Dynamic Changes of Physiological Indexes Related to Cold Resistance in Evergreen Broad-leaved Shrub Pachysandra terminalis During Winter(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:

2012年24期

Page:

70-73

Research Field:

Publishing date:

Info

Title:

Dynamic Changes of Physiological Indexes Related to Cold Resistance in Evergreen Broad-leaved Shrub Pachysandra terminalis During Winter

Author(s):

YAN Hai-yan¹; DONG Ran¹; YU Xiang-li²; FENG Min¹

1.College of Horticulture，Jilin Agricultural University，Changchun，Jilin 130118；

2.Second Forest of Changchun City Jingyue Tourism Development Zone，Changchun，Jilin 130118

Keywords:

P.terminalis; physiological indexes; dynamic changes; cold resistance

PACS:

S 793

DOI:

-

Abstract:

Taking 5-year-old cuttage seedlings of evergreen broad-leaved shrub P.terminalis as test materials,dynamic changes of relative conductivity,MDA content,SOD activity,POD activity，proline content and soluble sugar content were investigated，the physiological characteristics of cold resistance of P.terminalis during winter were studied.The results showed that with the variation of natural temperature,relative conductivity and MDA content increased first and then decreased；the activity of SOD and POD probably followed the regularity that increased first and then decreased,and the activities were the highest when daily minimum air temperature reached the lowest during winter;proline content and soluble sugar content increased first and then decreased,proline accumulated rapidly with the strengthened chilling stress and decreased markedly when the climate was warmer.In the overwintering period，the dynamic response of the above indexes to the variation of natural temperature showed that P.terminalis had good physiological basis to resist low temperature,it was an evergreen broad bush that equipped with large potential of development and utilization in Changchun and other places where the air temperature was very low in winter.

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