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Physiological and Ecological Responses of Mirabilis himalaica to Drought Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年08
Page:
152-156
Research Field:
Publishing date:

Info

Title:
Physiological and Ecological Responses of Mirabilis himalaica to Drought Stress
Author(s):
DAI Song-jia1; WEI Jing-jing1; LAN Xiao-zhong2
(1.Institute of Tibetan Plateau Ecology，Agricultural and Animal Husbandry College of Tibet University，Nyingchi，Tibet 860000;2.TAAHC-SWU Medicinal Plants Joint Research and Development Centre,Agricultural and Animal Husbandry College of Tibet University,Nyingchi，Tibet 860000)
Keywords:
Mirabilis himalaica (Edegw.) Heim.; drought stress; osmotic; protective enzyme; membrane lipid peroxidation
PACS:
S 685.16
DOI:
10.11937/bfyy.201508040
Abstract:
Tanking one-year-old seedling of Mirabilis himalaica (Edegw.) Heim as material，using pot experiment and natural drying method，physiological and ecological response of soil drought stress to Mirabilis himalaica (Edegw.) Heim.was studied.The results showed that，with the drought degree intensified，the change of the Mirabilis himalaica (Edegw.) Heim.leaf relative water content (LRWC) and the content of chlorophyll (chlorophyll) under the mild drought stress change was not big，under the soil moisture content 8.88%-9.58% (28 d)，began to change significantly;The content of proline and soluble sugar increased with the decreasing RWC;The Mirabilis himalaica (Edegw.) Heim.through the synergy of SOD and POD to removing oxygen free radicals in the body，achieve the purpose of resist drought adversity，POD activity function was greater than the SOD activity.Through the way such as osmotic adjustment and activities of antioxidant enzymes increasing,Mirabilis himalaica (Edegw.) Heim.enhanced resistance and adaptability to drought environment;The Mirabilis himalaica (Edegw.) Heim.had strong drought resistance，drought stress of 28 d (soil moisture content 10%) was the tolerance limit.

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Last Update: 2015-08-07