Agriculture and Forestry Biotechnology

4931394 4935531

V I T R O P R O P A G A T I O N O F G R A P E V I A L E A F D I S K C U L T U R E

William Krul assigned to The Board of Gover- nors for Higher Education State of Rhode Island and Providence Plantations

Angiosperm nodes are cultured to develop plan- tlets. The plantlets are exposed to photoperiods of light and dark. Leaf tissue removed from the plantlets when cultured produces at least 20% embryos.

A N T I B I O T I C C O M P O U N D S

John B Ward, Hazel Noble, Neil Porter, Richard A Fletton, David Noble, Bushey, United King- dom assigned to American Cyanamid Company

Compounds as described having the partial for- mula See Patent for Chemical Structure These compounds may have a 5-OH or -OMe group and at the 25- position an isopropylene group substituted by methyl, ethyl or isopropyl. The compounds may be used in agriculture or medicine as antiparasitics, and may be prepared by culturing certain Streptomyces strains, in par- ticular Streptomyces thermoarchaensis NC1B 12015.

4935236

C O N T R O L O F E L M L E A F B E E T L E V I A C O N T A C T W I T H A

S T R A I N O F B A C I L L U S T H U R I N G I E N S I S

Corinna Herrnstadt, George G Soares assigned to Mycogen Corporation

The subject invention concerns a novel and use- ful insecticide with activity against elm leaf beetle. These pests do heavy damage to the crops. The insecticide of the subject invention is a B. thuringiensis microbe given the designation strain san diego. The spores or crystals of this microbe are useful to control the cotton boll weevil, the Colorado potato beetle, the alfalfa weevil, the corn rootworm, and elm leaf beetle.

4937970

IN V I T R O S C R E E N I N G F O R A N D S E L E C T I O N O F G L Y C I N E M A X R E S I S T A N T T O P H I A L O P H O R A

G R E G A T A

Yong-Quan Guan, Lynn E Gray, Jack M Wid- holm assigned to Lubrizol Genetics Inc; The Board of Trustees of the University of Illino

An in vitro method for screening Glycine max cells for resistance to a disease caused by Phialophora gregata, brown stem rot, is dis- closed. The method is useful for identifying brown stem rot resistant soybean varieties. Means for selecting mutant soybean cells for resistance to a toxin produced by P. gregata is

847

848 PATENT ABSTRACTS

also provided, as are cells and plants selected by this process. The invention involves culture of soybean calli in the presence of a filtrate of used fungal growth medium.

4938699

A P P A R A T U S F O R D E T E C T I N G E X C H A N G E S T H R O U G H T H E

C U T E N D O F A P L A N T B R A N C H

Serge Cassagne, 75013 Paris, France

Cut end (22) of an aquatic plant branch (18) is engaged in the mouth (21) of a gas release tube (19) which goes from a photosynthesis tank (2) containing branch (18). Tube (19) establishes a vessel (link 2) connecting photosynthesis tank (2) and a tank (4) in which a test tube (26) collects the release. Between the two tanks, the tube pas- ses through a compartment (3) for observation of the release. The apparatus has a transparent bottom (16) allowing it to be placed on the light table of an overhead projector to project the im- age of the experiment on a screen.

4940834

P L A N T S H A V I N G E N D O P H Y T I O F U N G U S E N H A N C E D

P E R F O R M A N C E A N D M E T H O D O F P R O D U C I N G S A M E

Richard Hurley, Cyril Funk assigned to Lofts Inc

A method for developing new varieties of plants which host an endophytic fungus, said fungus conferring enhanced performance on its plant host. The method comprises selecting a maternal parent which hosts an endophytic fungus capable of enhancing its host plant's perfor- mance. A paternal parent plant of the same or of a different variety as the maternal parent plant is selected. The selected maternal parent plant is then crossed with the selected paternal parent plant. The progeny of the cross which have the desired enhanced-performance characteristics are themselves selected. These progeny are then sexually or asexually propagated and the seed, vegetative propagules, or disseminules har- vested.