The effect of long-term salt stress on seed germination, growth, oxidative damage and proline accumulation (original) (raw)
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International Journal of Pharmacy and Pharmaceutical Sciences, 2016
The aim of this investigation was to evaluate the germination response of Vigna mungo, Vigna radiata, Zea mays and Brassica nigra to different stress conditions. Methods: The germination responses of four crops, Brassica nigra, Vigna mungo, Vigna radiata and Zea mays were studied under control conditions in the laboratory. The treatments included three light levels (red, green and white) and dark period for 24 to 48 h, three salinity concentrations (100, 300 and 500 mmol/l sodium chloride), temperature regimes of supra-optimal (35/28 °C), optimal (28/18 °C) and sub-optimal (15/08 °C) and heavy metals (cadmium, lead and nickel) treatments. Results: Best seed germination of all these species was obtained in distilled water (control). The increase in concentration of salinity progressively inhibited the germination in all the selected plants. Light variedly affected seed germination. Seeds were subjected to white light shows the highest germination followed by red light. Darkness has no significant effect on seed germination in all the three plants. The seeds subjected to dark treatment showed better germination as well as a lower antioxidant activity than those subjected to various light conditions. Similarly, the seeds subjected to supra and sub-optimal temperatures shows inhibition were adversely affected with inhibited germination rates. Conclusion: The present investigation reveals that among the four plants, B. nigra showed maximum tolerance against various stress conditions with maximum seed germination.
The Open Agriculture Journal
Background: Seed quality, an important determinant of germination and vigor potential, can be improved through seed priming. This study was therefore aimed at assessing the effects of steeping duration and inoculum concentration on the germination and seedling growth of five seed crops through priming with growth-promoting rhizobacteria. Methods: Broth cultures of five bacterial strains, belonging to Providencia vermicola (2 strains), P. rettgeri (2 strains), and Bacillus cereus (1 strain), isolated from rhizosphere were used for priming in the study. Seeds of cowpea (Vigna unguiculata), soybean (Glycine max), sorghum (Sorghum bicolor), sesame (Sesamum indicum), and okra (Abelmoschus esculentus) were used as experimental materials. To determine the effects of steeping duration, viable seeds of the respective crops were primed with broth cultures of the respective isolates and allowed to stand for a known duration (1, 2, 3, 4, or 5 h). Then, another set of viable seeds was steeped in...
Germination and Seedling Growth of Some Selected Agricultural Crops Under Various Abiotic Stresses
International Journal of Pharmacy and Pharmaceutical Sciences, 2016
Objective: The aim of this investigation was to evaluate the germination response of Vigna mungo , Vignaradiata , Zea mays and Brassica nigra to different stress conditions. Methods: The germination responses of four agricultural crops , Brassica nigra, Vigna mungo, Vigna radiata and Zea mays , were studied under control conditions in the laboratory. The treatments included three light levels (red, green and white) and dark period for 24 to 48 hrs, three salinity concentrations (100, 300 and 500 mmol/L NaCl), temperature regimes of supra-optimal (35/28 oC), optimal (28/18 oC) and sub-optimal (15/08 oC) and heavy metals (Cd, Pb and Ni) treatments. Results: Best seed germination of all these species was obtained in distilled water (control). Increase in concentration of salinity progressively inhibits the germination in all the selected plants. Light variedly affected seed germination. Seeds were subjected to white light shows highest germination followed by red light. Darkness has n...
Seed Science and Technology
Physical treatments of seeds to eradicate pathogens have the risk of reducing vitality of the seeds. Seed lots may differ in sensitivity to these treatments, therefore factors influencing this sensitivity, including the physiological condition of the seeds, should be identified. In this study priming was used to mimic the effect of pre-harvest onset of germination on the sensitivity to these treatments. The effect of humidification, by incubation for one day at 100% RH, followed by drying back, on the sensitivity was also analysed. Primed, humidified and control seeds were subjected to hot water, aerated steam or electron beam treatments at various levels. Two seed lots from Daucus carota (carrot), two seed lots from Brassica oleracea (kohlrabi) and one seed lot from Allium cepa (onion) were used in the tests. Primed seeds from all seed lots were more sensitive to the aerated steam treatment and the B. oleracea and A. cepa seed lots were also more sensitive to the hot water treatmen...
