摘要
为探讨早春甘蓝和秋甘蓝种苗时期的逆温耐性问题,以甘蓝种子为试材,研究了不同温度预处理甘蓝种子在萌发阶段对高温和低温的耐性变化。结果表明,甘蓝种子萌发的最适温度为20℃,在低于15℃和高于35℃下萌发,种子活力显著下降。通过适度的温度预胁迫处理,可提高甘蓝种子在高温(35℃)下的萌发活力。10℃和30℃分别是温度预处理的适宜低温和高温,8 h是高温和低温预处理的适宜时间。甘蓝种子经低温(5℃和10℃)预处理后,在随后的高温(35℃)下萌发,其活力提高;同样,甘蓝种子经高温(25℃和30℃)预处理后,在随后的低温(10℃)下萌发,也提高其种子活力,说明甘蓝种子对高温和低温胁迫具有交叉适应性。
To investigate adverse temperature tolerance induction in summer and autoumn cabbage, changes in adverse temperature tolerance of pretreated cabbage seeds with different degrees of temperature during germination were investigated. Results show that the optimum germination temperature of cabbage seeds is 20 ℃, and that germination vigor decreases remarkably when seeds germinate under above 35℃ or below 15℃. Mild pretreatment temperature can greatly improve the germination ability of cabbage seed in high temperatures （35 ℃）. Minimum and maximum pretreatment temperatures are 10 ℃ and 30℃ respectively, optimal pretreatment time is 8 hours. Pretreatment lower temperatures of 5 ℃and 10℃ improves seed vigor in high temperature （35 ℃） ,while pretreatment higher temperatures of 25℃ and 30 ℃ improves seed vigor in low temperature（10℃）, implying that cabbage seeds have cross adaptation to heat and chilling stress.
出处
《中国生态农业学报》
CAS
CSCD
2008年第5期1158-1162,共5页
Chinese Journal of Eco-Agriculture
基金
河南省自然科学基金项目(0611031000)
河南省科普示范点建设项目(豫科[2005]157号)
河南省农业产业结构调整项目(豫财办农[2005]219号)资助
关键词
甘蓝种子
种子活力
逆温
耐性诱导
种子预处理
交叉适应性
Cabbage seed, Seed vigor, Adverse temperature, Temprature tolerance induction, Seed pretreatment, Cross adaptation
