The effect of germination temperature on seed dormancy in Croatian-grown winter wheats

Ikić, Ivica; Maričević, Marko; Tomasović, Slobodan; Gunjača, Jerko; Šatović, Zlatko; Šarčević, Hrvoje

doi:10.1007/s10681-012-0735-8

Cited by 26 publications

(9 citation statements)

References 13 publications

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“…Other characteristics such as germination rate and percentage and seed vigor index were evaluated as following. Germination percentage was estimated using the formula (Ikić et al, 2012): GP= (number of germinated seeds/total number of seeds) ×100 Germination rate (GR) is also calculated as follows: GR=Ʃ(G t /D t ) where G t is the number of germinated seed on day t and D t is the number of days after seed treatment when the germinated seeds were counted (Kalsa and Abebie, 2012). Additionally, vigor index was calculated using formula: SV = (HL+RL) ˟ GP where SV is seed vigor index, RL is radicle length, HL is coleoptile length and GP is germination percentage (Abdul Baki and Anderson, 1973).…”

Section: Estimation Of Seed Germination Attributed Traits and Seedlinmentioning

confidence: 99%

Evaluation of ACC deaminase producing Pseudomonas fluorescens strains for their effects on seed germination and early growth of wheat under salt stress

Safari¹,

Jamali²,

Nooryazdan³

et al. 2018

Aust J Crop Sci

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Plant growth-promoting rhizobacteria possessing ACC deaminase activity reduces the level of stress ethylene, conferring resistance and improving plant growth under different stress conditions. The present study aims at evaluating Pseudomonas fluorescens strains for their potential to produce ACC deaminase and quantifying their effects on seed germination and seedling growth of wheat under salinity stress. Bacteria were first evaluated for their ability to utilize ACC, an immediate precursor of stress ethylene, using DF minimal medium containing 3 mM ACC and it was revealed that they were all able to use ACC as sole nitrogen source under in vitro conditions. Thereafter, the influence of bacterial strains on seed germination and seedling growth of wheat varieties was evaluated under NaCl induced salt stress after seven days. The experimental design was completely randomized in 3×5×5 factorial scheme with three replications. Factors consisted of salinity (0, 3 and 6 dS/m), P. fluorescens bacteria (strains PGU2-79, WBO-3, WKZ1-93 and WB1-7 and sterile water as control), and wheat variety (Chamran, Kooh-Dasht, Dehdasht, Karim and Jam). Twenty wheat seeds were transferred to plates after being soaked for an hour in bacterial suspensions at concentration of 10 8 CFU/ml. Each plate contained a filter paper which was moistened with 10 ml of NaCl solution in different concentrations. Plates were incubated in a growth chamber with maximum and minimum temperatures maintained at 20°C and 15 °C, respectively, with 12 h day-night photoperiod and relative humidity of 80%. Results revealed that P. fluorescens strains had positive impacts on different growth parameters of wheat varieties including germination percentage and rate, seed vigor, length and dry weight of coleoptile and radicle and salinity tolerance index of plants under salinity stress as compared to control. This study reveals the efficacy of plant growth promoting P. fluorescens strains containing ACC deaminase for improving salt tolerance and consequently stimulating the growth of wheat seedlings under salinity stress.

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Section: Estimation Of Seed Germination Attributed Traits and Seedlinmentioning

confidence: 99%

Evaluation of ACC deaminase producing Pseudomonas fluorescens strains for their effects on seed germination and early growth of wheat under salt stress

Safari¹,

Jamali²,

Nooryazdan³

et al. 2018

Aust J Crop Sci

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“…The temperature effect on seed dormancy is also highly conserved in different species. In wheat, it was reported that higher temperature during seed set time reduces dormancy, and lower temperature during seed germination breaks seed dormancy (Reddy et al, 1985; Nyachiro et al, 2002; Nakamura et al, 2011; Ikić et al, 2012). Though no significant difference was observed in seed dormancy between different temperatures within one accession during seed set period, the pattern that elevated temperature during seed maturation reduces the seed dormancy appears clear (Figure 4A).…”

Section: Discussionmentioning

confidence: 99%

The Effect of Ambient Temperature on Brachypodium distachyon Development

et al. 2019

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Due to climate change, the effect of temperature on crops has become a global concern. It has been reported that minor changes in temperature can cause large decreases in crop yield. While not a crop, the model Brachypodium distachyon can help to efficiently investigate ambient temperature responses of temperate grasses, which include wheat and barley. Here, we use different accessions to explore the effect of ambient temperature on Brachypodium phenology. We recorded leaf initiation, heading time, leaf and branch number at heading, seed set time, seed weight, seed size, seed dormancy, and seed germination at different temperatures. We found that warmer temperatures promote leaf initiation so that leaf number at heading is positively correlated to temperature. Heading time is not correlated to temperature but accessions show an optimal temperature at which heading is earliest. Cool temperatures prolong seed maturation which increases seed weight. The progeny seeds of plants grown at these cool ambient temperatures show stronger dormancy, while imbibition of seeds at low temperature improves germination. Among all developmental stages, it is the duration of seed maturation that is most sensitive to temperature. The results we found reveal that temperature responses in Brachypodium are highly conserved with temperate cereals, which makes Brachypodium a good model to explore temperature responsive pathways in temperate grasses.

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“…The number of germinated seeds was counted every 24 h for six days. At the end of the test, germination percentage (GP) expressed as (Total seeds germination after day 6 / Total number of planted seeds) × 100 (Ikić et al 2012). Germination index (GI) was expressed as (% germination × % root length of seeds germination)/100) (Zucconi et al 1981).…”

Section: Seed Treatmentsmentioning

confidence: 99%

Responses of Two Barley Subspecies to In vitro-Induced Heavy Metal Stress: Seeds Germination, Seedlings Growth and Cytotoxicity Assay

Nouri

Rasafi

Haddioui

2019

Agriculture (Pol'nohospodárstvo)

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In this work three heavy metals: cadmium (as CdSO4), cobalt (as CoCl2) and zinc (as ZnSO4), were used to determine and compare their toxicity towards two subspecies of barley (Hordeum vulgare subsp. vulgare L. and Hordeum vulgare subsp. distichum L.), focusing on seeds germination, seedlings growth, and cytological parameters. The results indicate that the effect of these heavy metals depends on the metal kind, the metal concentrations and the plant subspecies. Generally, in the case of H. vulgare, the heavy metal salts understudy did not influence significantly seed germination and seedling growth parameters. However, these metal salts influence significantly these parameters for H. distichum. The cytological test showed significant decrease (p < 0.05) in the mitotic index among the increase of the heavy metal concentrations when evaluated with the control for H. vulgare and H. distichum. Consequently, H. vulgare seemed to be more tolerant of the increase of the three heavy metals concentrations than H. distichum.

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The effect of germination temperature on seed dormancy in Croatian-grown winter wheats

Cited by 26 publications

References 13 publications

Evaluation of ACC deaminase producing Pseudomonas fluorescens strains for their effects on seed germination and early growth of wheat under salt stress

Evaluation of ACC deaminase producing Pseudomonas fluorescens strains for their effects on seed germination and early growth of wheat under salt stress

The Effect of Ambient Temperature on Brachypodium distachyon Development

Responses of Two Barley Subspecies to In vitro-Induced Heavy Metal Stress: Seeds Germination, Seedlings Growth and Cytotoxicity Assay

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