Effects of osmotic priming on seed germination and seedling growth in leek
TL;DR: Priming four seed-lots of leek cultivar ‘Winterreuzen’ in PEG solution significantly improved the rate and uniformity of seed germination, particularly in the slower-germinating lots, in both field and glasshouse conditions.
About: This article is published in Scientia Horticulturae.The article was published on 1984-12-01. It has received 54 citations till now. The article focuses on the topics: Priming (agriculture) & Germination.
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TL;DR: The main objective of this review is to provide an overview of various crops in which seed priming is practiced and about various seed-priming methods and its effects.
Abstract: Plants are exposed to any number of potentially adverse environmental conditions such as water deficit, high salinity, extreme temperature, submergence, etc. These abiotic stresses adversely affect the plant growth and productivity. Nowadays various strategies are employed to generate plants that can withstand these stresses. In recent years, seed priming has been developed as an indispensable method to produce tolerant plants against various stresses. Seed priming is the induction of a particular physiological state in plants by the treatment of natural and synthetic compounds to the seeds before germination. In plant defense, priming is defined as a physiological process by which a plant prepares to respond to imminent abiotic stress more quickly or aggressively. Moreover, plants raised from primed seeds showed sturdy and quick cellular defense response against abiotic stresses. Priming for enhanced resistance to abiotic stress obviously is operating via various pathways involved in different metabolic processes. The seedlings emerging from primed seeds showed early and uniform germination. Moreover, the overall growth of plants is enhanced due to the seed-priming treatments. The main objective of this review is to provide an overview of various crops in which seed priming is practiced and about various seed-priming methods and its effects.
376 citations
Cites background from "Effects of osmotic priming on seed ..."
...Osmopriming with KNO3 improved the rate and generally improved the uniformity of seedling emergence in leek (Brocklehurst et al. 1984), sorghum (Moradi and Younesi 2009) and tomato (Heydecker et al. 1973; Ozbingol et al. 1998)....
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30 Jun 2010
273 citations
TL;DR: In this article, the role of seed priming with ascorbic acid (AsA) in drought resistance of wheat was evaluated, consisting of two independent experiments, and it was shown that osmopriming with AsA significantly improved the leaf emergence and elongation, leaf area, specific leaf area and root length and seedling dry weight.
Abstract: The study, consisting of two independent experiments, was conducted to evaluate the role of seed priming with ascorbic acid (AsA) in drought resistance of wheat. In the first experiment, seeds of wheat cultivars Mairaj-2008 and Lasani-2008 were either soaked in aerated water (hydropriming) for 10 h or not soaked (control). In the second experiment, seeds of same wheat cultivars were soaked in aerated (2 mm) AsA solution (osmopriming) or water (hydropriming) for 10 h. In both experiments, seeds were sown in plastic pots (10 kg) maintained at 70 % and 35 % of water-holding capacity designated as well watered and drought stressed, respectively. Both experiments were laid out in a completely randomized design with six replications. Drought caused delayed and erratic emergence and disturbed the plant water relations, chlorophyll contents and membranes because of oxidative damage; however, root length in cultivar Lasani-2008 was increased under drought. Hydropriming significantly improved the seedling emergence and early growth under drought and well-watered conditions; however, improvement was substantially higher from osmopriming with AsA. Similarly, osmopriming with AsA significantly improved the leaf emergence and elongation, leaf area, specific leaf area, chlorophyll contents, root length and seedling dry weight. Owing to increase in proline accumulation, phenolics and AsA, by seed priming with AsA, plant water status was improved with simultaneous decrease in oxidative damages. These improved the leaf emergence and elongation, and shoot and root growth under drought. However, there was no difference between the cultivars in this regard. In conclusion, osmopriming with AsA improved the drought resistance of wheat owing to proline accumulation and antioxidant action of AsA and phenolics, leading to tissue water maintenance, membrane stability, and better and uniform seedling stand and growth.
