摘要:
Coated meristematic tissue comprising a dry or dryable meristematic tissue (1) and solid support (3) in contact with said tissue and partially covering it, in such a manner that the tissue remains in contact with a volume of air (2). The support is capable of absorbing a nutrient medium and germinating. The invention is suitable for seeding or culturing purposes.
摘要:
This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stable transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.
摘要:
A method for encouraging plant cell differentiation in culture conditions, particularly for tissular differentiation, embryogenesis, and/or organogenesis, is characterized in that an adequate concentration of at least one proteolytic enzyme is introduced into the culture medium for cell differentiation.
摘要:
DNA sequences are disclosed that code for a middle chain-specific acyl-[ACP]-thioesterase, as well as alleles and derivatives of said DNA sequence. This DNA may be used to transform plants capable of forming middle chain-specific acyl-[ACP]-thioesterases.
摘要:
Coated meristematic tissue comprising a dry or dryable meristematic tissue (1) and solid support (3) in contact with said tissue and partially covering it, in such a manner that the tissue remains in contact with a volume of air (2). The support is capable of absorbing a nutrient medium and germinating. The invention is suitable for seeding or culturing purposes.
摘要:
Whole scutella are isolated from immature zygotic embryos of cereal plants and cultured, in the absence of the zygotic embryo axis, to produce somatic embryos, which in turn are converted into plantlets. The scutellar cells optionally are transformed with foreign DNA so that at least some of the resulting plantlets are transgenic. The regeneration is much more efficient and rapid than with conventional methods.
摘要:
The present invention provides methods of inducing somatic embryogenesis in tissue cultures derived from varieties of Taxus. In addition, the present invention provides methods of obtaining taxol, or precursors thereof, using in vitro propagated somatic embryo tissues.
摘要:
Method of and composition for treating vegetation to improve its growth or yield of a crop. The composition comprises a carbon skeleton/energy component, such as for example molasses, a macronutrient component and a micronutrient component, preferably also a vitamin/cofactor component and an enhancement component. The composition is usually in the form of an aqueous solution. It may be applied as a foliar spray or in other ways; it is preferably applied in increments; and it makes use of the natural ability of vegetation to harvest solar energy and other sources of energy and carbon skeleton. Where applied to pollen, anthers (18) may be dried in revolving tubes (10), then crushed and separated from debris on a shake table (25).
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung genetisch identischer Pflanzen der Gattung Silybum , das dadurch gekennzeichnet ist, daß man aus einer Donorpflanze definierten Genotyps Protoplasten herstellt, und anschließend aus den Protoplasten genetisch identische Pflanzen der Gattung Silybum regeneriert. Gegenstand der Erfindung sind außerdem die mit Hilfe dieses Verfahrens erhältlichen Protoplasten.
摘要:
The invention relates to improved transformation and regeneration of alfalfa, Medicago sativa . A method is used to transform alfalfa by using particle acceleration. Optimum results with mature cotyledons occurs when bombarding after 24 to 120 hours of imbibing water. Regeneration and transformation of alfalfa is greatly improved by using immature cotyledons or embryos of immature cotyledons for transformation and regeneration Immature cotyledons include those up to about 25 days past pollination, and preferably include cotyledons excised at 10-15 days past pollination, most preferably including those excised at about 10 days past pollination. These cotyledons have a light green to translucent appearance. Plants resulting from bombardment of somatic embryos of immature cotyledons retain regeneration ability.