Stress-Induced Factor Involved in Flower Formation of Lemna is an -Ketol Derivative of Linolenic Acid
| Autor: | Mineyuki Yokoyama, Michihiro Yamaguchi, Atsushi Takimoto, Shoko Yamaguchi, Kazuo Komatsu, Yoshihiro Yokokawa, Shinji Inomata, Sumiko Kaihara, Toshii Iida, Seiichi Yoshida |
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| Rok vydání: | 2000 |
| Předmět: |
Hot Temperature
Physiology Linolenic acid Stereochemistry Chemical structure Plant Science Biology Magnoliopsida Norepinephrine Structure-Activity Relationship chemistry.chemical_compound Osmotic Pressure Structure–activity relationship chemistry.chemical_classification Lemna Jasmonic acid Water alpha-Linolenic Acid Cell Biology General Medicine biology.organism_classification Enzyme Biochemistry chemistry Octadecadienoic Acid Fatty Acids Unsaturated Plant Structures Flower formation |
| Zdroj: | Plant and Cell Physiology. 41:110-113 |
| ISSN: | 1471-9053 0032-0781 |
| Popis: | A stress-induced substance(s) (factor C) incubated with norepinephrine (NE) has strong flower-inducing activity in Lemna paucicostata. We isolated an essential component (FIF) of factor C, and clarified its chemical structure as 9-hydroxy-10-oxo-12(Z),15(Z)-octadecadienoic acid, an alpha-ketol derivative of linolenic acid, which is formed via 9-hydroperoxy linolenic acid. Synthesized FIF showed flower-inducing activity after incubation with NE (factor C activity) equivalent to that formed in the stressed Lemna. Jasmonic acid and 13-hydroxy-12-oxo-9(Z),15(Z)-octadecadienoic acid (12,13-alpha-ketol linolenic acid), both of which are formed via 13-hydroperoxide of linolenic acid and all other derivatives of FIF synthesized by chemical and enzymatic processes failed to show the factor C activity. These results suggest that the molecular structure of FIF is very specific for the factor C activity. |
| Databáze: | OpenAIRE |
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