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Frontiers of Agriculture in China

ISSN 1673-7334

ISSN 1673-744X(Online)

CN 11-5729/S

Front Agric Chin    2011, Vol. 5 Issue (3) : 310-321    https://doi.org/10.1007/s11703-011-1098-y
RESEARCH ARTICLE
Influence of some chemical compounds on germination and early seedling growth of two range species under allelopathic conditions
Morteza SABERI1(), Alireza SHAHRIARI1, Farajollah TARNIAN2, Mohammad JAFARI2, Hanie SAFARI2
1. Faculty of Natural Resources, University of Zabol, Iran; 2. Faculty of Natural Resources, University of Tehran, Iran
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Abstract

Seed priming technique has been known to improve germination and seedling emergence under different environment stresses. The objective of this study was to evaluate the effectiveness of seed priming in improving the seed germination and seedling vigor of Agropyron elongatum and Bromus inermis in response to five concentrations of the allelopathic extract of Thymus kotschyanus (0, 5%, 25%, 50% and 75%) under laboratory conditions. Pretreatments included gibberellic acid (250, 500 and 1000 ppm), potassium nitrate (0.1%, 0.2% and 0.3%) and salicylic acid (100, 200 and 300 mg/L). This experiment was carried out as a factorial experiment based on a completely randomized design with four replications. The results showed that seed germination, germination speed and seedling vigor were significantly decreased (P<0.01) by increasing extract concentrations of Thymus kotschyanus allelopathic compounds in unprimed seed (control) compared with primed seeds. Seed priming enhanced germination percentage, germination speed and initial growth. Overall, the results of this study showed that the response of both species to pretreatment of seeds was positive. Therefore, pretreatments of seeds with the aforementioned chemical stimulators before planting can significantly reduce the negative effect of allelopathic compounds in Thymus kotschyanus during the germination stage and contribute to plant establishment by increasing germination speed and growth of embryos.

Keywords allelopathy      germination      chemical stimulators      Thymus kotschyanus      Bromus inermis      Agropyron elongatum     
Corresponding Author(s): SABERI Morteza,Email:m_saberi63@yahoo.com   
Issue Date: 05 September 2011
 Cite this article:   
Morteza SABERI,Alireza SHAHRIARI,Farajollah TARNIAN, et al. Influence of some chemical compounds on germination and early seedling growth of two range species under allelopathic conditions[J]. Front Agric Chin, 2011, 5(3): 310-321.
 URL:  
https://academic.hep.com.cn/fag/EN/10.1007/s11703-011-1098-y
https://academic.hep.com.cn/fag/EN/Y2011/V5/I3/310
PropertiesABA*BError
Germination percentagef9436150
ss462.72013.983.6811.26
ms51.4503.52.320.07
F4.5**44.95**0.21ns
Germination speedf9436150
ss1150.5299.1635.811.3
ms127.874.80.990.07
F1697.5**993.1**13.2**
Root lengthf9436150
ss79.6205.917.77.2
ms8.851.50.50.05
F185.3**1077.9**10.3**
Shoot lengthf9436150
ss175.2155.430.312.5
ms19.638.90.840.08
F234.0**464.6**10.1**
Plant lengthf9436150
ss467.8713.964.226.3
ms52.0178.51.80.17
F296.9**1019.4**10.2**
Seed vigorf9436150
ss3974515.57474770.1514683.3432037.4
ms141612.81868692.51867692.52880.2
F153.3**648.8**4.9**
Tab.1  Variance analysis of studied traits of
PropertiesABA* BError
Germination percentagef9436150
ss30919.417820.83253.81284.750
ms3435.54455.290.48.565
F401.1**520.2**10.5**
Germination speedf9436150
ss1186.9420.846.10.032
ms131.9105.21.30.000
F610594.9**487077.5**5927.4**
Root lengthf9436150
ss282.7691.179.15.5
ms31.5172.82.20.037
F856.3**4710.3**59.9**
Shoot lengthf9436150
ss17.2179.941.51.3
ms1.944.91.10.009
F218.7**5140.1**131.8**
Plant lengthf9436150
ss325.81575.9170.56.3
ms36.2393.94.70.042
F862.6**9388.1**112.9**
Seed vigorf9436150
ss5333000.914803545.51192521.891641.6
ms592555.6592555.633125.6610.9
F969.9**6057.6**54.2**
Tab.2  Variance analysis of studied traits of
Fig.1  Interaction comparison of chemical stimulators and various concentrations on germination percentage of . Significant differences indicated by different letters (<0.05).
Fig.2  Effects of chemical stimulators (A) and allelopathy of (B) on germination percentage of. Significant differences indicated by different letters (<0.05).
Fig.3  Interaction comparison of chemical stimulators and various concentrations on germination speed of . Significant differences indicated by upper-case letters (A, B, etc.) and followed by lower-case letter (a, b, etc.). Significant differences indicated by different letters (<0.05).
Fig.4  Interaction comparison of chemical stimulators and various concentrations on germination speed of . Significant differences indicated by different letters (<0.05).
Fig.5  Interaction comparison of chemical stimulators and various concentrations on root length of . Significant differences indicated by different letters (<0.05).
Fig.6  Interaction comparison of chemical stimulators and various concentrations on root length of . Significant differences indicated by different letters (<0.05).
Fig.7  Interaction comparison of chemical stimulators and various concentrations on shoot length of . Significant differences indicated by different letters (<0.05).
Fig.8  Interaction comparison of chemical stimulators and various concentrations on shoot length of . Significant differences indicated by different letters (<0.05).
Fig.9  Interaction comparison of chemical stimulators and various concentrations on plant length of . Significant differences indicated by different letters (<0.05).
Fig.10  Interaction comparison of chemical stimulators and various concentrations on plant length of . Significant differences indicated by different letters (<0.05).
Fig.11  Interaction comparison of chemical stimulators and various concentrations on seed vigor of . Significant differences indicated by different letters (<0.05).
Fig.12  Interaction comparison of chemical stimulators and various concentrations on seed vigor of . Significant differences indicated by different letters (<0.05).
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