自由基清除剂对青花菜衰老生理的影响

INFLUENCES OF FREE RADICAL SCAVENGERS ON THE SENESCENCE PHYSIOLOGY OF BROCCOLI (BRASSICA OLERACEA VAR. ITALICA)

在常温结合0．03mmPE膜包装条件下，研究了自由基清除剂对青花菜采后衰老的影响。结果表明，40mg／kg6－BA处理，可明显延缓组织MDA含量和电导率的上升，激活CAT，SOD活性，保持较低的POD活性，抑制膜脂过氧化作用和叶绿素的分解。2g／kg苯甲酸钠能有效延缓青花菜衰老。6－BA与苯甲酸钠结合使用具有增效作用，可进一步延缓衰老过程。200mg／kg抗坏血酸处理，加速青花菜的衰老过程。

Packaged broccoli(Brassica oleracea var.italica P.) was stored at ambient temperature to study the influence of radical scavengers on its post-harvest aging.6-BA at 40 mg/kg markedly delayed the increase in MDA content and electric conductivity of the tissue, promoted CAT and SOD activity,kept POD activity at a relatively low level and inhibited the decomposition of chlorophyll and the peroxidation of cell membranes.SBN at 2 g/kg effectively delayed the senescence of broccoli florets.The combination of 6-BA and SBN showed a synergistic effect.Ascorbic acid (AsA) at 200 mg/kg accelerated the senescence of broccoli.