摘要
通过低温半致死试验和人工气候室低温胁迫试验,对4个女贞品种2年生苗抽梢展叶期的抗寒性进行比较,结果表明:金禾女贞(Ligustrum×Vicaryi Hort.)和女贞(Ligustrum lucidum Ait.)的抗寒性相对较强,金森女贞(Ligustrum japonicum Thunb.‘Howardii’)的抗寒性中等,高森女贞(Ligustrum lucidum Ait.‘Excelsum Super-bum’)的抗寒性表现最差。通过Logistic方程分析计算,在苗木抽梢展叶期,金禾女贞、女贞、金森女贞和高森女贞的低温半致死温度分别为-6.34,-5.69,-4.55,-3.27℃。低温胁迫下,叶片中的SOD活性、可溶性蛋白质、可溶性糖和MDA含量均比常温下高;随着低温胁迫的增强,叶片中的可溶性蛋白质含量呈先上升后下降的趋势,4个品种中3个品种叶片中的可溶性糖含量是先升后降,MDA含量则持续增加。
Using 2-years-old saplings of 4 Ligustrum cultivars,cold stress experiments in phytotron and semilethal low temperature experiments were carried out to study the ircold-resistance.The results were as follows： the cold-resistance of these cultivars had obvious difference,the cold-resistance of Ligustrum×Vicaryi Hort.and Ligustrum lucidum Ait.was higher than that of the other cultivars,that of Ligustrum japonicum Thunb.＇Howardii＇ was middling and that of Ligustrum lucidum Ait.＇Excelsum Superbum＇ was the worst.Respectively,the semilethal low temperatures these cultivars were-6.34 ℃,-5.69 ℃,-4.55 ℃ and-3.27 ℃.Under cold stresses（0 ℃,-7 ℃ and-14 ℃）,for the SOD activity,content of soluble protien,content of soluble sugar and MDA content of leaves were all higher than at 25 ℃;With the strengthening of cold stress,the content of soluble protien increased first,and then decreased,the content of soluble sugar of 3 cultivars increased at 25 ℃ to-7 ℃,decreased at-7 ℃ to-14 ℃,mostly,MDA content continued to increase at 25 ℃ to-14 ℃.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2011年第6期1094-1099,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
江苏省科技支撑计划项目(BE2010311)
江苏省苏北科技发展计划项目(SBN200910136
SBE200870251)
关键词
女贞
品种
抗寒性
低温半致死温度
Ligustrum
cultivars
cold-resistance
semilethal low temperature
