Mahmood Abadeh; Malihe Sadeghi Bahmani; hamed hasanzadeh khankahdani; Maryam yektankhodaei
Abstract
This experiment was conducted as a factorial based on a completely randomized design with four replications and the first factor was Culture medium with two levels: laboratory and Greenhouse, and the second factor was seed pre-treatment with five levels: Control, Leaching for 12 hours, Leaching for 12 ...
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This experiment was conducted as a factorial based on a completely randomized design with four replications and the first factor was Culture medium with two levels: laboratory and Greenhouse, and the second factor was seed pre-treatment with five levels: Control, Leaching for 12 hours, Leaching for 12 hours and Soaking in gibberellic acid for 12 hours, Scarification with sandpaper and Scarification with sandpaper and Soaking in gibberellic acid for 12 hours. The results showed that in Greenhouse vegetative traits of plumule length (78.6 mm), radicle length (109.34 mm), seedling dry weight (102.7 mg), allometric coefficient (0.72) and seedling vigour (95) were higher than the laboratory (p<0.05). The results also showed that leaching and soaking in gibberellic acid pre-treatment increased indices and traits germination rate (5.56), mean daily germination (1.9), peak value (2.48), germination value (6.1), plumule length (61.9 mm), radicle length (86.1 mm), seedling dry weight (82.2 mg) and seedling vigour (94.3) (p<0.05). This pre-treatment also reduced day to beginning germination index (5.6) (p<0.05). The results of mean comparison of the interaction effect of Culture medium and Pre-treatment showed that in Greenhouse leaching and soaking in gibberellic acid pre-treatment reduced day to beginning germination index (4.2) and increased vegetative traits of plumule length (93 mm), radicle length (129.2mm), seedling dry weight (120.8 mg) and seedling vigour (124.9) (p<0.05).
maryam Boroujerdnia; hamed hasanzadeh khankahdani
Abstract
This study evaluated different methods of improving seed germination in tamarind (Tamarindus indica L.). The experiment was laid out in a completely randomized design and each treatment was replicated four times. Treatments were consisting of distilled water for 24 h at ambient temperature, hot water ...
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This study evaluated different methods of improving seed germination in tamarind (Tamarindus indica L.). The experiment was laid out in a completely randomized design and each treatment was replicated four times. Treatments were consisting of distilled water for 24 h at ambient temperature, hot water 80 Ċ for 5 min, potassium nitrate (KNO3) at 1 and 2% for 24 h, sulphuric acid (98% H2SO4) for 5 min, sulphuric acid (50% H2SO4) for 10 min and control (seeds were not treated). Results showed that the greatest percentage and speed germination and was observed in treatment of sulphuric acid (98% H2SO4) for 5 min. The lowest Mean time to germination was obtained in sulphuric acid (98% H2SO4) for 5 min followed by potassium nitrate at 1% . Maximum seed vigour index was observed in sulphuric acid (98% H2SO4) for 5 min that had no had no significant difference with sulphuric acid (50% H2SO4) for 10 min and potassium nitrate (1 and 2%) for 24h. pre-treatment of distilled water and hot water were not effective in improving seed germination of tamarind. The highest number leaf, length of shoot and root, fresh and dry weight of stem and root was observed in potassium nitrate at 1% for 24h followed by potassium nitrate at 2%. Therefore, the results showed that pre-treatment of seed with potassium nitrate 1% for 24h is effective way to improve seed germination and early growth of tamarind.
