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OALib Journal期刊
ISSN: 2333-9721
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微波处理对uv-b损伤菘蓝幼苗非酶类抗氧化剂生物合成的影响
DOI: DOI: 10.3724/SP.J.1145.2008.00830, PP. 830-833
Keywords: 菘蓝,微波,uv-b损伤,抗氧化剂
Abstract:
采用微波预处理菘蓝(isatisindigoticafort)种子，待种子出土萌发后进行uv-b辐射(10.08kjm-2d-1，par=220?molm-2d-1)处理6d，研究了经不同时间微波辐照后菘蓝种子发育而成的幼苗在uv-b辐射下非酶类抗氧化剂(紫外吸收物质、花青素甙、谷胱甘肽、抗坏血酸和脯氨酸)的生物合成情况.结果显示，在uv-b辐射条件下，4种微波预处理均能不同程度促进紫外吸收物质、花青素甙、谷胱甘肽、抗坏血酸和脯氨酸的生物合成，降低丙二醛含量，增强幼苗对uv-b伤害的抗性.这表明，适当时间的微波预处理可以提高植物对增强uv-b辐射的抵抗能力，与此同时，过长时间微波处理也会抑制植物的生理生化代谢和非酶类抗氧化剂的生物合成，加重对植物的伤害.因此，微波具有相悖的防护效应，在生物学上应用时其剂量的大小十分关键.表1参17
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