|Table of Contents|

Response of Osmotic Stress and pH on Caragana intermedia Seed Germination and Seedling Growth(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2016年21
Page:
65-72
Research Field:
Publishing date:

Info

Title:
Response of Osmotic Stress and pH on Caragana intermedia Seed Germination and Seedling Growth
Author(s):
ZHAO Wei1; 2; 3; CHEN Lin1; 2; 3; YANG Xinguo1; 2; 3;  LIU Xuedong1; 2; 3; GU Junlong1; 2; 3
(1.Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in North-western China of Ministry of Education,Ningxia University,Yinchuan,Ningxia 750021；2.Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration of North-western China，Ningxia University,Yinchuan,Ningxia 750021；3.Union Research Center for Ecological and Exploitation of Biological Resources in Western China,Ningxia University,Yinchuan,Ningxia 750021)
Keywords:
Caragana intermedia; germination; growth; response surface
PACS:
-
DOI:
10.11937/bfyy.201621017
Abstract:
Taking C.Intermedia seed as test materials，by adopting central composite design and response surface analysis method，the synergetic effects of osmotic potential (-1.76-0.00 MPa) and pH (5.0-8.5) on Gi，VI，GR，relative GR，H，R，SD of C.intermedia under laboratory conditions were discussed.The results showed that the Gi,GR and relative GR decreased with increasing osmotic stress at different Ψπ.Too high (pH 8.5) and too low (pH 5.0) of pH，GR，relative GR were lower than these of pH 6.8，when the osmotic potential at -0.88 MPa.A2(Ψπ2)closed to significant (P=0.050 4)impact on SD；pH achieved extremely significant and significant effects on 5 index，B-pH and B2(pH2)had extremely significant (P=0.009 5，P=0.001 2)and significant(P=0.034 9，P=0.034 6)impact on Gi and VI，respectively，B2 had significant(P=0.034 9，P=0.048 7)impact on GR and relative GR，respectively，B-pH(P=0.035 2) had a significant(P=0.035 2)impact on R.SD increased with increasing osmotic stress in the same pH treatment.A smaller SD value when the osmotic potential closed to the center point，the value increased when the osmotic potential closed to edge，basically.When the pH 6.9~8.5，Gi，VI，GR，relative GR，H showed a tendency of gradually decreased with increasing pH value.When the pH 6.0~8.5，R decreased with increasing pH value；Osmotic potential and pH at (-0.26，5.9)，growth index reached the optimal value，Ψπ，pH，H，R,SD，GR，relative GR，Gi and VI，reached to -0.26 MPa，5.9，11.78 mm，7.45 mm，1.70 mm，73.75%，92.19%，35.85 and 4.99，respectively，the desirability were 0.75.So osmotic stress of trace amounts and micro-acidic environment promote the seed germination and seedling growth of Caragana intermedia.

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Last Update: 2016-12-28