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|Section2= |Section3= }} Phaseic acid is a terpenoid catabolite of abscisic acid. Like abscisic acid, it is a plant hormone associated with photosynthesis arrest〔Sharkey, T.D. "Effects of Phaseic Acid and Dihydrophaseic Acid on Stomata and the Photosynthetic Apparatus". Plant Physiol. 65(2): 291--297.〕 and abscission. ==Function== Abscisic acid (ABA) is a multifunctional plant hormone, playing roles in germination, seasonal growth patterns, and stress response. ABA levels are believed to be regulated in part by control of ABA catabolism, specifically by oxidation to form phaseic acid.〔Milborrow BV. (1969). "Identification of 'Metabolite C' from abscisic acid and a new structure for phaseic acid". Chem Commun 966-967.〕 Phaseic acid can therefore be thought of as a degradation product of ABA, although it may have other functions. The introduction of high phaseic acid concentrations have been found to impede stomatal closure and reduce photosynthesis in arabidopsis〔 but this may be a result of product inhibition rather than recognition of phaseic acid by a receptor. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phaseic acid」の詳細全文を読む スポンサード リンク
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