WANG Wei,ZHANG Xu-dong,SHI Jiang,et al.Changes of Cold Resistance of Floral Organs During Sprout in Different Tree Peony Cultivars[J].Northern Horticulture,2013,37(06):52-56.
不同品种牡丹萌芽过程中组织抗冷性的变化
- Title:
- Changes of Cold Resistance of Floral Organs During Sprout in Different Tree Peony Cultivars
- 文章编号:
- 1001-0009（2013）06-0052-05
- Keywords:
- tree peony; floral organ; supercooling point; freezing point; cold resistance
- 分类号:
- S 685.11
- 文献标志码:
- A
- 摘要:
- 以牡丹品种“洛阳红”和“凤丹白”为试材，利用热电偶测温仪测定萌芽过程中不同部位（老茎、鳞片、幼叶、幼茎、苞叶、萼片、花瓣）组织的过冷点及冰点温度，分析牡丹萌芽过程中不同组织抗冷性的变化。结果表明：“洛阳红”和“凤丹白”在萌芽过程中，不同部位组织的过冷点和冰点温度均呈上升趋势，抗冷能力逐渐减弱。“洛阳红”抗冷能力强于“凤丹白”。比较相同时期花器官的过冷能力，7个部位有差异，其中新生幼茎和萼片抗冷性最强。表明牡丹开花前具有抵抗-3~-5℃左右突发低温天气急变的能力。
- Abstract:
- Taking the cultivars ‘Luoyanghong’ and ‘Fengdanbai’ of tree peony as test materials，the supercooling points (SCP) and freezing points (FP) of tree peony were measured in seven different parts (old stem，squama，initial leaf，initial stem，bract，sepal，petal) by thermocouple，the changes of cold resistance of floral organs were studied.The results showed that with floral organs sprouting，the supercooling point and the freezing point increased，which indicated that the cold resistance decreased.The cold resistance of ‘Luoyanghong’ was stronger than that of ‘Fengdanbai’.Comparing supercooling points of the seven parts of the same stage，freezing points displayed apparent diversity and the cold resistances of initial stems and sepals were the strongest.The results suggested that tree peony had the ability to resist sudden changes of cryogenic climate around -3℃ to -5℃ before flowering.
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备注/Memo
第一作者简介：王玮（1983-），男，在读硕士，研究方向为牡丹生物学。E-mail:wwtxxm@163.com.