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  • Title: Fairy Chemicals, 2-Azahypoxanthine and 2-Aza-8-oxohypoxanthine, Regulate Carotenoid Accumulation in Citrus Juice Sacs in Vitro.
    Author: Ma G, Zhang L, Yamawaki K, Yahata M, Choi JH, Kawagishi H, Kato M.
    Journal: J Agric Food Chem; 2015 Aug 19; 63(32):7230-5. PubMed ID: 26208741.
    Abstract:
    "Fairy chemicals", 2-azahypoxanthine (AHX) and 2-aza-8-oxohypoxanthine (AOH), are two novel plant-growth regulating compounds isolated from a fairy ring forming fungus, Lepista sordida. In the present study, the effects of AHX and AOH on the accumulation of carotenoids and expression of genes related to carotenoid metabolism were investigated in the juice sacs of Satsuma mandarin (Citrus unshiu Marc.) in vitro. The results showed that AHX and AOH regulated carotenoid metabolism in the citrus juice sacs. Carotenoid accumulation was induced by AHX in the second week and by AOH in the fourth week. In the meanwhile, the modification of carotenoid accumulation by the AHX and AOH treatments was highly regulated at the transcriptional level. The results presented herein provide new information on the functions of AHX and AOH in plants and contribute to elucidating the mechanisms by which AHX and AOH stimulate plant growth.
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