自然条件下甘蔗品种抗寒生理生化特性的比较

为了筛选耐寒优良甘蔗品种，在广西霜、雪、冰期最早、最长的县份之一的资源县，选用21个甘蔗品种进行试验，在甘蔗成熟期温度明显不同的3个时间段采样，观察甘蔗在低温过程中的整体形态变化，分析与抗寒性相关的6个生理生化指标，结合相关性检验，采用隶属函数法对21个甘蔗品种进行抗寒性综合评价。试验结果表明不同甘蔗品种对长时间持续低温的反应各异，其中可溶性蛋白质含量迟钝，脯氨酸和丙二醛含量敏感；根据隶属函数法的分析结果，将供试品种划分为3级，其中I级高抗寒型4个品种，II级抗寒型10个品种，III级低抗寒型7个品种。分析结果表明选择多个生理生化指标，采用隶属函数法，综合评估甘蔗工艺成熟期的抗寒性是可行的，可以较好地揭示指标性状与抗寒性的关系，为甘蔗生产提供参考依据。

Comparison of Physiological and Biochemical Characteristics Related to Cold Resistance in Sugarcane under Field Conditions

In order to screen the cold tolerant sugarcane varieties,in Ziyuan County,one of the coldest counties having the longest duration for frost and snow,in Guangxi province we comprehensively evaluated 21 sugarcane varieties using subordinate function method combined with correlation analyses based on six physiological and biochemical indexes relevant to cold tolerance under natural conditions.It was found that different sugarcane varieties had different responses to the long duration of continuous cold stress,...