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Annals of Applied Biology
LISKER, N., Department of Stored Products, Institute for Technology and Storage of Agricultural Products, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
BEN‐EFRAIM, A., Department of Stored Products, Institute for Technology and Storage of Agricultural Products, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
HENIS, Y., Department of Plant Pathology and Microbiology, The Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot, 76100, Israel
US Grade 2 soybeans contain about 20% cracked and split seeds, 3% damaged seeds and 2% foreign material. Examination by scanning electron microscopy showed that intact seeds were externally almost free of microorganisms. In cracked seed coats and in damaged areas on broken soybeans, profusely developing fungal mycelia were frequently observed. Fungi penetrated the beans through these cracks and through the micropyle. Penetration through the hilum was observed only in cases where the seed coats showed pronounced signs of damage. No penetration through pore‐like structures in the seed coat could be observed. Light microscope observations of sections of naturally infested soybeans showed little penetration into the underlying cell layers. Sections of soybeans kept at 99% r.h. and 26d̀C for 4 days revealed profusely developing fungi colonising both seed coat tissue and cotyledons. In the cotyledonous tissue hyphae did not penetrate into the cells but developed only in the intercellular spaces. In inoculated, detached seed coats, fungi developed better on the inner than on the outer side. On cotyledons free of seed coats, fungal development was better than in the seed coat itself. In broken soybeans of commercial stock origin, free fatty acids (FFA), mould count and respiration rate increased 3.5‐, 3.5‐and 5.0‐fold, respectively as compared with intact ones. When broken and intact soybeans were mixed there was no increase in the rate of deterioration. It is concluded that fungi are involved in the increase of FFA in soybeans during storage and that this process is significantly faster in the broken bean fraction. Copyright © 1985, Wiley Blackwell. All rights reserved
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Fungi growing on stored soybeans and their significance in lipid breakdown*
107
LISKER, N., Department of Stored Products, Institute for Technology and Storage of Agricultural Products, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
BEN‐EFRAIM, A., Department of Stored Products, Institute for Technology and Storage of Agricultural Products, Agricultural Research Organization, The Volcani Center, P.O.B. 6, Bet Dagan, 50250, Israel
HENIS, Y., Department of Plant Pathology and Microbiology, The Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot, 76100, Israel
Fungi growing on stored soybeans and their significance in lipid breakdown*
US Grade 2 soybeans contain about 20% cracked and split seeds, 3% damaged seeds and 2% foreign material. Examination by scanning electron microscopy showed that intact seeds were externally almost free of microorganisms. In cracked seed coats and in damaged areas on broken soybeans, profusely developing fungal mycelia were frequently observed. Fungi penetrated the beans through these cracks and through the micropyle. Penetration through the hilum was observed only in cases where the seed coats showed pronounced signs of damage. No penetration through pore‐like structures in the seed coat could be observed. Light microscope observations of sections of naturally infested soybeans showed little penetration into the underlying cell layers. Sections of soybeans kept at 99% r.h. and 26d̀C for 4 days revealed profusely developing fungi colonising both seed coat tissue and cotyledons. In the cotyledonous tissue hyphae did not penetrate into the cells but developed only in the intercellular spaces. In inoculated, detached seed coats, fungi developed better on the inner than on the outer side. On cotyledons free of seed coats, fungal development was better than in the seed coat itself. In broken soybeans of commercial stock origin, free fatty acids (FFA), mould count and respiration rate increased 3.5‐, 3.5‐and 5.0‐fold, respectively as compared with intact ones. When broken and intact soybeans were mixed there was no increase in the rate of deterioration. It is concluded that fungi are involved in the increase of FFA in soybeans during storage and that this process is significantly faster in the broken bean fraction. Copyright © 1985, Wiley Blackwell. All rights reserved
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