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Study on Drought Resistance of Five Kinds of Forage Grasses During Seed Germination Period Under PEG Stress(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2015年12
Page:
54-58
Research Field:
Publishing date:

Info

Title:
Study on Drought Resistance of Five Kinds of Forage Grasses During Seed Germination Period Under PEG Stress
Author(s):
WANG Ying; XU Dong-mei
Agricultural School，Ningxia University，Yinchuan，Ningxia 750021
Keywords:
PEG; seed germination; drought resistance
PACS:
S 543
DOI:
10.11937/bfyy.201512016
Abstract:
The seeds of five kinds of forage grasses which included Agropyron desertorum，Agropyron mongolicum，A.gropyon cristatum×A.desertorum?cv.Hycrest Mengnong，Psathyrostachys juncea (Fisch.) Nevski and Bromus inermis Leyss were selected and germinated under different drought stress conditions by simulating with different concentrations of PEG6000(-0.3 MPa,-0.6 MPa,-0.9 MPa,-1.2 MPa).The relative germination percentage，relative germination rate，radicle germ ratio，simplified vigor index and germination index were determined.The results showed that,the low concentration of PEG (-0.3 MPa) significantly promoted seed germination of Agropyron mongolicum and A.gropyon cristatum×A.desertorum cv.Hycrest Mengnong.According to average values of radicle germ ratio，simplified vigor index and germination index,-0.6 MPa water potential may be the critical value for drought resistance of the forage grasses.The drought resistances of the five forage grasses were comprehensively evaluated by using membership function.The evaluation value of the five kinds of forage grasses from high to low were Bromus inermis Leyss, Agropyron mongolicum，Agropyon cristatum×A.desertorum cv.Hycrest Mengnong, Agropyron desertorum and Psathyrostachys?juncea (Fisch.) Nevski.

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Last Update: 2015-08-09