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Plant growth regulator and use thereof 実績あり

外国特許コード F110003329
整理番号 A181-19WO
掲載日 2011年6月22日
出願国 アメリカ合衆国
出願番号 51858107
公報番号 20100016166
公報番号 8999888
出願日 平成19年12月10日(2007.12.10)
公報発行日 平成22年1月21日(2010.1.21)
公報発行日 平成27年4月7日(2015.4.7)
国際出願番号 JP2007073795
国際公開番号 WO2008072602
国際出願日 平成19年12月10日(2007.12.10)
国際公開日 平成20年6月19日(2008.6.19)
優先権データ
  • 特願2006-333635 (2006.12.11) JP
  • 2007JP073795 (2007.12.10) WO
発明の名称 (英語) Plant growth regulator and use thereof 実績あり
発明の概要(英語) A plant growth regulator containing glutathione allows increasing harvest index.
This provides a technique for specifying a control factor for a plant, thereby effectively controlling germination, growth, anthesis etc. of the plant.
従来技術、競合技術の概要(英語) BACKGROUND ART
Conventionally, plants have been deeply involved with human as foods, ornaments, industrial materials such as paper and chemicals, and fuels.
Further, recently, plants have been spotlighted as biomass energy that will substitute fossil fuel.
Although plants have been used in such various fields, their mechanisms such as budding, growth, and anthesis have not yet been clarified in many regards.
Consequently, cultivation of plants has been mainly based on experiences and intuition, and harvest of the plants has been greatly influenced by natural conditions such as weather.
Therefore, clarification of plants' mechanisms such as budding, growth, and anthesis and regulating and controlling the mechanisms are very important not only for increasing yields of ornamental plants and food plants such as grains and vegetables, but also for growing woods in forests and biomass energy.
In order to regulate growth of plants, there have been made attempts such as regulation of anthesis by artificial environments such as a conservatory, and promotion of growth by use of chemicals such as ethylene.
However, most of these conventional attempts are regulations of growth of plants based on experiences and intuition, and are not based on data that allows scientific evaluation of growth of plants.
In view of the above, the inventors of the present invention have researched on the plants' mechanisms of budding, growth, and anthesis.
Consequently, the inventors have shown that reactive oxygen species (ROS) is essential not only as a substrate for biosynthesis but also as a factor for controlling growth of plants (see Patent Literature 1).
Specifically, Patent Literature 1 describes a regulator that contains a redox state regulation substance for cells and that regulates differentiation of cells or organs, a method for controlling differentiation and morphogenesis of a organism, and a organism thus obtained.
Further, Patent Literature 2 discloses an adjuvant for regulating growth of plants and a method for preparing redifferentiated plants by used of the adjuvant.
Specifically, a callus induced from a part of a plant such as rice and eustoma is cultivated in a redifferentiating culture medium containing glutathione, preferably oxidized glutathione (which may be hereinafter referred to as GSSG) so as to promote rhizogenesis, effectively obtaining a redifferentiated body from the callus in a short time.

CITATION LIST

Patent Literature 1
International Application Publication No. WO01/080638 (Publication Date: Jul. 22, 2003)

Patent Literature 2
Japanese Patent Application Publication, Tokukai, No. 2004-352679 A (Publication Date: Dec. 16, 2004)

特許請求の範囲(英語) [claim1]
1. A method for preparing a plant having increased harvest index compared to a harvest index of a wild type plant or untreated plant, comprising the steps of: applying oxidized glutathione to a plant, or to soil with which a plant is to be cultivated;
cultivating the plant,
wherein a total amount of the applied glutathione with which the plant is cultivated is in the range (i) between 2.5 mg and 1470 mg per one individual plant, or (ii) between 0.82 mg and 1800 mg per one liter of soil;
measuring an amount of harvest of the plant;
calculating a harvest index of the plant; and
wherein a plant having a harvest index that is higher than the harvest index of the wild type plant or untreated plant is thereby prepared.
[claim2]
2. The method as set forth in claim 1, wherein the glutathione is supplied intermittently.
[claim3]
3. The method as set forth in claim 1, wherein the glutathione is supplied at around a time of transition from vegetative to reproductive development.
[claim4]
4. The method as set forth in claim 1, wherein the amount of harvest is selected from the group consisting of a weight of harvest, number of harvest, and amount of biomass of harvest.
[claim5]
5. The method as set forth in claim 4, wherein the harvest is at least one selected from the group consisting of fruit, seeds, stems, roots, flowers and leaves.
[claim6]
6. The method as set forth in claim 1, wherein applying glutathione to the plant or to soil comprises applying the glutathione intermittently.
[claim7]
7. The method as set forth in claim 1, wherein applying glutathione to the plant or to soil comprises applying the glutathione at about a time the plant transitions from vegetative to reproductive development.
[claim8]
8. The method as set forth in claim 1, wherein applying glutathione to the plant or to soil comprises applying the glutathione at a time ranging from a time of transition from vegetative to reproductive development to about a time of bolting.
[claim9]
9. The method as set forth in claim 1, wherein the plant is a mutant or transformant plant.
[claim10]
10. The method as set forth in claim 9, wherein the plant is a transformant plant to which a gene for encoding glutathione-binding plastid-type fructose-1,6-bisphosphate aldolase (gFBA) is introduced.
[claim11]
11. A method for preparing a plant having an increased number of seeds and/or flowers compared to a number of seeds and/or flowers of a wild type plant or untreated plant, comprising the steps of: applying oxidized glutathione to a plant, or to soil with which a plant is to be cultivated;
cultivating the plant,
wherein a total amount of the applied glutathione with which the plant is cultivated is in the range (i) between 2.5 mg and 1470 mg per one individual plant, or (ii) between 0.82 mg and 1800 mg per one liter of soil;
measuring the number of seeds and/or the flowers of the plant; and
wherein a plant having a number of seeds and/or flowers that is higher than the number of seeds and/or flowers of the wild type plant or untreated plant is thereby prepared.
[claim12]
12. A method for preparing a plant having an increased number of lateral shoots and/or tillers compared to a number of lateral shoots and/or tillers of a wild type plant or untreated plant, comprising the steps of: applying oxidized glutathione to a plant, or to soil with which a plant is to be cultivated;
cultivating the plant,
wherein a total amount of the applied glutathione with which the plant is cultivated is in the range (i) between 2.5 mg and 1470 mg per one individual plant, or (ii) between 0.82 mg and 1800 mg per one liter of soil;
measuring the number of lateral shoots and/or tillers of the plant; and
wherein a plant having a number of lateral shoots and/or tillers that is higher than the number of lateral shoots and/or tillers of the wild type plant or untreated plant is thereby prepared.
[claim13]
13. The method as set forth in claim 12, wherein the plant has mutation in a function for synthesizing a plant hormone and/or a function for responding to a plant hormone.
[claim14]
14. The method as set forth in claim 13, wherein the plant hormone is gibberellin.
  • 発明者/出願人(英語)
  • OGAWA KENICHI
  • HENMI KENJI
  • OKAYAMA PREFECTURE
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 504/100
  • 504/335
参考情報 (研究プロジェクト等) CREST Plants Function and Their Control AREA
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