摘要:
BIS-(TETRAHALOETHYL) TRISULFIDES AND BIS-(TRIHALOVINYL) TRISULFIDES. THESE TRISULFIDES ARE PREPARED BY REACTING TETRAHALOETHYLSULFENYL CHLORIDE OR TRIHALOVINYLSULFENYL CHLORIDE, RESPECTIVELY, WITH HYDROGEN SULFIDE. THE TETRAHALOETHYL COMPOUNDS ARE USEFUL AS SEED DISINFECTANTS; WHEREAS THE TRIHALOVINYL MATERIALS ARE ALGICIDAL.
摘要:
Transformed microalgae capable of expressing glycosylated polypeptides and methods for producing said transformed microalgae and producing glycosylated polypeptides.
摘要:
The present invention relates to a new method for pest control and/or for preventing or treating pest infestation. Said method comprises the inoculation of plants, parts of plants or the surrounding of said plants with an effective amount of endophytic Beauveria bassiana strains. In a further aspect the present invention relates to the use of an isolated Beauveria bassiana strain having superior properties. Furthermore, biopesticides and compositions for pest control, in particular, for control of herbivorous insects and/or plant pathogens, are provided.
摘要:
The present invention relates to isolated polypeptides having xylanase activity and isolated polynucleotides encoding the polypeptides. The invention also relates to nucleic acid constructs, vectors, and host cells comprising the polynucleotides as well as methods of producing and using the polypeptides.
摘要:
In one aspect, a method is provided for producing stratified cotyledonary conifer somatic embryos. The method comprises (a) incubating a culture comprising immature conifer somatic embryos in a culture vessel comprising a development medium having an osmolality in the range of from 300 mM/Kg to 450 mM/Kg at a temperature of from 22° C. to 25° C. for a first incubation period sufficient in length for at least a portion of the embryos to reach anatomical maturity; and (b) subjecting the embryos in the culture vessel in accordance with step (a) to a temperature of from 0° C. to 10° C. for a second incubation period of at least one week to produce stratified cotyledonary somatic embryos.
摘要:
Non-leguminous crops, e.g. wheat, maize and rice, do not form nodules and are dependant for their nutrition on fixed nitrogen from the soil, or from chemical/nitrogenous fertilizers. The present invention provides non-leguminous plants and leguminous plants, including legumes that fail to nodulate with Rhizobia, with bacteria that enable them to fix nitrogen endophytically. Therefore, the plants contain nitrogen fixing bacteria the bacteria being located intracellularly in living plant cells.
摘要:
Sorghum is considered to be an allelopathic crop species, producing phytotoxins such as the lipid benzoquinone sorgoleone (2-hydroxy-5-methoxy-3-[(Z,Z)-8′,11′,14′-pentadecatriene]-p-benzoquinone) which likely accounts for much of its allelopathic properties. Prior investigations into the biosynthesis of sorgoleone have suggested the participation of one or more alkylresorcinol synthases (ARS), which are type III polyketide synthases (PKS) that produce 5-alkylresorcinols using medium to long-chain fatty acyl-CoA starter units via iterative condensations with malonyl-CoA. Current evidence suggests that sorgoleone biosynthesis occurs exclusively in root hair cells, involving the synthesis of a 5-pentadecatrienyl resorcinol intermediate derived from an unusual 16:3 fatty acyl-CoA starter unit. To characterize the enzymes responsible for the biosynthesis of this alkylresorcinol intermediate, a previously-described expressed sequence tag (EST) database prepared from isolated root hairs was first mined for all PKS-like sequences. Quantitative real-time RT-PCR analyses revealed that two of these sequences were preferentially expressed in root hairs, and recombinant enzyme studies demonstrated that both sequences (designated ARS1 and ARS2) encode ARS enzymes capable of accepting a variety of fatty acyl-CoA starter units. Furthermore, RNA interference (RNAi) experiments directed against ARS1 and ARS2 resulted in the generation of multiple independent transformant events exhibiting dramatically reduced sorgoleone levels. Thus, both ARS1 and ARS2 are likely to participate in the biosynthesis of sorgoleone in planta. The sequences of ARS1 and ARS2 were also used to identify several rice genes encoding ARSs, which are likely involved in the production of defense-related alkylresorcinols.
摘要:
Nucleic acid molecules are described which encode polypeptides having the enzymatic activity of a fructosyltransferase. Also, vectors, host cells and transgenic plants are described which contain such nucleic acid molecules. Furthermore, processes for producing polyfructose, particularly that of the inulin type, using the hosts described and/or the fructosyltransferase produced by them are described.
摘要:
A selection method for barley lipoxygenase-1 deficient barley, comprising a step of distinguishing the barley lipoxygenase-1 deficient barley by whether or not the guanine at the splicing donor site of the 5th intron of the barley lipoxygenase-1 gene is mutated to a different base; and a method for production of malt alcoholic beverages using a material for malt alcoholic beverages derived from barley obtained by the selection method.
摘要:
This invention pertains to nucleic acid fragments encoding plant proteins that are homologs to the cis-prenyltransferases UPP synthase from the bacterium Micrococcus luteus or Dedol-PP synthase from yeast Saccharomyces cerevisiae. More specifically, this invention pertains to cis-prenyltransferase homologs from wheat, grape, soybean, rice, African daisy, rubber tree latex and pot marigold.