花色苷是有色稻种皮和颖壳里呈现颜色的主要物质,属于类黄酮类物质,具有抗氧化性。本研究围绕水稻种子形成过程中花色苷含量的变化以及其对稻谷储藏特性变化的影响,探讨花色苷在稻谷储藏中延长种子寿命的作用。结果显示:选取的3个品种中,水稻种子的花色苷形成主要在发育初期,随着颖果体积的增大,颖果花色苷的含量会逐渐降低,而颖壳的花色苷含量变化不显著,将种子进行人工老化后,仍只有颖果的花色苷含量出现下降的趋势,表明种子在老化过程中颖壳的花色苷不参与抗老化的各项代谢反应。老化种子SOD活性分析显示花色苷含量低的种子9311可能是通过SOD酶活性增加,削减高温高湿胁迫对种子衰老的影响;由稻谷感染霉菌情况显示在3个水稻品种中,花色苷含量高的品种的抗霉菌能力要稍优于花色苷含量低的品种。但综合来看,花色苷含量高低并不是决定种子寿命的的主要因素。
Anthocyanin, mainly existing in glume and episperm of colored rice, is a group of compounds formed from anthocyanidin and glucoside. Because of the structure of flavonoid, anthocyanin has the ability of antioxidation. The paper reported the changes of rice anthocyanin in growing and ageing processes and the function of rice anthocyanin to extend seed longevity in seed storage. The results indicated that rice anthocyanin had been accumulated in the early stage. With the increase of the seed’s size, anthocyanin content gradually decreased in caryopsis; meanwhile, the anthocyanin content did not change significantly in glume. After artificial ageing, the anthocyanin content notably decreased, contrary to the result in glume. It might indicate that the anthocyanin in glume doesn’t get involved in antioxidant response. The analyses of mycotic infection of ageing seeds suggested that, in the three varieties, the anti-mycete ability of the ones with higher content of anthocyanin was better than that with lower content of anthocyanin. Considering the results, anthocyanin was not the crucial factor in seed storage.
张丽丽,刘斌美,许学,等.水稻种子花色苷形成及其对稻谷储藏特性的影响[J].植物遗传资源学报,2012,13(6):974-978.
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