Nature of Variation in Helminthosporium sativum

Christensen, Jens J.; Davies, F. R.

doi:10.2307/3754203

Cited by 7 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Broadfoot (1933) has stated that what is toxic in culture may or may not be toxic in soil. Similar results were also obtained by Cordon & Haenseler (1939), Christensen & Davis (1940) and Katznelson (1942).…”

Section: Discussionsupporting

confidence: 90%

STUDIES ON THE EFFECT OF ASSOCIATED SOIL MICROFLORA ON FUSARIUM UDUM BUTL., THE FUNGUS CAUSING WILT OF PIGEON‐PEA (CAJANUS CAJAN (L.) MILLSP.), WITH SPECIAL REFERENCE TO ITS PATHOGENICITY

Vasudeva

Govindaswamy

1953

Annals of Applied Biology

View full text Add to dashboard Cite

The interaction of certain soil saprophytes and Fusarium udum, the wilt organism of pigeon‐pea, with special reference to their effect on pathogenicity, has been studied. The filtrates of Aspergillus niger, Rhizopus nigricans and mixed filtrates of all the saprophytes inhibited the growth of Fusarium udum on solid medium. This inhibition of F. udum has been shown to be due to unfavourable reaction of the medium rather than to food exhaustion or the presence of toxic substances. The culture filtrates after passage through soil beds failed to affect adversely the growth of F. udum because of the change in pH. Inoculation experiments have indicated that only Rhizopus nigricans is effective in reducing the incidence of wilt because of its faster rate of growth. The mixed inocula of the organisms and mixed filtrates of all the saprophytes have also been observed to be effective in reducing wilt incidence. Aspergillus terreus appears to enhance the virulence of Fusarium udum.

show abstract

Section: Discussionsupporting

confidence: 90%

STUDIES ON THE EFFECT OF ASSOCIATED SOIL MICROFLORA ON FUSARIUM UDUM BUTL., THE FUNGUS CAUSING WILT OF PIGEON‐PEA (CAJANUS CAJAN (L.) MILLSP.), WITH SPECIAL REFERENCE TO ITS PATHOGENICITY

Vasudeva

Govindaswamy

1953

Annals of Applied Biology

View full text Add to dashboard Cite

show abstract

“…Helminthosporium sativum) is an important pathogen, causing seedling blight, root rots, basal stem rot, spike and seed blight, leaf spots, stem lesions and premature death of wheat, barley, rye and many grasses. This fungus has different morphological and physiological forms which mutate readily, influencing its pathogenicity (Christensen 1925;Christensen and Davies 1937). Many attempts have been made to study characteristics relating to their pathogenicity, morphology and genetics (Wood 1962;Harding 1975;Misra 1979).…”

Section: Introductionmentioning

confidence: 99%

Purification and characterization of ββ‐N‐acetylhexosaminidase from the phytopathogenic fungusBipolaris sorokiniana

Geimba

Riffel

Brandelli

1998

Journal of Applied Microbiology

View full text Add to dashboard Cite

N‐acetylhexosaminidase (HEX) from the phytopathogenic fungus Bipolaris sorokiniana was isolated and characterized. The production of HEX by B. sorokiniana was not altered by growing on different carbon sources. Enzyme purification was carried out by sequential liquid chromatography on Sephacryl S‐200 HR, and p‐aminobenzyl‐2‐acetamido‐2‐deoxy‐β‐d‐thioglucopyranoside agarose. The purification was about 70‐fold, with a yield of 41%, determined with p‐nitrophenyl‐N‐acetylglucosaminide as substrate. The enzyme had pH and temperature optima of 4·5 and 55 °C, respectively. The molecular weight of non‐denatured enzyme was estimated as 120 000 Da by gel filtration chromatography, and about 55 000 Da by SDS‐PAGE. The fungal HEX had glycosylated residues as evidenced by binding to Concanavalin‐A. Bipolaris sorokiniana enzyme was also active with p‐nitrophenyl‐chitobioside and p‐nitrophenyl‐N‐acetylgalactosaminide as substrates.

show abstract

“…This fungus present different morphological and physiological forms which mutate readily, in¯uencing its pathogenicity. 13 Many efforts have been made to investigate their pathogenicity, morphology and genetics.…”

Section: 9mentioning

confidence: 99%

Characterisation of cellulose-hydrolysing enzymes from the fungusBipolaris sorokiniana

Geimba

Riffel

Agostini

et al. 1999

J. Sci. Food Agric.

View full text Add to dashboard Cite

Nature of Variation in Helminthosporium sativum

Cited by 7 publications

References 0 publications

STUDIES ON THE EFFECT OF ASSOCIATED SOIL MICROFLORA ON FUSARIUM UDUM BUTL., THE FUNGUS CAUSING WILT OF PIGEON‐PEA (CAJANUS CAJAN (L.) MILLSP.), WITH SPECIAL REFERENCE TO ITS PATHOGENICITY

STUDIES ON THE EFFECT OF ASSOCIATED SOIL MICROFLORA ON FUSARIUM UDUM BUTL., THE FUNGUS CAUSING WILT OF PIGEON‐PEA (CAJANUS CAJAN (L.) MILLSP.), WITH SPECIAL REFERENCE TO ITS PATHOGENICITY

Purification and characterization of ββ‐N‐acetylhexosaminidase from the phytopathogenic fungusBipolaris sorokiniana

Characterisation of cellulose-hydrolysing enzymes from the fungusBipolaris sorokiniana

Contact Info

Product

Resources

About