NOVEL BACTERIA AND METHOD FOR CONTROLLING PLANT DISEASE USING THE SAME

• US 20090155214A1
• Filed: 03/02/2007
• Published: 06/18/2009
• Est. Priority Date: 03/03/2006
• Status: Active Grant

• Current Assignee: Mayekawa Manufacturing Company Limited (Mayekawa Holding AG), Riken
• Original Assignee: Mayekawa Manufacturing Company Limited (Mayekawa Holding AG), Riken
• Inventors: Yasuda, Michiko, Nakashita, Hideo, Isawa, Tsuyoshi, Shinozaki, Satoshi, Kudo, Toshiaki
• Granted Patent: US 8,728,459 B2
• Time in Patent Office: Days
• US Class Current: 424/93.200
• CPC Class Codes: A01H 17/00 Symbiotic or parasitic combinations including one or more new plants, e.g. mycorrhiza lichens A01H15/00
• CPC Class Codes: A01N 63/20 Bacteria; Substances produced thereby or obtained therefrom
• CPC Class Codes: C12N 1/205 Bacterial isolates
• CPC Class Codes: C12R 2001/01 Bacteria or Actinomycetales ; using bacteria or Actinomycetales
• CPC Class Codes: Y02A 40/10 in agriculture

Abstract

An object of the present invention is to provide a means for imparting resistance against pathogenic fungal, pathogenic bacterial, or pathogenic viral disease to agriculturally useful plants. The present invention relates to a bacterium belonging to the genus Azospirillum or the genus Herbaspirillum capable of imparting resistance against pathogenic fungal, pathogenic bacterial, or pathogenic viral disease to a host plant by living symbiotically within the plant, a method for controlling plant disease using the bacteria, and plants produced by such method.

Claims

1. A method for controlling pathogenic fungal, pathogenic bacterial, or pathogenic viral disease in a plant, comprising a step of artificially infecting a plant with a bacterium belonging to the genus Azospirillum or the genus Herbaspirillum capable of imparting resistance against pathogenic fungal, pathogenic bacterial, or pathogenic viral disease to the host plant by living symbiotically within the plant.

2. The method according to claim 1, in which the bacterium is at least one member selected from the group consisting of a novel bacterium belonging to the genus Azospirillum (accession No. NITE BP-194), a novel bacterium belonging to the genus Herbaspirillum (accession No. NITE BP-193), and a bacterium of a mutant strain thereof.

3. The method according to claim 1, in which the plant belongs to the family Gramineae or the family Brassicaceae.

4. The method according to claim 1, in which the bacterium is caused to infect a plant during the vegetative stage.

5. A disease control agent for controlling pathogenic fungal, pathogenic bacterial, or pathogenic viral disease in a plant, containing as an active ingredient a bacterium belonging to the genus Azospirillum or the genus Herbaspirillum capable of imparting resistance against pathogenic fungal, pathogenic bacterial, or pathogenic viral disease to a host plant by living symbiotically within the plant.

6. The control agent according to claim 5, in which the bacterium is at least one member selected from the group consisting of a novel bacterium belonging to the genus Azospirillum (accession No. NITE BP-194), a novel bacterium belonging to the genus Herbaspirillum (accession No. NITE BP-193), and a bacterium of a mutant strain thereof.

7. A novel bacterial strain belonging to the genus Azospirillum (accession No. NITE BP-194) or a mutant strain thereof capable of imparting resistance against pathogenic fungal, pathogenic bacterial, or pathogenic viral disease to a host plant by living symbiotically within the plant.

8. A novel bacterial strain belonging to the genus Herbaspirillum (accession No. NITE BP-193) or a mutant strain thereof capable of imparting resistance against pathogenic fungal, pathogenic bacterial, or pathogenic viral disease to a host plant by living symbiotically within the plant.

9. A plant having resistance against pathogenic fungal, pathogenic bacterial, or pathogenic viral disease, which is artificially infected with at least one member selected from the group consisting of a novel bacterial strain belonging to the genus Azospirillum (accession No. NITE BP-194), a novel bacterial strain belonging to the genus Herbaspirillum (accession No. NITE BP-193), and a mutant strain thereof capable of imparting resistance against pathogenic fungal, pathogenic bacterial, or pathogenic viral disease to a host plant by living symbiotically within the plant.