摘要
对木兰科6个常绿树种在南京地区越冬期间的冻害指数、半致死温度、MDA含量及光合色素含量的变化进行了研究,探讨供试树种的抗寒性。结果表明:所有供试树种经过一段时间的低温锻炼后抗寒能力均增加,中亚热带树种的冻害指数和半致死温度均要低于南亚热带树种;越冬期间所有树种的MDA含量均显著上升,叶绿素含量则均下降。综合上述指标对供试树种的抗寒性做出排序:乐东拟单性木兰(Parakmeria lotungensis)>阔瓣含笑(Michelia platypetala)>金叶含笑(Michelia foveolata)>红花木莲(Manglietia insignis)>醉香含笑(Michelia macclurei)>观光木(Tsoongiodendron odorum)。
The performance and the physiological indices including CI, TL50, MDA and Chl. during the course of winter were investigated to study the cold resistance of six evergreen magnolia species. All species＇ chilling assistance was distributed naturally in strengthened after a period of low temperature domestication. The magnolia species that middle-subtropical areas had much lower CI and TL50 than that distributed naturally in sourthem-subtropical areas. All species＇ contents of MDA ascended while Chl. descended during the course of winter. The cold resistance of six magnolia species were arranged in sumarization of the value of above indice： was the strongest, followed by Michelia platypetala, Michelia foveolata, Manglietia insignis, Michelia macclurei and Tsoongiodendron odorum.
出处
《园艺学报》
CAS
CSCD
北大核心
2007年第3期783-786,共4页
Acta Horticulturae Sinica
基金
江苏省级综合性农业科技示范园资助项目(苏农计2003-50)
关键词
木兰
观赏植物
抗寒性
半致死低温
MDA
叶绿素
Magnolia species
Ornamental plant
Cold resistance
TL50
MDA
Chlorophyll