Asian Journal of Research in Agriculture and Forestry
Aims: The application of pre-sowing treatment has greatly improved the germination of seeds of tree species used in afforestation programmes all over the world. This study aimed to determine the effect of different pre-sowing treatments on the germination of Prosopis africana seeds. Study Design: The experiment was laid in a completely randomized design. Place and Duration of Study: This study was carried out from 11th November to 30th December 2019atthe Department of Forestry and Wildlife, Faculty of Agriculture, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria. Methodology: Ten seeds each were soaked in ten treatments: tetraoxosulphate (VI) acid (H2SO4) for 10, 20 and 30 minutes; hot water for 6, 12 and 24 hours; and cold water for 3, 5 and 7 days. Ten seeds from each of the treatments were sown in a germination box containing sterilized river bank sand and each replicated five (5) times. Percentage germinations for each treatment were arcsine transformed, subjected to anal...
Physiological and biochemical basis of pre-sowing soaking seed treatment-an overview
Plant Archives, 2018
The proper germination of a seed in field is a crucial phenomenon because during this period seed has to face various kinds of stresses that may be biotic or abiotic. To get the better performance of seeds in respect to seed germination and healthy seedling establishment of many crops is subjected to various kinds of pre-treatments of seed with water and different chemicals, i.e., Ca (NO3), KNO3, NH4 (SO4)2, NaCl, KCl, KH2PO4, CaCl2 and Mg (NO3)2 in the form of pre-sowing / soaking and seed hardening (hydration/ dehydration) treatment. Study of literature educates that this type of pre-sowing soaking/ hardening treatments improves rate of germination by encouraging the metabolic process in the seed. Therefore, the treated seeds not only reduce the duration of time for seed germination but also improve the post germination phases of plant’s life and finally the yield even under adverse condition because these types of treated seeds are found to be more stress resistant also.
Effects of Pre-sowing Seed Treatments on Germination and Seedling Growth
Abstract Melia dubia Cav. is a species of high medicinal and industrial economic value commonly referred as Malabar Neem Tree. Recently this species is gaining more popularity for its fast growth. The natural germination through seeds is less than 25%. So there is need to find out appropriate pre-sowing treatment. With this information the study was conducted to explore the effects of different seed treatments on germination and seedling growth parameters of a multipurpose plant, Melia dubia in the College of Forestry, Ponnampet nursery during 2010-2011. Seeds were subjected to seven pre-sowing treatments. The results showed that cow dung slurry treatment for seven days had significantly enhanced germination and seedling growth. Seed germination started 32 days after sowing and continued up to 66 days. The highest germination percentage (34.3 %) was observed in the soaking of seeds in cow dung slurry for seven days (T4) followed by (31.5 %) 100 ppm Gibberlic acid for 24 hours (T7). The lowest germination percentage (18.7 %) was obtained from control (T0). The highest germination value (2.2) and germination energy (25) was also obtained in T4, which was significantly (p<0.05) different from the control and other treatments. Shoot length, root length, collar diameter and leaf number followed the same trend of higher value for T4 and T7 respectively. Similar trend was also observed in shoot, root and total seedling dry weight. Therefore, pre-sowing treatment, T4 was more effective in germination and production of quality seedling of Melia dubia in the nursery.
Effect of Seed Treatment on Wheat Seed Viability and Vigour
2018
Use of farm-saved seed without treating encourage accumulation of seed borne pathogens which lead to outbreak and spread of diseases that result in poor emergence, crop stand, vigour, and reduction in yield. This study sought to determine the effect of seed treatment on viability and vigour. Seed samples of wheat varieties NjoroII, Robin and Eagle10 were treated with Murtano super ® (20% Lindane and 26% Thiram), Seedplus ® (10% Imidacloprid, 10% Metalaxyl, and 10% Carbendazim), Monceren ® 125 DS (Imidacloprid 233g/L, Pencycuron 50g/L, Thiram 107g/L.), Rootgard ® , (Trichoderma spp., Bacillus spp., Pseudomonas spp., Aspergillus spp., Chaetomium spp., Esherichia spp., Azorobacter spp.), Achook ® (azadiractin 0.15%EC), Score 250 EC ® (Difenoconazole 250g/L) and Thunder ® (Imidacloprid 100g/L and Betacyfluthrin 45g/L). Untreated seeds were used as control. Germination was carried out on paper towel in the laboratory and on sterilized soil in the green house. Murtano super ® improved germination of NjoroII by 0.5%, Seedplus ® improved germination of Robin by 3.5% while Monceren ® improved germination of Eagle10 by 4%. Score ® and thunder ® suppressed germination of NjoroII, Robin and Eagle10 by more than 50%, 30% and 20% respectively. All the treatments reduced seedling infections significantly. Seedplus, Murtano super and Achook significantly improved vigour indices of NjoroII, Robin and Eagle10 respectively. Seed treatments control seed borne diseases but some suppress germination and vigour. It is necessary to enhance farmers' awareness on the importance of seed treatment in order to improve germination, emergence and vigour and to prevent crop losses.