|Table of Contents|

Physiological Responses of Mukdenia rossii Under PEG-6000 Drought Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年22期
Page:
74-78
Research Field:
Publishing date:

Info

Title:
Physiological Responses of Mukdenia rossii Under PEG-6000 Drought Stress
Author(s):
ZHANG Shuang1; ZHAO Chun2; DONG Ran1; ZHAO Rui1; XU Jia-wen1
1.College of Horticulture,Jilin Agricultural University,Changchun,Jilin 130118;
2.Greening Management Office of Changchun City,Changchun,Jilin 130062
Keywords:
Mukdenia rossii(Olive) Koidz; PEG-6000; drought stress; physiological responses
PACS:
S 567. 239
DOI:
-
Abstract:
Taking the annual seeding of Mukdenia rossii (Olive) Koidz as experimental material,the method of stimulated drought stress by applying PEG-6000 were adopted,the effect of different concentrations of PEG-6000 (be 0%（CK）,10%,15%,20%,25% respectively) and different time(24,48,72,96 h）on the physiological and biochemical indexes of Mukdenia rossii and its drought tolerance were studied,thus provided a theoretical basis for the application of Mukdenia rossii in landscaping.The results showed that the Mukdenia rossii could adapt to mild drought stress through osmoregulation thus showed drought resistance to some extent.Along with the increasing of the stress intensity and the extension time,several changes occurred.The relative water content（RWC）of Mukdenia rossii was in downward trend while the relative electrolytic conductivity (REC) was in upward trend.The content of malonaldehyde (MDA) was in a trend of first rising,then falling and bakes to rising again.The proline (Pro) content was in trend of rising after the first drop.The SOD activity had a trend of up-down-up-down.All of them showed obvious difference in comparing (P<0.05).The related analysis indicated that there was a significant correlation between REC,MDA content,Pro content and RWC.On the contrary,that relation didn’t occur between SOD activity and RWC.Therefore,RWC,REC,MDA content and Pro content could be used to evaluate the drought tolerance of Mukdenia rossii

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Last Update: 2014-08-06