutants and an international race showed gangliar type of conidiogenesis. However, two races and one nutritional mutant showed both the types.Most of the isolates tested are morphologically indistinguishable and potentially pathogenic with the respective hosts and on differential cultivars. Possible alteration of morphogenetic pattern of conidiogenesis by mutation and temperature response is suggeste

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00754.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

AbstractOut of eleven fungicides, Ridomil, Aliette (systemic) and Euparen M were most effective in inactivating the fungus mycelium in the soil within 2 day. They also completely inhibited the production of sporangia and oospores. These fungicides and Antracol also reduced the viability (50–100%) of sporangia in the soil. They also reduced the viability of oospores along with Mancozeb, Zineb liquid Ziram. Euparen M, Antracol, Mancozeb, Zineb and liquid Ziram completely killed Zoospores; Ridomil, Previcur and Aliette were also effective. These fungicides can thus reduce the incoculum potential of the pathogen in the soil and reduce the chances of new infection

ISSN:0931-1785    

DOI:10.1111/j.1439-0434.1984.tb00755.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY