|Table of Contents|

Seed Germination Responses of Haloxylon ammodendron to Drought and Salt Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年01
Page:
55-60
Research Field:
Publishing date:

Info

Title:
Seed Germination Responses of Haloxylon ammodendron to Drought and Salt Stress
Author(s):
LYU Chaoyan1; 2; ZHANG Ximing2; LYU Wei3; GAO Zhixi1; WANG Jiazhen4
(1.Department of Agriculture and Technology，Zunyi Normal College，Zunyi,Guizhou 563002；2.Xinjiang Institute of Ecology and Geography，Chinese Academy of Sciences，Urumqi,Xijiang 830011;3.Department of Public Policy and Management，Zunyi Normal College，Zunyi,Guizhou 563002;4.Department of Life Science，Zunyi Normal College，Zunyi,Guizhou 563002)
Keywords:
Haloxylon ammodendron; salt stress; drought stress; seed germination
PACS:
-
DOI:
10.11937/bfyy.201601015
Abstract:
Using physiological principles of ecology，focused on the seed suitability of plant in the harsh desert environment，and based on laboratory simulation，with seeds of Haloxylon ammodendron from different habitat as materials,the effect of drought and salt stress on seed germination of Haloxylon ammodendron was studied.The results showed that a trend could be observed in all seeds from different populations in PEG and saline solutions.All germination rate decreased with decreasing water potential.When the water potential reached -2.26 MPa and -4.15 MPa separately，the germination rates in all population were close to 0.The inhibitory effect on germination of all the seeds could be detected in NaCl and Iso-osmotic PEG.And the inhibitory effect of Iso-osmotic NaCl was lower than PEG.It showed that the osmotic stress was the main factor that affect the germination of H.ammodendron.When salinity stress was alleviated,the germination of H.ammodendron could recover quickly.And it meant that hypersaline conditions could induce dormancy of these species.In the equal water potential，the re-germination rate in PEG solution was lower than in NaCl.It included the effect of ion stress on germination was lower than osmotic stress.Therefore,H.ammodendron’s high adaptability of seed germination to drought and salinity stress was the basis of the population’s restoration and conservation.

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Last Update: 2016-03-02