UV胁迫下芦荟蒽醌类物质对辣椒生长发育的影响

Effects of Aloe's Anthraquinones on the Growth of Capsicum frutescens L. under Ultraviolet Radiation Stress

大气平流层的臭氧层逐渐破坏导致UV辐射增加,对作物产生不同程度的伤害。该试验研究了芦荟蒽醌类物质对增强UV辐射条件下辣椒生长发育和生理生化的影响,探索预防UV辐射对植物伤害的新途径。结果表明:在增强UV辐射条件下,喷施芦荟蒽醌类物质的辣椒,其株高、干鲜比和叶绿素含量都有所增加;脯氨酸和丙二醛生理生化指标都略降低,辣椒的生长发育接近正常水平。由于芦荟蒽醌类物经紫外光激发能发出荧光,据此分析,芦荟蒽醌类物质能吸收并消耗一部分UV辐射能量,从而有效减少UV辐射对植物的伤害。

The destruction of Ozone in the stratosphere led to a increase of UV radiation reaching to the earth surface,which would harm crops in varying degrees.In order to explore new approaches to prevent or alleviate the UV harm,the effects of Aloe s anthraquinones on the growth and physiological indexes of Capsicum frutescens L.under ultraviolet radiation（UV 280～320 nm） stress were investigated.The results showed that the height,ratio of dry weight to wet weight and the contents of chlorophyll of the Capsicum frutescens L. leaves sprayed with aloe anthraquinones increased separately. And the contents of free proline and MDA decreased. Aloe anthraquinones could absorb and consume a part of energy of ultraviolet radiation, so the harm of ultraviolet radiation to plants could be reduced effectively by spraying aloe anthraquinones on plant surfaces.