|Table of Contents|

Changes of Cold Resistance of Floral Organs During Sprout in Different Tree Peony Cultivars(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年06期
Page:
52-56
Research Field:
Publishing date:

Info

Title:
Changes of Cold Resistance of Floral Organs During Sprout in Different Tree Peony Cultivars
Author(s):
WANG Wei1ZHANG Xu-dong12SHI Jiang1GAO Shuang-cheng1WANG Zhe1SHI Guo-an1
1.Luoyang Key Laboratory of Peony Biology,College of Agriculture,Henan University of Science and Technology,Luoyang,Henan 471003;
2.College of Forestry,Northwest Agricultural and Forestry University,Yangling,Shaanxi 712100
Keywords:
tree peonyfloral organsupercooling pointfreezing pointcold resistance
PACS:
S 685.11
DOI:
-
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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Last Update: 2014-08-23