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Heme Oxygenase Involved in Gibberellic Acid-Induced α-Amylase Expression and Delays Gibberellic Acid-Induced Programmed Cell Death in Wheat Aleurone Layer

Author: WuMingZhu
Tutor: ShenWenZuo
School: Nanjing Agricultural College
Course: Biochemistry and Molecular Biology
Keywords: Wheat aleurone cells Blood red dioxygenase Hemin Carbon monoxide Gibberellin α-amylase
CLC: S512.1
Type: Master's thesis
Year: 2009
Downloads: 26
Quote: 0
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Abstract


Heme oxygenase (HO) is the rate-limiting enzyme in heme catabolism in animals . Recent studies have found that HO plays an important role in the plants . The findings in this article , gibberellin (gibberellic acide, GA) treatment alone or with the HO-1 inducer hemin ( hematin , Ht ) and CO aqueous solution combination process led to the wheat aleurone layer HO activity improved , while α - amylase gene expression and α- amylase activity was significantly affected by the induction ; pretreatment 6 h after the above-mentioned effects in part by blocking HO-1 specific inhibitor zinc protoporphyrin ZnPPIX . This implies that HO may be involved in GA-induced expression of the α- amylase gene . Further findings , of Ht or CO aqueous solution with GA combination of wheat aleurone cells PCD induced delay GA ; GA with Ht and CO combination treatment , HO activity , and HO-1 protein expression was also significantly higher than the GA alone ; using ZnPPIX pretreatment 6 h partially reversed these effects , the delayed effects of the antioxidant BHT, DTT , and AsA analog Ht and CO . In addition , compared with GA alone treatment , Ht and CO and GA treatment , CAT and APX two important antioxidant enzyme activity and related gene expression were significantly improved. The above results show that , HO GA - induced wheat aleurone cells can delay PCD, and may be associated with HO antioxidant .

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CLC: > Agricultural Sciences > Crop > Cereal crops > Wheat > Wheat
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