摘要
研究了3种化学试剂处理对麻疯树幼苗低温前后抗氧化酶活性及相关生理生化指标的影响。结果表明:在低温胁迫前对麻疯树幼苗分别喷施不同浓度的NaCl、SA和PP333溶液,POD和SOD活性及相对电导率均发生变化。低温胁迫前,喷施0.1 mmol/L SA和0.1 mmol/L PP333溶液的麻疯树幼苗叶片POD和SOD活性均高于对照,可溶性蛋白质含量亦高于对照;低温胁迫后,两处理相对电导率和MDA值上升幅度低于对照和其他处理,且落叶时间推迟。表明对麻疯树幼苗喷施0.1 mmol/L SA和0.1 mmol/L PP333溶液能减缓低温胁迫下细胞膜的损伤;试验还发现,喷施NaCl溶液后植株可溶性蛋白质含量升高,不同化学试剂处理效果存在较大差异,而喷施化学试剂的抗寒效果优于对照。
Jatropha curcas seedlings were treated by three chemicals in the different concentrations and the activities of an- tioxidases and some other physiological characteristics during chilling stress were studied. The results showed that the activity of POD and SOD as well as the soluble protein content was obviously elevated in treatments of 0.1 mmol/L paclobutrazol and 0.1 mmol/L Salicylate ( SA), respectively, compared with the control before the chilling stress. After the chilling stress, the increases of electrica/conductivity and MDA were lower in the treatments of 0.1 mmol/L paclobutrazol and 0.1 mmol/L SA than that in the control and the other treatments, and the timing of leaf abscission was prolonged. This indicated that spraying with the solutions of 0. 1 mmol/L paclobutrazol and 0. 1 mmol/L SA could alleviate the damage of cell membrane under the low-temperature stress and thus improve cold resistance of Jatropha seedlings. It was also found that spraying with NaCI could increase the soluble protein content of seedlings and improve cold resistance to some extent.
出处
《林业科技开发》
2010年第2期26-30,共5页
China Forestry Science and Technology
关键词
麻疯树幼苗
低温胁迫
保护剂
抗寒性
Jatropha curcas seedling
Low-temperature-stress
Chemicals
Cold resistance