Effect of Temperature on Phytochrome-mediated Responses in Seedlings of Mustard

摘要: Anthocyanin synthesis, hair formation, and the synthesis of ascorbic acid oxidase are all phytochrome-mediated reactions occurring in hypocotyl mustard (Sinapis alba L.). An investigation was conducted into effects temperature on light promotion these three photoresponses. When given prior to a exposure there either no difference between 20 30 C treatment, or treatment resulted greater photoresponse. subsequent far more effective promoting responses than treatment. These results accordance with known low delaying phytochrome-far red absorbing form (Pfr) destruction, thus resulting Pfr being available promote responses. The treatments greatest following short exposure, much smaller long exposure. as intermittent illumination less when same amount continuous illumination.