Abstract:
The problem was to determine the effect of salt water on germinating radish and sunflower seeds, and also to determine if there was a maximum concentration that could be tolerated. The more salt in the water, the fewer seeds will germinate
Introduction:
Plants that reproduce sexually start their life as a seed. seeds are formed when an ovum is fertilised by pollen. The seed has an outer protective coat and a food source that provide energy and nutrients to the growing plant. When the seed receives the correct conditions, usually water, the cell in the seed begins to divide and seed coat splits open. The process by which plants emerge from seeds and spores, and begin growth is called germination.
Background Research
The germination of the seed is when the embryo resumes growth, bursting through its encasing. This coat acts to protect the internal embryo from the elements, parasites and mechanical injury while it is still dormant. Germination can only take place under particular circumstances, involving suitable temperature, oxygen supply, water and sunlight. Some plants can reproduce asexually, or by producing clones. Many other plants produce seeds through sexual reproduction. For these plants, survival depends on germination of seeds and viability of young plants. If a seed germinates in the wrong place or at the wrong time – then life’s over for that individual. We will design and conduct experiments on seed germination to explore the effects of salt in the plant (Seed Germination Lab, 2012).
Aim: To investigate how the percentage concentration of NaCl influence in the seed germination.
Hypothesis
The hypothesis for the experiment is that the seed will not germinate if there is high amount of NaCl.
Controlled-
Acidity - The acidity of the water. Beakers Solution The amount of water goes in.
Materials:
10 x plastic container
25 sunflower seed ( 5 seeds in each container)
25 radish seed ( 5 seeds in each container)
Forceps
Soil
Pipettes
Mineral water
Nacl
Warp plastic
100ml beaker
Sticky labels
Methods:
The first step was to fill the ten plastic container potting soil. Each container contained five radish s and sunflower seed into 10 different containers.
Next spread the seeds around the soil in the plastic container in order to prevent any root tangling by planting them all in one section. Next bury them half way of the soil.
Planted five radish and sunflowers seeds into ten plastic container and tagged name in the side of container.
Measuring cylinder, pipet and 150ml of beaker was rinsed with spring water to reduce the contaminated in that equipment and other pipets, measuring cylinders and 25ml beakers rinsed with 3%, 7% 9%, 10 and 15% sodium chloride solutions. Carefully dry all of them.
Filled the equipment with according solution used them to rinsed. Lightly pour the water over the seeds in a plastic container containing potting soil.
Labelled the container with the sodium content. The plastic container with the seeds on them were placed in lab and observed the number of seed germinated daily (Monday – Friday). Results were recorded daily. Safety:
Need goggles for the salt water splashing in your eyes, and gloves do not transfer bacteria to the seeds.
Sunflower
Table 1: raw data of sunflower each day on different percentage of NaCl
Nacl (acid) Day 2 Day 3 Day 4 Day 7
3% 01 of 5 02 of 5 02 of 5 02 of 5
7% 02 of 5 02 of 5 04 of 5 04 of 5
9% 00 of 5 01 of 5 02 of 5 02 of 5
10% 00 of 5 00 of 5 00 of 5 00 of 5
15% 00 of 5 00 of 5 00 of 5 01 of 5
Radish
Table 1: raw data of radish each day on different percentage of NaCl
Nacl (acid) Day 2 Day 3 Day 4 Day 7
3% 00 of 5 01 of 5 01 of 5 01 of 5
7% 00 of 5 00 of 5 01of 5 01 of 5
9% 01 of 5 01 of 5 02 of 5 02 of 5
10% 00 of 5 00 of 5 00 of 5 00 of 5
15% 00 of 5 01 of 5 00 of 5 00 of 5
Random error
Amount of NaCl
Humidity
Temperature
Systematic error
Sunflower
Radish Discussion:
The effect of salinity (NaCL concentration) on seed germination is shown in Table 1. Low level of salinity (3%) increased germination seed. The seed germination decreased as the level of salinity increased. High levels of salinity inhibit the seed germination significantly.
Bibliography:
Seed Germination Lab, 2012 http://www.amphi.com/media/CMSImport/5FA0EAA6DD294518B2C13425F408CD35.pdf, access date 19th-August- 2013.
Bibliography: Seed Germination Lab, 2012 http://www.amphi.com/media/CMSImport/5FA0EAA6DD294518B2C13425F408CD35.pdf, access date 19th-August- 2013.
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