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    • 3. 发明申请
    • MODULATION OF CYTOKININ ACTIVITY IN PLANTS
    • 植物中细胞因子活性的调节
    • WO2004090143A2
    • 2004-10-21
    • PCT/US2004/010064
    • 2004-04-02
    • PIONEER HI-BRED INTERNATIONAL, INC.HABBEN, Jeffrey, E.ZINSELMEIER, ChrisTOMES, Dwight, T.ABBITT, Shane, E.HELENTJARIS, Timothy, G.NIU, Xiaomu
    • HABBEN, Jeffrey, E.ZINSELMEIER, ChrisTOMES, Dwight, T.ABBITT, Shane, E.HELENTJARIS, Timothy, G.NIU, Xiaomu
    • C12N15/82
    • C12N9/0032C12N9/1085C12N15/8234C12N15/8261Y02A40/146
    • This invention relates generally to the field of plant molecular biology. More specifically, this invention relates to methods and reagents for the temporally- and/or spatially-regulated expression of genes that affect metabolically effective levels of cytokinins in plants, particularly in plant seeds and related female reproductive tissue. This invention further relates to transgenic plants having enhanced levels of cytokinin expression wherein the transgenic plant exhibits useful characteristics, such as improved seed size, decreased tip kernel abortion, increased seed set during unfavorable environmental conditions, or stability of yield. The present invention also provides compositions and methods for regulating expression of heterologous nucleotide sequences in a plant. Compositions comprise novel nucleotide sequences for seed-preferred promoters known as eep1 and eep2 . A method for expressing a heterologous nucleotide sequence in a plant using the promoter sequences disclosed herein is provided. The method comprises transforming a plant cell to comprise a heterologous nucleotide sequence operably linked to one of the promoters of the present invention and regenerating a stably transformed plant from the transformed plant cell.
    • 本发明一般涉及植物分子生物学领域。 更具体地说,本发明涉及影响植物中特别是植物种子和相关雌性生殖组织中细胞分裂素的代谢有效水平的基因的时间和/或空间调节表达的方法和试剂。 本发明进一步涉及具有增强的细胞分裂素表达水平的转基因植物,其中转基因植物表现出有用的特征,例如改善的种子大小,降低的末梢核仁流产,在不利的环境条件下增加的种子集合或产量的稳定性。 本发明还提供用于调节植物中异源核苷酸序列表达的组合物和方法。 组合物包含已知为eep1和eep2的种子优选启动子的新型核苷酸序列。 提供了使用本文公开的启动子序列在植物中表达异源核苷酸序列的方法。 该方法包括转化植物细胞以包含与本发明的启动子之一可操作地连接的异源核苷酸序列,并从转化的植物细胞再生稳定转化的植物。
    • 9. 发明申请
    • TRANSGENIC CEREAL PLANTS
    • 转基因谷物植物
    • WO1996004392A2
    • 1996-02-15
    • PCT/US1995008977
    • 1995-07-26
    • PIONEER HI-BRED INTERNATIONAL, INC.
    • PIONEER HI-BRED INTERNATIONAL, INC.BOWEN, Benjamin, A.LOWE, KeithROSS, Margot, C.SANDAHL, Gary, A.TOMES, Dwight, T.SONGSTAD, David, D.GORDON-KAMM, William, J.
    • C12N15/82
    • C12N15/8207
    • To obtain a transgenic cereal plant which is stably transformed, an exposed cereal meristem is subjected to biolistic bombardment in order to target non-differentiated meristem cells for transformation. Immature embryos at the early proembryo, mid proembryo, late proembryo, transitional or early coleoptilar stage are harvested for biolistic bombardment. The meristem tissue or cells fated to contribute to the meristem then are manipulated in order to enlarge transgenic sectors, either through selection and/or through effecting a proliferation from the tissue of shoots or multiple meristems per se. The shoot population thus obtained then is screened, by means of a nonlethal enrichment assay, to identify either chimeric sectors that will contribute to germline transmission, or non-sectored, L2 periclinal chimeras that will by definition transmit to progeny. Increased time in culture, under selection, enhances the prospects for sectoral-to-periclinal conversions, and also selects for L1-to-L2 conversions which, through a shift in position, ultimately contribute to the germline. Transgenic sectors also are stabilized during the step of tillering.
    • 为了获得稳定转化的转基因谷物植物,将暴露的谷物分生组织进行生物射弹轰击,以靶向未分化的分生组织转化。 收获早期胚胎,中胚胎,晚期胚胎,过渡期或早期胚胎发育阶段的未成熟胚胎进行生物射弹轰击。 为了通过选择和/或通过实现来自组织或多个分生组织本身的增殖来扩大转基因部分,操纵分生组织或细胞,以促成分生组织。 然后通过非致死浓缩测定筛选由此获得的芽种群,以鉴定将有助于种系传播的嵌合区段或将通过定义向子代传播的非分区的L2周边嵌合体。 增加的文化时间在不断的选择下,增加了部门间的转化前景,并选择了L1到L2的转换,通过转变,最终有助于种系。 转基因部门在分蘖期间也稳定下来。
    • 10. 发明申请
    • MANIPULATION OF PLANT POLYSACCHARIDE SYNTHASES
    • 植物多糖的合成操作
    • WO2003026389A2
    • 2003-04-03
    • PCT/US2002/030796
    • 2002-09-27
    • PIONEER HI-BRED INTERNATIONAL, INC.
    • DHUGGA, Kanwarpal, S.TOMES, Dwight, T.
    • A01H
    • C12N9/1059C12N15/8246
    • The present invention provides compositions and methods for manipulation of plant polysaccharides and plant polysaccharide synthases. Compositions include novel nucleotide sequences encoding polysaccharide synthases polypeptides. and biologically active variants thereof. Further provided are methods for polysaccharide manipulation using the sequences disclosed herein. One method comprises stably incorporating into the genome of a plant cell. a nucleotide sequence of the present invention operably linked to a heterologous promoter and regenerating a stably transformed plant that expresses the nucleotide sequence. Methods for enhancing digestibility of plants. improving gum extractability from plants. and altering plant growth are also provided.
    • 本发明提供了用于操作植物多糖和植物多糖合酶的组合物和方法。 组合物包括编码多糖合酶多肽的新型核苷酸序列。 和其生物活性变体。 进一步提供了使用本文公开的序列进行多糖操作的方法。 一种方法包括稳定掺入植物细胞的基因组。 本发明的核苷酸序列可操作地连接到异源启动子并再生表达核苷酸序列的稳定转化的植物。 提高植物消化率的方法。 改善植物的树胶提取能力。 并改变植物生长。