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    • 5. 发明授权
    • Genetic manipulation of isoflavonoids
    • 异黄酮的遗传操作
    • US07038113B1
    • 2006-05-02
    • US09936190
    • 2000-03-08
    • Richard A. DixonChristopher L. Steele
    • Richard A. DixonChristopher L. Steele
    • C12N15/29C12N15/63C12N15/82A01H5/00A01H5/10
    • C12N9/0077C12N15/8243C12N15/825C12N15/8261Y02A40/146
    • Soybean and Medicago truncatula CYP93C genes have been isolated which encode a cytochrome P450 that can catalyze the aryl migration of a flavanone to yield an isoflavanone intermediate or an isoflavone. Plants can now be genetically engineered to produce isoflavones that provide potential human health benefits and increase disease resistance in plants. Isoflavones can now be produced in transgenic plants species in which isoflavones do not naturally occur, i.e., in species other than legumes. Alternatively, introducing infection-inducible isoflavonoid biosynthesis into non-legumes qualitatively complements these plants phytoalexin defenses against microbial pathogens, whereas over-expression of the isoflavonoid pathway in legumes quantitatively increases this defense response. Finally, modifying the extend of production of isoflavonoids in legume roots positively impacts nodulation efficiency and therefore plant yield.
    • 已经分离出大豆和苜蓿Truncatula CYP93C基因,其编码细胞色素P450,其可以催化黄烷酮的芳基迁移以产生异黄酮中间体或异黄酮。 植物现在可以进行基因工程,以生产提供潜在的人类健康益处并增加植物抗病性的异黄酮。 异黄酮现在可以在其中不是天然存在异黄酮的转基因植物物种中生产,即在除豆类之外的物种中。 或者,将感染诱导型异黄酮生物合成引入非豆科植物定性补充这些植物对微生物病原体的植物抗毒素抗性,而豆类中异黄酮途径的过表达量则定量增加了这种防御反应。 最后,修改豆科植物中异黄酮生产的延伸对结瘤效率和植株产量产生积极影响。