Abstract: Disclosed in the present invention is an effect of flavonoid glycoside in the resistance of rice to weeds. Provided in the present invention is the use of isoorientin in any one of the following: inhibiting the growth of weeds; regulating the allelopathy of plants; and regulating the resistance of plants to weeds. The results of the present invention show that isoorientin can regulate the allelopathy of plants and can be used for inhibiting the growth of weeds. The present invention is of great significance for developing an environment-friendly green pesticide, and provides theoretical guidance for controlling weeds in rice fields.

Abstract: The present invention discloses the use of a flavonoid glycoside and glycosyltransferase gene thereof in regulating plant resistance to weeds. The present invention provides the use of tricin-5-O-glucopyranoside in any one of the following: regulating plant allelopathy; regulating plant resistance to weeds; inhibiting the growth of weeds, and the use of Os07g0503900 protein or related biological materials thereof in any one of the following: regulating plant allelopathy; regulating plant resistance to weeds; regulating the content of tricin-5-O-glucopyranoside in plants; catalyzing the glycosylation of tricin to generate tricin-5-O-glucopyranoside; act as or preparing glycosylation transferase; inhibiting the growth of weeds. The present invention is of great significance for developing environment-friendly green pesticides, cultivating rice varieties with high allelopathy and regulating the biosynthesis of tricin-5-O-glucopyranoside, and provides theoretical guidance for the control of weeds in paddy fields.

Abstract: The present invention relates to a method for preparing fertility-lowered plant. The present invention provides an RNA interference vector and a method for obtaining a transgenic plant by introducing said RNA interference vector into a target plant; said transgenic plant is the following 1) or 2): 1) Sterile transgenic plant or 2) The fertility of said transgenic plant is lower than said target plant; the present invention also provides a method for cultivating a target plant to a sterile mutant or fertility-lowered mutant by sodium azide mutagenesis. The experiments of the present invention proved that the present invention provides various methods for preparing sterile lines or fertility-lowered lines; including RNA interference or TILLING (Targeting Induced Local Lesions IN Genomes) technology selection; sterile lines prepared by the methods of the present invention establish the basis of rice heterosis and crossbreeding.

Abstract: This invention relates to isolated polynucleotides encoding a CYP51H. The invention also relates to the construction of recombinant DNA constructs comprising all or a portion of the isolated polynucleotide of the invention, in sense or antisense orientation, operably linked to at least one regulatory sequence.

Abstract: This invention relates to isolated polynucleotides encoding enzymes consisting of a carboxypeptidase-like protein, a methyltransferase and a glucosyltransferase, involved in the biosynthesis of ?-amyrin-derived triterpenes in plants and seeds. The invention also relates to the construction of recombinant DNA constructs comprising all or a portion of the isolated polynucleotides of the invention, in sense or antisense orientation, operably linked to at least one regulatory sequence.

Abstract: This invention relates to isolated polynucleotides encoding enzymes consisting of a carboxypeptidase-like protein, a methyltransferase and a glucosyltransferase, involved in the biosynthesis of ?-amyrin-derived triterpenes in plants and seeds. The invention also relates to the construction of recombinant DNA constructs comprising all or a portion of the isolated polynucleotides of the invention, in sense or antisense orientation, operably linked to at least one regulatory sequence.

Abstract: This invention relates to isolated polynucleotides encoding enzymes consisting of a carboxypeptidase-like protein, a methyltransferase and a glucosyltransferase, involved in the biosynthesis of ?-amyrin-derived triterpenes in plants and seeds. The invention also relates to the construction of recombinant DNA constructs comprising all or a portion of the isolated polynucleotides of the invention, in sense or antisense orientation, operably linked to at least one regulatory sequence.

Abstract: Promoters and genes involved in avenacin production in oats are cloned and characterized. Promoters for oxidosqualene cyclase and a cytochrome P450 are shown to be useful in root-specific expression of genes operatively linked to these promoters when introduced into plants. Sequences operably linked to the promoters are expressed in root epidermal cells.

Abstract: This invention relates to isolated polynucleotides encoding enzymes consisting of a carboxypeptidase-like protein, a methyltransferase and a glucosyltransferase, involved in the biosynthesis of ?-amyrin-derived triterpenes in plants and seeds. The invention also relates to the construction of recombinant DNA constructs comprising all or a portion of the isolated polynucleotides of the invention, in sense or antisense orientation, operably linked to at least one regulatory sequence.

Abstract: This invention relates to isolated polynucleotides encoding a CYP51H. The invention also relates to the construction of recombinant DNA constructs comprising all or a portion of the isolated polynucleotide of the invention, in sense or antisense orientation, operably linked to at least one regulatory sequence.

Abstract: Promoters and genes involved in avenacin production in oats are cloned, characterized and shown to be useful in root-specific expression of genes operatively linked to these promoters when introduced into plants.

Abstract: This invention relates to isolated polynucleotides encoding a CYP51H. The invention also relates to the construction of recombinant DNA constructs comprising all or a portion of the isolated polynucleotide of the invention, in sense or antisense orientation, operably linked to at least one regulatory sequence.

Abstract: This invention relates to isolated polynucleotides encoding a CYP51H. The invention also relates to the construction of recombinant DNA constructs comprising all or a portion of the isolated polynucleotide of the invention, in sense or antisense orientation, operably linked to at least one regulatory sequence.