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5173419 Purified chitinases and use thereof
377
PATENT ABSTRACTS
5171686 USE OF NATIVE ASPERGILLUS FLAVUS STRAINS TO PREVENT AFLATOXIN CONTAMINATION Peter Cotty assigned to The United States of America as represented by the United States Department of Agriculture Methods and compositions are provided for the control or prevention of aflatoxin contamination of agricultural commodities. Non-toxigenic strains of Asperglllus flavus are shown to inhibit aflatoxin production by toxigenic strains. Additionally, the non-toxigenic strains produce a factor in culture that alone inhibits aflatoxin production by toxigenic strains.
CHITINASES THEREOF
5177063 AVERMECTIN COMPOUNDS WITH A 6,5-SPIROKETAL RING SYSTEM Peter T Meinke assigned to Merck & Co lnc
5173419 PURIFIED
Disclosed herein is a process for breeding a glabrous variety of rice crop, this process comprising the steps of culturing tissues from a target rice plant, culturing the calli formed to a regeneration medium, growing the regenerates and selecting glabrous plants therefrom them, a new and distinct variety of a glabrous variety of a rice plant obtained by this process, and a process for the production of a glabrous plant which comprises further reproducing the plants. This glabrous variety is useful for rice cultivation.
AND USE
Gary E Harman, Roxanne Broadway, Arne Tronsmo, Matteo Lorito assigned to Cornell Research Foundation Inc Two chitinases from Trichoderma harzianum P1 (ATCC 74058) show chitin-containingfungus- and insect-inhibiting activity. The first is an endochitinase having a molecular weight of 36 kDa and an isoelectric point of 5.3+/-0.2. The second is an exochitinase having a molecular weight of 36 kDa an an isoelectric point of 4.4 +/-0.2. The chitinases can be applied in contact with chitin-containing fungus or insect as an inhibitor thereof. The chitinases can be applied to plants or to soil around plants which need production from a chitinase-containing pest. The chitinases can also be used to isolate genes coding for them which can be inserted into a genome of a plant needing protection from a chitinase-containing pest or into the genome of a microorganism to provide transgenic microorganism useful to produce enzyme or as a biocontrol agent. 5173423 PROCESS FOR BREEDING A GLABROUS VARIETY OF RICE CROP AND A GLABROUS PLANT Akir Nishikawa, Toshiya Yamamoto, Seiichi Tuji, Hirochika Sakano, Hideo Hirohara, Sanda, Japan assigned to Sumitomo Chemical Company Limited
Avermectin analogs are disclosed wherein the 6,6-spiroketal ring system has been reduced in size to a 6,5-spiroketal ring system by the deletion of the 25-position carbon atom and the 25alkyl substituent. This is accomplished by opening the outer spiroketal ring with the elimination of ring carbon atoms 23, 24 and 25 and the alkyl substituent at the 25-position and incorporation a new component, reclosing the spiroketal to a 5-membered ring with new substituents at the 24-position. The compounds are used as anti-parasitic insecticidal and antihelmintic agents in humans and animals and compositions containing such compounds as the active ingredient thereof are also disclosed. 5177308 INSECTICIDAL TOXINS IN PLANTS Kenneth A Barton, Michael J Miller assigned to Agracetus Transgenic plants have been created which express an insect-specific toxin from a scorpion. The chimeric inheritable trait produced conditions of toxicity in the plant cells of toxicity to certain insects upon ingestion of plant tissues. The inheritable trait has also been cross-bred to plants transgenic to the Bacillus thuringiensis delta-endotoxin to produce plants having two independent insect-specific toxin traits. Insect feeding trails revealed additive toxic effects. A generalized approach for developing other insecticidal toxins as candidates for insertion into transgenic plants is also presented.
PATENT ABSTRACTS
5171686 USE OF NATIVE ASPERGILLUS FLAVUS STRAINS TO PREVENT AFLATOXIN CONTAMINATION Peter Cotty assigned to The United States of America as represented by the United States Department of Agriculture Methods and compositions are provided for the control or prevention of aflatoxin contamination of agricultural commodities. Non-toxigenic strains of Asperglllus flavus are shown to inhibit aflatoxin production by toxigenic strains. Additionally, the non-toxigenic strains produce a factor in culture that alone inhibits aflatoxin production by toxigenic strains.
CHITINASES THEREOF
5177063 AVERMECTIN COMPOUNDS WITH A 6,5-SPIROKETAL RING SYSTEM Peter T Meinke assigned to Merck & Co lnc
5173419 PURIFIED
Disclosed herein is a process for breeding a glabrous variety of rice crop, this process comprising the steps of culturing tissues from a target rice plant, culturing the calli formed to a regeneration medium, growing the regenerates and selecting glabrous plants therefrom them, a new and distinct variety of a glabrous variety of a rice plant obtained by this process, and a process for the production of a glabrous plant which comprises further reproducing the plants. This glabrous variety is useful for rice cultivation.
AND USE
Gary E Harman, Roxanne Broadway, Arne Tronsmo, Matteo Lorito assigned to Cornell Research Foundation Inc Two chitinases from Trichoderma harzianum P1 (ATCC 74058) show chitin-containingfungus- and insect-inhibiting activity. The first is an endochitinase having a molecular weight of 36 kDa and an isoelectric point of 5.3+/-0.2. The second is an exochitinase having a molecular weight of 36 kDa an an isoelectric point of 4.4 +/-0.2. The chitinases can be applied in contact with chitin-containing fungus or insect as an inhibitor thereof. The chitinases can be applied to plants or to soil around plants which need production from a chitinase-containing pest. The chitinases can also be used to isolate genes coding for them which can be inserted into a genome of a plant needing protection from a chitinase-containing pest or into the genome of a microorganism to provide transgenic microorganism useful to produce enzyme or as a biocontrol agent. 5173423 PROCESS FOR BREEDING A GLABROUS VARIETY OF RICE CROP AND A GLABROUS PLANT Akir Nishikawa, Toshiya Yamamoto, Seiichi Tuji, Hirochika Sakano, Hideo Hirohara, Sanda, Japan assigned to Sumitomo Chemical Company Limited
Avermectin analogs are disclosed wherein the 6,6-spiroketal ring system has been reduced in size to a 6,5-spiroketal ring system by the deletion of the 25-position carbon atom and the 25alkyl substituent. This is accomplished by opening the outer spiroketal ring with the elimination of ring carbon atoms 23, 24 and 25 and the alkyl substituent at the 25-position and incorporation a new component, reclosing the spiroketal to a 5-membered ring with new substituents at the 24-position. The compounds are used as anti-parasitic insecticidal and antihelmintic agents in humans and animals and compositions containing such compounds as the active ingredient thereof are also disclosed. 5177308 INSECTICIDAL TOXINS IN PLANTS Kenneth A Barton, Michael J Miller assigned to Agracetus Transgenic plants have been created which express an insect-specific toxin from a scorpion. The chimeric inheritable trait produced conditions of toxicity in the plant cells of toxicity to certain insects upon ingestion of plant tissues. The inheritable trait has also been cross-bred to plants transgenic to the Bacillus thuringiensis delta-endotoxin to produce plants having two independent insect-specific toxin traits. Insect feeding trails revealed additive toxic effects. A generalized approach for developing other insecticidal toxins as candidates for insertion into transgenic plants is also presented.