University of Khartoum

The Effect Of Growing Media And Temperature On Seed Germination And Seedling Growth Of Guddaim (Grewia Tenax Forsk) Fiori

The Effect Of Growing Media And Temperature On Seed Germination And Seedling Growth Of Guddaim (Grewia Tenax Forsk) Fiori

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Title: The Effect Of Growing Media And Temperature On Seed Germination And Seedling Growth Of Guddaim (Grewia Tenax Forsk) Fiori
Author: Neda Salah Eldin Ibrahim Adam
Abstract: Grewia tenax, "Guddaim", is used in traditional medicine, as a famine food. Three experiments were conducted to evaluate the effect of growing media and temperature on germination and seedling growth of Grewia tenax. Experiment 1 investigated effect of growing media, and temperature, on germination percentage of Grewia tenax. The results showed that peat moss resulted in the highest germination%, shoot length, fresh weight and dry weight followed by sand, river silt and then sand and river silt mixture. Sowing date showed no effect on germination percentage . On the other hand, the interaction between growing media and sowing date showed a significant difference. The study showed that river silt had given a high shoot length followed by river silt + sand mixture and peat moss, respectively. There was significant difference between river silt and river silt + sand mixture when compared with sand. The late sowing date increased shoot length significantly when compared with early sowing date but no significant difference was obtained with regard to the interaction. Peat moss gave the highest fresh weight followed by river silt, river silt + sand mixture and sand, respectively. Also early sowing date resulted in high fresh weight. The peat moss gave a high dry weight followed by sand, river silt and river silt + sand mixture but no significant difference was recorded besides a high dry weight and significant difference between late and early sowing date was recorded. Interaction between growing media and sowing date gave a significant difference. There was a significant difference between river silt, river silt + sand mixture and sand concerning the number of leaves which was produced by late sowing date. Experiment 2 was planned to examine the effect of temperature on germination percentage, germination rate, shoot length, fresh weight, dry weight and number of leaves. It was found that the increase in temperature significantly decreased germination %. The temperature 25°C caused a high germination rate while 35°C gave a low germination rate. The shoot length and fresh weight were decreased gradually by increase in temperature. 35°C fresh weight was significantly decreased at 35°C when compared with 15°C and 25°C. The dry weight was significantly higher at 15°C than 35°C and the number of leaves gradually decreased by increasing temperature. Experiment 3 was designed to investigate the influence of temperature fluctuation on germination %, germination rate, shoot length, fresh weight, dry weight and number of leaves. It was found that high temperature affected all parameters studied except germination percentage. The dry weight was statistically significant and the number of leaves was highly significant.
URI: http://khartoumspace.uofk.edu/handle/123456789/12122
Date: 2015-06-14


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