摘要
研究日本厚朴的越冬期生理变化规律;探求日本厚朴的安全越冬能力。以日本厚朴引种实生苗为试材,于越冬期不同阶段设置温度梯度,系统分析低温胁迫下其植株的生理生化变化,并以白玉兰为对照。结果表明:休眠初期组织内SOD,MDA,游离脯氨酸和可溶性糖的含量均比较低,休眠中期温度降低,各种物质含量增加,其中可溶性糖含量变化明显,休眠末期各种物质含量减少;低温处理过程中各种物质含量也有不同程度增加,其中游离脯氨酸含量变化显著;日本厚朴的半致死温度略低于白玉兰。越冬过程中,日本厚朴组织中可溶性糖含量变化显著,可以作为鉴定日本厚朴抗寒性的生理指标,在沈阳地区背风向阳处可以安全越冬。
The cold-resistant mechanism of Magnolia obovata was studied for seeking the ability of Magnolia obovata through the winter survives safely. Magnolia obovata was used in the study of the effects of low temperature on the physiological and biochemical changes, compared with Magnolia denudate. In the initial dormancy period tissue SOD, MDA, proline and soluble sugar content were low. In intermediate dormancy stage, along with the temperature decreased, the above material contents increasd, the soluble sugar content changed more obviously. In late dormancy stage, the contents reduced. In the low-temperature treatment process all material contents increased in varying degrees, with proline content changing more remarkable. The LTso of Magnolia obovata was lower than that of Magnolia denudate. Through the winter, the tissue soluble sugar content changed remarkably, which could be used as Magnolia obovata winter-resistant physiological index. Magnolia obovata planted toward the sun may safely survive through winter in Shenyang.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2006年第6期845-848,共4页
Journal of Shenyang Agricultural University
基金
辽宁省科学技术计划项目(2004-JH3/ZX04-01-1-0563)
