Effects of Priming Techniques on Seed Germination and Early Growth Characteristics of Bromus tomentellus L. and Bromus inermis L.

Abstract

Seed priming is known as a seed treatment which improves seed performance under environmental conditions. Objective of this study was to evaluate the effects of different priming treatments on seed germination behaviour of two genotypes of Bromus under laboratory conditions to find out the most effective priming treatment. Seeds were treated with the following seed-soaking media: (i) unsoaked seed (control); (ii) hydropriming with distilled water for 4, 8, 12 and 16 hours, (iii) osmopriming treatments with PEG 6000 for Bromus tomentellus were -0.6, -0.8, -1.0 and -1.2 MPa osmotic potentials with duration of 12, 24 and 36 hours and for Bromus inermis osmoticpotentials were the same as B. tomentellus but duration of priming treatments was soaking seeds for 12, 24, 36 and 48 hours. Seeds of both genotypes were placed in liquid priming media at 25ºC. Priming treatments significantly affected germination vigour of both genotypes. The response of both genotypes to different priming techniques approximately was similar. Osmopriming treatment (-0.6 MPa and 12 h) increased final germination percentage of B. tomentellus. Priming treatments increased coleoptile length significantly comparing to control but hydropriming for 4 h exhibited longer coleoptile than others. Higher vigour index was observed in hydropriming for 12 h but this difference was not significant with osmoprime treatment (12 h-0.6 Mpa). B. inermis produced more germinated seeds and vigourous seedlings than B. tomentellus but germination rate was higher in B. tomentellus.

Effect of Seed Priming on Germination, Plant Growth and Flowering of Cockscomb (Celosia spp.) Under Prayagraj Agro Climatic Conditions

“…Rubio-Moraga et al [27] stated that the role of Salicylic acid is attributable to improve vegetative growth and that lead to an increase in the absorption of nutrients, also it promotes photosynthesis in plant that lead to carbohydrate manufacturing which affected clearly in the differentiation of flowers and increased their number. Salicylic acid also involve in Auxin increasing, which enhance flower growth, whereas the elongation of vase life due to Salicylic acid role as an ethylene biosynthesis inhibitor that blocks the induction effect of ethylene on ACCoxidase (1-aminocyclopropane-1-carboxylic acid) activity inhibition and consequently a delaying in flower senescence's symptoms occur and the results are in accordance with Tavili et al [22].…”

“…Significantly, the number of leaves per plant was high in T₅ (salicylic acid 0.04%) (47.44), followed by T₈ (salicylic acid 0.06%) (46.11), and whereas the lowest number of leaves was found in the T₇ (CaCl2 6%) (36). More number of leaves per plant might be due to the fact that predenied division and enlargement of central cell in the leaf axis would be possible due to morphactin like salicylic acid as stated by Tavili et al [22]. The exogenous application of Salicylic acid had effect on increased photosynthetic activity and cell division which enhances the number of leaves per plant.…”

“…Whereas the minimum days taken to flowering was recorded in the treatment 7 (CaCl2 6%) (25.44). The abundant supply of mineral nutrients was directly involved in the protoplasmic constituents and accelerates the process of cell division and elongation which in turn resulted in increased days to flowering as stated by Tavili et al [22] and Pahoja et al [21] said that higher number of flowers per plant might have been possible due to more vigor and strength attained by the plant as a result of better photosynthetic activities with sufficient availability of nutrients from the seed treatment during the growth stages. The results are in acceptance with Mavi et al [20].…”

Salinity Stress in Wheat: Effects, Mechanisms and Management Strategies

“…The positive effects of seed priming can be due to the availability of adenosine triphosphate (ATP), enzymatic activation, and de-novo synthesis of some substances that promote germination [219]. Seed priming is a reliable, simple, inexpensive, and low-risk technique [220,221]. Various priming techniques such as hydro-priming (soaking the seeds in water), osmo-priming (soaking the seeds in nutrient, hormone, or chemical solutions), and halo-priming (soaking the seeds in a salt solution) have been developed to increase the speed of germination, seedling establishment and crop production [222].…”

Encapsulation Efficiency, Microstructur and Oxidation Stability of Fish Oil Encapsulated Powder Made by Using whey Protein Concentrate

“…Hardening has been reported to be effective treatment in the enhancement of germination, emergence, mean germination time, seedling vigor of two rice (Oryza sativa) cultivars (Farooq et al, 2004). Hardening has also resulted in the enhancement of final germination and germination rate of bay wood (Guazuma ulmifolia) (Brancalion et al, 2010), two varieties of parsley (Petroselinum sativum) (Podlasky et al ,2003), as well as seedling vigor of rice (Barsa, et al ,2003, Farooq et al, 2006a, and wooly brome(Bromustomentellus) and smooth brome (B. inermis) (Tavili et al, 2010). In addition, hardening is found to be effective in obtaining a healthy crop and increasing salt tolerance of wheat (Triticumae stivum) (Barsa et al, 2005), of mustard (Brassica juncea) (Bharti and Malik 2013) and four coriander cultivars (Coriandrum sativum) (Ben Fredj et al, 2013) and improving drought tolerance of several crops (Hanson 1973,Khan 1992, Halmer 2004, Matsushima and Sakagami 2013.…”