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2017, African Journal of Agricultural Research
Tropical Plant Research
Effect of various dormancy breaking treatments on seed germination, seedling growth and seed vigour of medicinal plantsThe study was conducted to find out the requirements for seed germination in medicinal plant species v iz. Ashwagandha (Withania somanifera), Sabja (Ocimum pallens), Dawana (Artenisia Pallens), Sonamukhi (Cassia angustifolia) and Wild brinjal (Solanum viarum). The seeds of the above species may be germinated on top of paper(TP) except Ashwagandha, which germinated better in between paper (BP) method. Maximum germination (92%) could be obtained at 20 o C in Ashwagandha seeds while seeds of Dawana showed maximum germination at 30 o C. The seeds of Sonamukhi, Sabja and Wild brinjal showed poor germination due to dormancy. The soaking of seeds in water for 24 h and germinating at 20 o C gave maximum germination in Sonamukhi. The treatment of Seeds with 25% Nitric acid for 10 min. and germination at 30 o C was found ideal for Sabja. For wild brinjal treatment of 12.5% Nitric acid for 15 min. followed by 1000 ppm GA3 for 24 h with alternate temperature of 20-30 is recommended.
Journal of Experimental Biology and Agricultural Sciences
Effects of different pre-treatments and germination media on seed germination and seedling growth of Parkia timoriana (DC.) Merr2017 •
The International Journal of Plant, Animal and Environmental Sciences
Effect of Osmopriming on Seed Germination and Seedling Vigour in Macrotyloma Uniflorum (Lam.) Verd C2016 •
Seeds of Macrotyloma uniflorum, a drought tolerant taxon, were osmoprimed in various concentrations of Polyethylene glycol – 6000 (PEG -6000) ranges from 5% to 25% having water potential of -0.05MPa to -0.73MPa. Percent germination, mean germination time and seedling vigour of one month old were determined to analyze the effect of water stress caused by osmopriming at various concentrations of PEG. Percent germination and MGT of osmoprimed seeds at 5% of PEG were found to be in par with the control. Decline in the percent germination, MGT and seedling vigour was recorded as the concentration of PEG increased. Effect of induced drought by PEG treatments on percent germination, MGT, Germination index and SVI is discussed.
Journal of Research in Forestry, Wildlife and Environment
Effects of four pre-sowing treatment methods (double phase) on the germination of the seeds of Afzelia africana Sm. ex Pers2019 •
The study investigated the effects of four pre-treatment methods on the germination response of the seeds of Afzelia africana (Sm. ex Pers) in the savannah ecozones of Nigeria. The experiment was carried out in two phases. Phase I involved; 50% concentrated sulphuric acid for 10 minutes, hot water at 100oC for 3 minutes, cold water at room temperature for 24 hours, Mechanical scarification (rubbing on abrasive concrete surface). Phase II of the experiment was carried out based on the result of phase I. Mechanical scarification, which performed best among the treatments used in the first phase, was closely examined. The various mechanical scarifications used were rubbing the seeds on abrasive concrete surface to the length of 1mm into the seed coat, 2mm, 3mm and 4mm. The experimental layout used was Completely Randomized Design. For phase I, mechanical scarification had 25% germination rate and had the highest germination compared to other treatments. Due to the performance of mechan...
Journal of environmental biology / Academy of Environmental Biology, India
Effects of some pretreatments on germination of bladder-senna (Colutea armena Boiss. and Huet.) and smoke-tree (Cotinus coggygria Scop.) seeds2008 •
This study was carried out to determine effects of pre-treatments including floating in hot water(100 degrees C) followed by continual cooling for 24 hr in the same water floating in tap water for 24 hr submersion in concentrate (98%) sulphuric acid (H2SO4) and cold stratification for different durations (20, 40 and 60 days) and their combinations on seed germination and to investigate how to overcome dormancy of seeds of Colutea armena Boiss. and Huet. and Cotinus coggygria Scop. The seeds were sown in polyethylene pots in the greenhouse and on seedbeds under open field conditions. The statistical design was a randomized complete block design with three replications. The highest germination percentage (77.19%), the best germination rate (16 days) and the highest growth rate (69.01%) were obtained from Colutea armena seeds that were submersed in sulphuric acid for 30 min and sown in the greenhouse. The pre-treatment of submersion in sulphuric acid for 20 min with cold stratification...
Acta Horticulturae
Effects of Maturation and Scarification on Seed Germination of Syagrus Schizophylla (MART.) Glass. (Arecaceae)2005 •
European Centre for Research Training and Development UK (European Journal of Botany Plant Sciences and Pathology)
PRE-GERMINATION AND DORMANCY RESPONSE OF ADANSONIA DIGITATA L SEEDS TO PRE-TREATMENT TECHNIQUES AND GROWTH MEDIA2014 •
The study investigated the effects of three pre-treatment techniques and growing media the dormancy and growth response of baobab seeds. The seeds were immersed in cold water (25-28oC), hot water (100oC), and sulphuric acid (10%, 50% and 98% conc. levels) at different time intervals. The seeds after pre-treatment were sown on three different growth media. Randomized Complete Block Design with 3 treatments and 3 germination media was adopted for this experiment. The result showed that earliest mean days of emergence (8days) was observed in seeds subjected to acid treatment at 98% conc. The highest (17 seeds) rate of germination was recorded in 98% acid conc. soaked for 1h and sowed in sandy soil growth medium with high significant variation. 98% acid conc. recorded the highest germination percentage ranging from 62% - 85%, while other treatments recorded a lower germination percentage (5% to 40%). Sandy soil growth medium showed significant effect in 98% acid treatment soaked for 1hr. The sawdust gave significant germination effect for hot water treatment. Thus, 98% acid concentration soaked for 1h and sowed in sandy soil growth medium was recommended for pretreatment of Adansonia digitata seeds prior to planting to improve germination performance.
PLANT SCIENCE TODAY
Effect of physical and chemical treatments on breaking the seed dormancy of Caesalpinia bonduc (L.) Roxb2021 •
Caesalpinia bonduc (L.) Roxb. is a medicinal plant belonging to the family Caesalpiniaceae was used for the present study. It is a prickly shrub widely distributed all over the world. Keeping the economic and social medicinal uses of C. bonduc seeds are being used widely in Folk, Ayurvedha, Siddha, Unani medicines to treat skin disease, eyesores, cancer, asthma, tuberculorosis, fever, toothaches etc. The aim of this study is to determine the requirements for breaking seed dormancy and germination of C. bonduc. The germination is prevented due to hard seed coat. C. bonduc seeds were experimented with various physical and chemical treatments to break the dormancy. The seeds were subjected to various treatments like mechanical scarification, dry heat method, light, hot water, acid scarification, inorganic compounds, plant growth regulators etc. The seeds treatment with mechanical scarification at 50, 40 and 30 seconds showed 100%, 80% and 10% of germination, whereas no changes was observed in dry heat. White light treatment showed 100% germination at 48 hrs, whereas darkness and red light showed least germination of about 10%. The hot-water treatment showed 100% germination. In chemical treatments, concentrated sulphuric acid scarification showed highest germination percentage, whereas lowest germination was found in nitric acid. Among the plant growth regulators, Gibberellic acid showed 100% germination whereas 2-isopentyl adenine showed least germination of 10% at 50 ppm. Results of this study prove that mechanical scarification was the most effective treatment to overcome dormancy of seeds in C. bonduc.
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