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Publication Type J
Authors Masoudi, P; Gazanchian, A; Azizi, M
Author Full Name Masoudi, Purya; Gazanchian, Ali; Azizi, Mehdi
Title Improving emergence and early seedling growth of two cool season grasses affected by seed priming under saline conditions
Source AFRICAN JOURNAL OF AGRICULTURAL RESEARCH
Language English
Document Type Article
Author Keywords Early seedling growth; emergence rate; seed priming; salinity stress; cool-season grasses
Keywords Plus SALT-TOLERANCE; GERMINATION; WATER; PLANT; STRESS; TOMATO; CALCIUM; MAIZE; L.; MECHANISMS
Abstract Soil salinity threatens initial stages of emergence and early seedling growth in cool season grasses, although it may be tolerant in its adult stages. Today, seed priming has been known as an effective technique for improving seed germination, seedling vigor, and emergence rate and seedling establishment under different environmental stresses. A pot experiment was conducted to evaluate osmopriming effects in ameliorating emergence rate (ER) and final emergence percentage (FEP), seedling growth, Na(+) and K(+) accumulated in shoot at early growth stages of two cool season grasses including tall wheat grass (Agropyron elongatum Host.) and bulbous barley (Hordeum bulbosum L.) when seeds were imbibed with CaCl(2), -1.5 MPa, and NaCl, -1 MPa for a duration of 2 and 5 days respectively, in response to seven salinity concentrations of NaCl (0, 50, 100, 150, 200, 250 and 300 mM) under greenhouse conditions. With increasing salinity levels, ER and FEP and seedling growth were significantly decreased in both grasses for primed and non-primed (control) seeds (p < 0.01). But under severe salinity stress (300 mM) seed priming improved with regards to ER, FEP, accumulation of Na(+), Na(+):K(+) ratio in shoot, root dry weight, shoot dry weight, root length and shoot length 62.6, 30.5, 44.7, 34.8, 42.5, 43.7, 31.7 and 20.9% when compared with non primed seeds, respectively. The relationships between salinity levels and ion accumulation showed that there was no significant correlation between Na(+) accumulated in shoot and shoot dry weight in primed seeds (r = -0.15, P > 0.05) but for non-primed seeds increasing the accumulation of Na(+) in shoot, led to significant decline (r = -0.62, P < 0.01) of shoot dry weight. The results suggest that seed priming could significantly improve the threshold value especially for FEP in both grasses under different levels of salinity. Also, it seems that seed priming could better improve root and shoot growth at early seedling growth stage perhaps by decreasing toxicity of Na+ concentration and adjusting Na(+) and K(+) ratio under saline conditions.
Author Address [Gazanchian, Ali] Agr & Nat Resources Res Ctr Razavi Khorassan, Dept Genet & Physiol, Mashhad, Iran; [Masoudi, Purya] Payam e Noor Univ Bodjnord, Dept Agron, Tehran, Iran; Agr & Nat Resources Res Ctr Razavi Khorassan, Dept Crop Sci, Mashhad, Iran
Reprint Address Gazanchian, A (reprint author), Agr & Nat Resources Res Ctr Razavi Khorassan, Dept Genet & Physiol, POB 91735-1148, Mashhad, Iran.
E-mail Address gazanchian@kanrrc.ac.ir
Funding Agency and Grant Number Islamic Azad University of Bodjnord in Iran
Funding Text Special thanks to Islamic Azad University of Bodjnord in Iran for funding and the Agricultural and Natural Resources Research Center of Northern Khorassan for providing seeds.
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Cited Reference Count 50
Total Times Cited Count (WoS, BCI, and CSCD) 1
Publisher ACADEMIC JOURNALS
Publisher City VICTORIA ISLAND
Publisher Address P O BOX 5170-00200 NAIROBI, VICTORIA ISLAND, LAGOS 73023, NIGERIA
ISSN 1991-637X
29-Character Source Abbreviation AFR J AGR RES
ISO Source Abbreviation Afr. J. Agric. Res.
Publication Date JUN 4
Year Published 2010
Volume 5
Issue 11
Beginning Page 1288
Ending Page 1296
Subject Category 9
Document Delivery Number Agriculture, Multidisciplinary
Unique Article Identifier Agriculture
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