Seed Reserve Utilization and Seedling Growth of Treated Seeds of Mountain Rye (Secale Montanum) as Affected by Drought Stress

Ansari, O.; Chogazardi, H. R.; Sharifzadeh, F; Nazarli, H.

doi:10.2478/v10298-012-0013-x

Cited by 46 publications

(26 citation statements)

References 13 publications

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“…To counteract the adverse effects of abiotic stress, seed priming methods have been applied to improve germination, uniformity, improve seedling establishment and stimulate vegetative growth in more field crops [30,31]. Wheat seeds were priming to increase germination characteristics and stress tolerance.…”

Section: Introductionmentioning

confidence: 99%

Metabolic Processes During Seed Germination

Ali¹,

Elozeiri²

2017

Advances in Seed Biology

125

102

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Seed germination is crucial stage in plant development and can be considered as a determinant for plant productivity. Physiological and biochemical changes followed by morphological changes during germination are strongly related to seedling survival rate and vegetative growth which consequently affect yield and quality. This study is aimed to focus on proceeding of the most vital metabolic processes namely reserve mobilization, phytohormonal regulation, glyoxylate cycle and respiration process under either stressful or non-stressful conditions that may be led to suggest and conduct the more successful experimental improvements. Seed imbibition triggered the activation of various metabolic processes such as synthesis of hydrolytic enzymes which resulted in hydrolysis of reserve food into simple available form for embryo uptake. Abiotic stresses potentially affect seed germination and seedling establishment through various factors, such as a reduction in water availability, changes in the mobilization of stored reserves, hormonal balance alteration and affecting the structural organization of proteins. Recent strategies for improving seed quality involved classical genetic, molecular biology and invigoration treatments known as priming treatments. H 2 O 2 accumulation and associated oxidative damages together with a decline in antioxidant mechanisms can be regarded as a source of stress that may suppress germination. Seed priming was aimed primarily to control seed hydration by lowering external water potential, or shortening the hydration period.

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Section: Introductionmentioning

confidence: 99%

Metabolic Processes During Seed Germination

Ali¹,

Elozeiri²

2017

Advances in Seed Biology

125

102

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“…This index is calculated as the sum of percent germination of seeds at 2 day intervals by the total germination period (Khan & Ungar, 1996). Timson's index is widely used and praised (Brown & Mayer, 1988;Ansari et al, 2012;Dwiyanti et al, 2014) while setbacks to Timson method have also been reported (Al-Mudaris, 1998). He reported with varying examples that different Timson germination indices could still be reached, adding levels of complications and interpretations (Al-Mudaris, 1998).…”

Section: Introductionmentioning

confidence: 99%

A Quantitative Assessment of Germination Parameters: the Case of and

Al-Ansari¹,

Ksiksi²

2016

Open Ecol. J.

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Abstract:The present investigation attempted to assess the impact of seed pre-treatments on the germination of Crotalaria persica (Burm. f.) Merr and Tephrosia apollinea (L) Pers. Equally important was our investigation to quantitatively compare different germination parameters used for seed germination studies. The results showed that the final germination was highest for both species under chipping (CHIP), sand paper (SP) and 20 to 90 minutes in concentrated sulfuric acid (SA20 to SA90). Rubbing in sand (SAND) and water-soaking (SOAK) showed lower germination percentages. Mean germination time (MGT) was highest after 50 minutes in sulfuric acid (SA50) for both C. persica and T. apollinea. The coefficient of velocity of germination (CVG) was highest when seeds were treated with sulfuric acid during 30 minutes (SA30) for C. persica (56.1%) and during 60 minutes (SA60) for T. apollinea (66.8%). For the germination index (GI), chipping and all SA exposures (except 90 minutes) revealed high means for both C. persica and T. apollinea, while SP also resulted in high germination index for C. persica. The mean rate of seed germination was highest under sand rubbing and distilled water (0.9 and 0.8, respectively) for C. persica and under SA20 (1.3), for T. apollinea. The germination rate index (GRI) for C. persica was highest under CHIP, SP, and SA20 to SA60. Timson Germination Index (TGI) showed high values for most pre-treatments.The highest TGI recorded was 45.6% for SA30. As for the correlation between the germination parameters, it is recommended that final germination percent coupled with germination index are used as germination parameters. They do not require complex calculations, while they complement each other in giving a representative evaluation of seed germination.

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“…Germination is basic processes in the survival and success of a plant (Bradford, 2002;Ansari et al, 2012) and the ability to predict germination could enhance crop management. In fact, this distribution has been almost exclusively assumed so far in hydrothermal models (Gummerson, 1986;Bradford, 1990).…”

Section: Resultsmentioning

confidence: 99%

“…The ability to predict the timing of germination of seeds and emergence of seedlings under a range of water regimes is useful for determining seeding date and subsequent seedling establishment success (Mesgaran et al, 2013;Garcia et al, 2013). Osmotic potential is a very important factor controlling seed germination, affecting both the rate and final percentage of germination (Ansari et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Predicting Seed Germination of Safflower (Carthamus Tinctorius) Cultivars Using Hydrotime Model

Tabatabae¹,

Ansari²

2017

Cercetari Agronomice in Moldova

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ABSTRACT.Safflower (Carthamus tinctorius) is a highly branched, herbaceous, thistle-like annual plant. It is commercially cultivated for vegetable oil extracted from the seeds, which is cultivated under arid environments. In such environments, the water needed for germination is available for only a short time and, consequently, successful crop establishment depends not only on rapid and uniform germination of the seedlot, but also on its ability to germinate under low water availability. All of these attributes can be analyzed through the hydrotime model (HT). Safflower seeds were germinated in various polyethylene glycol (PEG 600) solutions to obtain water potentials of 0, -0.2, -0.4, -0.6, and -0. (Ψ b(50) ) for Sina, Faraman, Talaei and Kouseh cultivars were -0.56, -0.67, -0.64 and -0.77 MPa, respectively. Cumulative germination of safflower seed was higher in Kouseh cultivar, than in Sina, Faraman and Talaei cultivars. Results showed that, hydrotime model is suited to predicting seed germination of safflower seeds. In addition, the information gathered with this work allows us to build mathematical models to predict germination of safflower cultivars in the field under various environments.

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Seed Reserve Utilization and Seedling Growth of Treated Seeds of Mountain Rye (Secale Montanum) as Affected by Drought Stress

Cited by 46 publications

References 13 publications

Metabolic Processes During Seed Germination

Metabolic Processes During Seed Germination

A Quantitative Assessment of Germination Parameters: the Case of and

Predicting Seed Germination of Safflower (Carthamus Tinctorius) Cultivars Using Hydrotime Model

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