摘要
笔者以东南亚收集到的野生海巴戟种质WT1a,WT1b,WT2,WT3和WT4为实验材料,通过室内模拟低温胁迫对5个海巴戟种质进行相关生理指标测定和分析,并运用隶属函数法对5个种质的抗寒性进行评价,结合田间的实验观察进一步验证5个海巴戟种质的抗寒能力。结果表明,相对电导率、MDA含量和POD酶活性可作为海巴戟抗寒性评价的参考指标;5个海巴戟种质中WT1a种质的抗寒能力最强,WT4的抗寒能力较差;通过数据的变化情况,推测低温胁迫后的4~6 d是海巴戟寒害发生的时间临界点。
Five accessions of wild germplasm of Morinda citrifolia Linn,WT1 a,WT1 b,WT2,WT3 and WT4,were collected in the Southeast Asia and used as experimental materials.They were treated indoor with low temperature to determine and analyze their physiological indexes.Cold resistance ability of the five accessions was evaluated by the membership function method,and then verified in field trials through experimental observation.The results showed that conductivity,MDA content and POD activity could be used as reference indices for evaluation of the cold resistance of M.citrifolia Linn.The accession WT1 a showed the highest cold resistance,while the accession WT4 had the lowest cold resistance.It is inferred that the time threshold for cold injury of M.citrifolia Linn be 4-6 days after low temperature stress was imposed on M.citrifolia Linn.
作者
赵帅
阙艳鹏
夏栋楠
符文英
ZHAO Shuai;QUE Yanpeng;XIA Dongnan;FU Wenying(Institute of Tropical Agriculture and Forest巧, Hainan University, H田nkou, Hainan 570228 , Chin)
出处
《热带生物学报》
2018年第1期69-75,共7页
Journal of Tropical Biology
基金
国家自然基金项目(31360066)
国家农业成果转化基金项目(2013GBE200392)
关键词
海巴戟
抗寒性
低温胁迫
隶属函数法
生理指标
Morind, α citrifoliαLinn
cold resistance
low temperature stress
membership function method
physiological index