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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (3): 743-750    DOI: 10.7522/j.issn.1000-694X.2013.00107
Biology and Soil     
Response of Seeds Germination of Populus euphratica and Populus pruinosa to Slat Stress
WANG Hai-zhen1,2,3, HAN Lu1,2, JIA Wen-suo3
1.College of Plants Science, Tarim University, Alar 843300, Xinjiang, China;
2.Key Laboratory of Biological Resources Protection and Utilization of Tarim Basin, Xinjiang Production & Construction Corps, Alar 843300, Xinjiang, China;
3.College of Agriculture & Biotechnology, China Agricultural University, Beijing 100193, China
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Abstract  

An experiment was conducted to compare salt tolerance of Populus euphratica and Populus pruinosa under eight different NaCl and mixed salt treatments and evaluated by the fuzzy subordination methods. Our objective was to elucidate the threshold salinity for the two species under different salt treatments and suitable germination habitat. The results showed that germination percentage, relative germination percentage, germination energy, germination index and cotyledon outspread rate of the two species declined and relative salt harm rate ascended with increasing NaCl stress. The relative germination percentage of two species exceeded 75% under <0.4% solution, and the value came near to zero under 1.4%. The germination percentage of the two species were not significantly different under NaCl stress(p>0.05). The average germination percentage, subordinate function values, threshold salinity of P.euphratica was higher than that of P.pruinosa, which indicated that P.euphratica had a higher salt tolerance than P.pruinosa under NaCl stress. However, the germination percentage and index of the two species were higher than that of CK under low concentration of mixed salt, whereas high concentration of mixed salt could inhibit seed germination. The relative germination percentage of the two species exceeded 80% under <0.8% solution, and the value also exceeded 20% under 1.6%. The germination percentage of the two species were significantly different under mixed stress(p<0.01). The average germination percentage, subordinate function values,threshold salinity of P.pruinosa were higher than that of P.euphratica, indicating that P.pruinosa was more salt tolerant and well ecologically adaptive than P.euphratica under natural condition. NaCl had greater harmfulness on seed germination than mixed salt. The experiment revealed that P.euphratica and P.pruinosa were higher salt tolerant, the low salinity was the important factor for seeds germination and seedlings establishment of desert dominant species.

Key words:  Populus euphratica      Populus pruinosa      salt stress      seed germination      threshold salinity     
Received:  11 January 2013      Published:  27 February 2013
ZTFLH:  Q948.1  
Articles by authors
WANG Hai-zhen1
2
3
HAN Lu1
2
JIA Wen-suo3

Cite this article: 

WANG Hai-zhen1,2,3, HAN Lu1,2, JIA Wen-suo3. Response of Seeds Germination of Populus euphratica and Populus pruinosa to Slat Stress. JOURNAL OF DESERT RESEARCH, 2013, 33(3): 743-750.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00107     OR     http://www.desert.ac.cn/EN/Y2013/V33/I3/743

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