Polyphenol-content-increasing agent for plant
View Patent ↗To provide a polyphenol-content-increasing agent which increases the content of polyphenol in a plant. A polyphenol-content-increasing agent for plant, containing, as an active ingredient, a 5-aminolevulinic acid or a derivative thereof represented by the following formula (1): (Chem 1) R 2 R 1 NCH 2 COCH 2 CH 2 COR 3 (1) wherein R 1 and R 2 each independently represents a hydrogen atom, an alkyl group, an acyl group, an alkoxycarbonyl group, an aryl group, or an aralkyl group; R 3 represents a hydroxyl group, an alkoxy group which may have a substituent, an acyloxy group, an alkoxycarbonyloxy group, an aryloxy group, an aralkyloxy group, or an amino group, or a salt thereof.
1. A method for increasing the content of polyphenol in a plant, which comprises treating said plant with an effective amount of a 5-aminolevulinic acid or a derivative thereof represented by the following formula (1):
R 2 R 1 NCH 2 COCH 2 CH 2 COR 3 (1)
wherein R 1 and R 2 each independently represents a hydrogen atom, an alkyl group, an acyl group, an alkoxycarbonyl group, an aryl group, or an aralkyl group; R 3 represents a hydroxyl group, an alkoxy group which may have a substituent, an acyloxy group, an alkoxycarbonyloxy group, an aryloxy group, an aralkyloxy group, or an amino group, or a salt thereof,
wherein the plant is selected from the group consisting of peppers, pear, and, parsley.
2. The method for increasing the content of polyphenol in a plant according to claim 1 , wherein the polyphenol is phenylcarboxylic acid-based, lignan-based, curcumin-based, coumarin-based, or flavonoid-based.
3. The method for increasing the content of polyphenol in a plant according to claim 2 , wherein the phenylcarboxylic acid-based polyphenol is chlorogenic acid, caffeic acid, or ferulic acid.
4. The method for increasing the content of polyphenol in a plant according to claim 2 , wherein the flavonoid-based polyphenol is apigenin, rutin, luteolin, quercetin, kaempferol, isorhamnnetin, or hesperetin.
5. The method for increasing the content of polyphenol in a plant according to any one of claim 1 , 3 or 4 , wherein 5-aminolevulinic acid or a derivative thereof is absorbed from leafs, stems, or roots.
6. The method for increasing the content of polyphenol in a plant according to claim 2 , wherein 5-aminolevulinic acid or a derivative thereof is absorbed from leafs, stems, or roots.