|Table of Contents|

Effects of Drought Stress on Physiological Characteristics of Sapling of Picea pungens var.glauca

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年15
Page:
76-81
Research Field:
Publishing date:

Info

Title:
Effects of Drought Stress on Physiological Characteristics of Sapling of Picea pungens var.glauca
Author(s):
MENG Fanjin; YE Jingfeng; WEI Zhongping; LIU Yifei; BU Pengtu; ZHENG Ying
(Liaoning Academy of Forestry Sciences,Shenyang,Liaoning 110032)
Keywords:
Picea pungens var.glauca; drought stress; physiological characteristics; photosynthesis
PACS:
-
DOI:
10.11937/bfyy.20183924
Abstract:
The 1-year-old Picea pungens var.glauca saplings were used as test materials,and the pots were treated with drought stress.The experiment consisted of a control (CK,40% water),mild drought (H1,30% moisture),and moderate mild drought (H2,20% water),moderate drought (H3,10% moisture) and severe drought (H4,5% water).After 4 weeks,the physiological characteristics of the young saplings were determined.In order to provide scientific support for the rational planning of water supply and selection of planting sites in the blue cedar nursery.The results showed that,1) drought stress interfered with the balance of organic permeate and relative conductivity of saplings,proline content was decreased and soluble sugar content was increased；2) drought stress inhibited sapling antioxidant enzyme activities in leaves,activities of peroxidase and superoxide dismutase were decreased,and malondialdehyde content was increased；3) drought stress inhibited photosynthesis rate of saplings,chlorophyll a,chlorophyll b content and leaf gas exchange rate were decreased；4) under mild drought stress (H1),the growth physiological characteristics of saplings were not significantly affected compared to CK；5) under the action of drought stress,the water content of not less than 20% was the broad value of the growth of blue-shirt saplings.However,as the stress increased,its physiological and photosynthesis characteristics were significantly disturbed.This study suggested that Picea pungens var.glauca can be planted in mildly arid areas；during the breeding and planting process,it should avoid harmful effects on the drought.

References:

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Last Update: 2019-08-16