You will be set a research project to be done at home on seed germi...

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You will be set a research project to be done at home on seed germination. You will then be required to write up the results of your research in a standard scientific report (following the guide on the following pages). The aim of this research project is for you to develop your skills in THINKING and WRITING.

Background Information
Seed production commences when the haploid egg nucleus in the embryo sac of an ovule, is fertilised by the haploid male nucleus of a pollen grain forming a diploid zygote, which develops into an embryo. A pollen grain contains 2 sperm nuclei and the second grain fuses with another 2 nuclei from the ovule. This results in a triploid food storage organ the endosperm. The remainder of the ovule develops into the seed coat. The ovary, surrounding the ovule develops into the fruit.

The aim of this research report is for you to investigate the effects of temperature on the germination of seeds of a native wattle species. Your hypothesis or prediction is that a particular treatment or stress will affect germination. Either it will increase, decrease or have no effect on the rate of seed germination.

Treatment or Stress                         Question
Temperature (heat)                         Does temperature affect seed germination?

You need to design and set up an experiment to test your hypothesis on the effects of temperature on seed germination.

Recording the Results
How will you record the germination of treated seeds compared to control seeds?
This is important - we are not interested in growth of the seed - but GERMINATION. What is germination? You will need to find this out. General plant books in the library should provide you with a definition.

Some suggestions are:
1. Number of seeds germinated
2. Time taken to germination

Once you have conducted your experiment you need to write up your report. This should include:
• Title
• Introduction (describing the reasoning for what you did)
• Hypothesis being tested
• Experimental design (remember controls and replicates)
• Results (you can include a figure and/or table)
• Discussion (your interpretation of your results)
• References

Solution PreviewSolution Preview

These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction of bibliographies out of text citations and references. Students may use these solutions for personal skill-building and practice. Unethical use is strictly forbidden.

The Impact of Temperature on the Germination of Seeds of a Native Plant: Heating the Seeds of the Australian Wattle Tree Acacia decurrens. A Scientific Report Assessment

INTRODUCTION
In plants, heat energy is necessary for growth and development of each species and plays a significant role in the reproduction and early stages of growth. An important finding is that after fertilization, plant seeds normally undergo a period of dormancy in which no growth and development takes place. Recently researchers such as Raven, Evert & Eichhorn (2015) have confirmed that during dormancy, the seed does not grow further to ensure that the right conditions are achieved, which gives them adequate time for dispersal. Germination is the process through which the fertilized seeds grow and develop into a seedling (Mackey, 2007). For germination to take place, they require water, oxygen, and temperature. Water is necessary to dissolve the starch and proteins stored in the endosperm and activate the hydrolytic enzymes to break down the stored food resources and initiate germination. Oxygen is necessary in aerobic respiration, the process through which carbohydrates in the endosperm are converted into the necessary energy for germination (Mackey, 2007). The purpose of temperature (heat) is to break the seed coat and provide the necessary heat energy that the hydrolytic enzymes require (Mackey, 2007).

Various studies confirm that in plants, temperatures are needed within a given range, below or above which germination fails to start of stops progression (Merritt, et al., 2007). Most plants germinate and grow within a temperature range of 16-25OC (Merritt, et al., 2007)....

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