Plant having improved tolerance to various environmental...

A - Human Necessities – 01 – H

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A01H 5/00 (2006.01) C12N 1/15 (2006.01) C12N 1/19 (2006.01) C12N 1/21 (2006.01) C12N 5/10 (2006.01) C12N 9/10 (2006.01) C12N 9/88 (2006.01) C12N 15/60 (2006.01) C12N 15/82 (2006.01)

Patent

CA 2423041

An isolated plant-origin polyamine metabolism-relating enzyme gene characterized by showing a change in expression dose upon environmental stresses in the polyamine metabolism in a plant; an antisense DNA or an antisense RNA to this gene; a plant having improved environmental stress- tolerance which carries the above gene in a stable state and its offspring; a method of constructing the plant; a method of constructing a callus of the plant; a method of selecting a transgenic plant showing excellent growth compared with plants free from an exogenous polyamine metabolism-relating gene; and a microorganism and a plant which are transformed by the above gene.

Cette invention se rapporte à un gène d'enzyme relatif au métabolisme de la polyamine d'origine végétale, isolé, ce caractérisant en ce qu'il présente, dans le métabolisme de la polyamine de la plante, une modification de la dose d'expression, lorsqu'il est soumis à des contraintes environnementales; à un ADN antisens ou un ARN antisens de ce gène; à une plante ayant une meilleure tolérance aux contraintes environnementales et portant ce gène à l'état stable et sa descendance; à un procédé pour produire cette plante; à un procédé pour produire un cal de cette plante; à un procédé de sélection d'une plante transgénique présentant une excellente croissance par rapport aux plantes exemptes d'un gène relatif au métabolisme de la polyamine exogène; et à un micro-organisme et une plante qui sont transformés par ledit gène.

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