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Effect of Soil Drought on Physiological Characteristics of Catalpa fargesii Bur.f.duclouxii Seedlings(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年23期
Page:
92-95
Research Field:
Publishing date:

Info

Title:
Effect of Soil Drought on Physiological Characteristics of Catalpa fargesii Bur.f.duclouxii Seedlings
Author(s):
YANG Zi-yun1；JIANG Yong-lei1；CAI Yun-cong1；LI Tai-bing2
1.College of Landscape Architecture，Southwest Forestry University，Kunming,Yunnan 650224
2.Sichuan Institute of Forestry,Chengdu,Sichuan 610081
Keywords:
drought stress; Catalpa fargesii Bur.f.duclouxii; physiological characteristics; antioxidant enzymes
PACS:
S 792.99
DOI:
-
Abstract:
Taking Catalpa fargesii Bur.f.duclouxii seedlings as experiment material,with wellwatered (100% FC) as CK,the effect of drought stress(70% FC) on physiological characterstics of Catalpa fargesii Bur.f.duclouxii seedlings was studied,in order to reveal the physiological and ecological characteristics and adaptability of drought stress.The results showed that soil drought significantly decreased contents of leaf relative water，chlorophyll a (Chl a) content，total chlorophyll (T Chl) content and Chl a/b.While the contents of chlorophyll b (Chl b) and carotenoid (Car) content pigment were not significantly varied；the soluble proteins content，the proline content and CAT activity，as well as the POD activity and SOD activity were increased evidently.These results reveal that Catalpa fargesii Bur.f.duclouxii seedlings increased their drought resistance by changing their physiological properties.The drought stress promoted the soluble proteins content，proline content and improved the antioxidative enzymes activities，which suggested the Catalpa fargesii seedlings could resist drought stress by improving its antioxidative enzymes activities and osmotic regulation system.

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Last Update: 2014-08-20