158 citations
TL;DR: Modelling results predicted that greater germination enhancement would have been possible at earlier planting dates than were measured in the field experiment, and predictions developed for evaluating potential germination under late winter/early spring soil-temperature regimes were predicted.
102 citations
TL;DR: The results suggest that ACC-dependent ethylene production might be a good indicator of seed vigour; it increases with duration of priming and decreases very early during aging, well before significant loss of seed viability.
Abstract: Sunflower (Helianthus annuus L.) seeds show more germination at high temperatures (25–30°C) than at temperatures below 20°C. Osmopriming with polyethylene glycol-6000 for 3–5 days at 15°C strongly increases germination at suboptimal temperatures. This stimulatory effect of priming persists after seed redrying and during subsequent storage at 20°C (55% RH) for at least 14 weeks. However, primed seeds deteriorate faster than untreated seeds during accelerated aging (45°C, 100% RH). The longer the priming treatment, the higher is the amount of germination but at the same time the higher is the sensitivity of seeds to accelerated aging. Priming enhances the respiratory activity of seeds transferred onto water and their ability to convert 1-aminocyclopropane-1-carboxylic acid (ACC) to ethylene. These effects remain after drying the seeds and are maintained in part during dry storage, whereas they disappear during accelerated aging. These results suggest that ACC-dependent ethylene production might be a good indicator of seed vigour; it increases with duration of priming and decreases very early during aging, well before significant loss of seed viability. Decrease in ACC conversion to ethylene indicates that aging is probably associated with membrane deterioration since in vivo ACC oxidase activity depends on membrane properties. However, no increase in electrolyte leakage is observed during aging.
95 citations
References
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TL;DR: Osmotic potential (psi(s)) of aqueous solutions of polyethylene glycol 6000 (PEG-6000) was curvilinearly related to concentration and increased linearly with temperature.
Abstract: Osmotic potential (ψs) of aqueous solutions of polyethylene glycol 6000 (PEG-6000) was curvilinearly related to concentration. At given concentrations, ψs increased linearly with temperature. The effects of concentration and temperature on ψs of PEG-6000 solutions differ from those for most salts and sugars and apparently are related to structural changes in the PEG polymer. Measurements of ψs with thermocouple psychrometers are more negative than those with a vapor pressure osmometer, with the psychrometer probably giving the more nearly correct ψs for bulk solutions. An empirical equation permits calculation of ψs from known concentrations of PEG-6000 over a temperature range of 15 to 35 C. Viscometery and gravimetric analysis are convenient methods by which the concentrations of PEG-6000 solutions may be measured.
1,677 citations
Book•
01 Jan 1982
TL;DR: In his Friday evening discourse at the Royal Institution on November 3, Sir Arthur Hill discussed the many ingenious devices for the protection of the seed and equally ingenious arrangements for the escape of the embryo on germination, which are found in plants.
Abstract: Provides a comprehensive overview of the physiology, biochemistry and ecology of the process of seed germination. This revised edition includes extended coverage of the influence of molecular biology on seed science and a new chapter on seed technology and propagation.
1,083 citations
TL;DR: The results obtained allowed us to assess the importance of knowing the carrier and removal status of canine coronavirus, as a source of infection for other animals, not necessarily belonging to the same breeds.
Abstract: INTRODUCTION ... . .. ..... .. . ..... ...... ..... .. 195 ALGAE 197 LICHENS .. ....... ...... .... .... . ....... ...... ..... ..... . 199 FUNGI ...... .... ....... ...... .... 204 BRYOPHYTES, PTERIDOPHYTES, AND SPERMATOPHYTES 205 RNA and Protein Synthesis 206 Mosses •......• 206 Seeds 208 Des��cation. oj Germinating .Se�ds and Seedlings 211 'Presowmg drought hardenmg 212 Photosynthesis, Respiration, and Dark Fixation oj CO} 2 1 3 Bryophytes 2 1 3 Vegetative tissues o f vascular plants 2 1 7 Seeds 218 Ultrastructure, Permeability, and Membranes, and the Possible Bases of Desiccation Tolerance 220
566 citations
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