Effect of Seed‐Borne Fungi on the Physico‐chemical Properties of Sunflower Oil

Singh, Bhupinder; Prasad, T.

doi:10.1111/j.1439-0434.1977.tb03253.x

Cited by 8 publications

(6 citation statements)

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“…The increase in saponification number indicates the formation of large quantities of short chain fatty acid glycerides (SANKARAM 1966). Similar results showing increased saponification number have been reported earlier (LALITHAKUMARI et al 1971, SINGH andPRASAD 1977).…”

Section: Discussionsupporting

confidence: 90%

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Physico‐Chemical Properties of Linseed Oil as Affected by Various Seed‐Borne Fungi

Dubey

Vayas

Dubey

1985

Journal of Phytopathology

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The effect of six seed‐borne fungi on linseed oil was studied. Alternaria alternate, Aspergillus flavus, Aspergillus repens, Fusarium culmorum and Torula allii reduced oil content while Cladosporum herbarum slightly increased it. All fungi increased the free fatty acid content and saponification number linseed oil. Iodine number was decreased except in Cladosporium herbarum and Fusarium culmorum. Aspergillus flavus was the most destructive parasite in altering quantity and quality of linseed oil.

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Section: Discussionsupporting

confidence: 90%

“…The increase in free fatty acids, therefore, indicates that these fungi have high lipase activity. Similar results were obtained by SAUER and CHRISTENSEN ( ), DuBEY et al (1972 and SINGH and PRASAD (1977).…”

Section: Discussionsupporting

confidence: 90%

Physico‐Chemical Properties of Linseed Oil as Affected by Various Seed‐Borne Fungi

Dubey

Vayas

Dubey

1985

Journal of Phytopathology

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“…Selective utilization of unsaturated acids by R. solani might explain the decrease in iodine value in the later phase of incubation of both sesame and safflower oil. Cases where the iodine value remained unchanged (SINGH and PRASAD 1977) consumption rate of saturated and unsaturated acids appeared to be equal.…”

Section: Discussionmentioning

confidence: 95%

“…Nutrition level of seeds has been reported to be altered due to invasion by the storage fungi under such favourable conditions and the extracted oil shows changes in the physico-chemical properties (LALITHAKUMARI et al 1971, SHARMA 1981. In the present study, the extent of deterioration of autoclaved seeds (WARD and DIENER 1961, LALITHAKUMARI et al 1971, SINGH and PRASAD 1977 by predominant fungi (unpublished data) has been studied as it was not possible to get absolutely fungus free healthy seeds.…”

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confidence: 99%

Effect of Some Predominant Storage Fungi on Physico-Chemical Properties of Safflower and Sesame Oil

Bose

Nandi

1982

J Phytopathol

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“…Seed from infected heads give oil with a higher saturated fatty acid content (e.g., palmitic and stearic acids) than oil from healthy heads (21). Rhizopus may also affect the physical properties of the oil (color and saponification value) (17). For confectionery sunflower, achene size is an important quality factor; premium prices are paid for confectionery sunflower with a high percentage of large achenes.…”

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confidence: 99%

Rhizopus Head Rot of Confectionery Sunflower: Effects on Yield Quantity and Quality and Implications for Disease Management

Shtienberg¹

1997

Phytopathology®

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The effects of Rhizopus head rot, caused by Rhizopus oryzae, on the yield of confectionery sunflower and its quality were studied in field experiments conducted from 1994 to 1996. The extent of yield loss was related to the crop growth stage at inoculation. When heads were inoculated at the budding stage, loss was not apparent, because inoculated heads were not infected. When inoculated at the anthesis stage, loss was relatively high (42.5 to 99.1%), and both the number of achenes per head and the individual achene weight were reduced. When heads were inoculated at the seed development stage, yield was not reduced significantly (although the entire receptacle was rotted). Effects of Rhizopus head rot on measures of yield quality were examined as well. Inoculation with R. oryzae did not affect the size of the achenes at any crop growth stage. In contrast, the incidence of discolored achenes (an external sign of nutmeats with a bitter off-flavor) was affected by the disease at all crop growth stages. A survey in eight commercial fields from 1992 to 1996 found that, by the end of the season, incidence of disease ranged from 2.3 to 17.4%. However, since disease intensified late, resultant yield losses were minor and did not exceed 3.1%. Loss figures were estimated by means of a model that was developed and validated in the field experiments. The disease did affect the incidence of discolored achenes. Thus, the conclusion drawn is that the effects of Rhizopus head rot in confectionery sunflower on crop yield is of minimal concern, at least when disease intensifies late, as was the case in the studied fields, but management of the disease should be considered in some situations. The objectives would be to prevent a reduction in yield quality, not yield quantity.

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Effect of Seed‐Borne Fungi on the Physico‐chemical Properties of Sunflower Oil

Cited by 8 publications

References 1 publication

Physico‐Chemical Properties of Linseed Oil as Affected by Various Seed‐Borne Fungi

Physico‐Chemical Properties of Linseed Oil as Affected by Various Seed‐Borne Fungi

Effect of Some Predominant Storage Fungi on Physico-Chemical Properties of Safflower and Sesame Oil

Rhizopus Head Rot of Confectionery Sunflower: Effects on Yield Quantity and Quality and Implications for Disease Management

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