It can be suggested that this increased germination rate occurs because the boiling water, by which the seeds were soaked in, breaks down the hard coating on the outside layer of the seed, thus allowing the seedling to penetrate through the coating and begin the germination process. Germination for me is when the radical shows through the seed coat. Therefore of the four seed groups, both Heated 1 & 2 would be subjected to heat treatment process and the Control groups would be used as a standard by which to compare experimental observations. Poor hot water over the seeds and let stand overnight. This would allow for further investigation into the exacting factors and specific limits which affect the seed germination process. By continuing we’ll assume you’re on board with our cookie policy, The input space is limited by 250 symbols. In this instance the heat source was from boiling water, but other heat treatments may also increase this germination rate. Discussion: The results of the experiment demonstrate that if Acacia decurrens seeds are subjected to the heat treatment by placing the seeds in boiling water and leaving them in that same water for a period of 24 hours, then the rate at which the seeds germinate will be affected. Collect ripe seed pods from the tree or shrub. Any floating seeds will not produce seedlings and should be... Next, scarify the seeds. 72hrs| 73%| Control 1| 0| 15| 0| 0| Control 2| 0| 15| 0| 0| Both Heat treated groups 1 & 2 had seeds that germinated within 3-4 days of receiving this heat treatment. Acacia seeds will not usually germinate without the use of a pre-treatment. Oxford Dictionary of Science Fourth ed (2003) Oxford University Press Inc. New York * Dictionary. (1991) Predicting patterns of post-fire germination in 35 eastern Australian Fabacaeae, Australian Journal of Ecology 16, 53-70 * Hill SJ ; French K (2003) Response of the soil seed-bank of Cumberland Plain Woodland to heating, Austral Ecology 28, 14-22(9) * Dictionary. We use cookies to give you the best experience possible. The Acacia genus was susceptible to the slightest change in temperature as it was found that germination was at approximately 98% for the Acacia decurrens at 90 degrees, yet Each Petri dish was covered in a layer of cotton wool, which was moistened with potable water. %PDF-1.5 %���� The hypothesis to be tested is; “If the Acacia decurren seeds are exposed to heat, then the rate at which they germinate will be increased. GI = germination index) were studied. seeds was related to seed development. The Heated 1 & 2 groups of seeds were placed into beakers, and had potable boiling water poured over them. These 4 seed groups were placed into the four separate petri dishes and were titled Heated 1 & 2, and Control 1& 2. Sorry, but copying text is forbidden on this website. Daily observations were recorded in a diary and then placed into a table of results featured below. In the natural environment, the hard coating of the Acacia seeds may be broken down due to a bush fire allowing the plant to begin rejuvenation (Hill & French 2003). com/germination). All four beakers were filled so that the seeds were fully immersed and covered over by the water. The hypothesis to be tested is; “If the Acacia decurren seeds are exposed to heat, then the rate at which they germinate will be increased. Upon germination, I immediately (same day) transfer them into square 4 x 4 x 6.5 mm black plastic pots in a styrofoam tray using my own brew of potting mix. Furthermore, for a more scrupulous analysis of this subject, the experiment performed ideally should be repeated a number of times which include a higher variety of climatic conditions. This experiment will allow children to see how and how many seeds germinate. Pre-sowing treatment included immersion in concentrated. laborlawtalk. Germinated| No. % of the total seeds germinated. We asked Lilli Radley and Taelari White about their … Full physiological development of seeds, indicated by maximum seed dry weight, was reached 82 days after anthesis; however, maximum percent germination was not reached before day 89. References: * Auld, T. D. , O’Connell, M. A. Growing Acacia from Seed First, check that the seed is viable by placing it in water. 538 0 obj <>/Filter/FlateDecode/ID[<839FDD88FAA6904B92CC33B2C3DD2870><3EE44B0D195EC741ABB85ED4D01C044A>]/Index[522 28]/Info 521 0 R/Length 81/Prev 71729/Root 523 0 R/Size 550/Type/XRef/W[1 2 1]>>stream This keeps germination of the control seeds low). This controlled experiment is a simulated example of what might happen during a bushfire, when after the fire is put out most of the vegetation begins to rejuvenate due to the fact that the heat from the fire it self, has increased the rate at which certain seeds including the Acacia Decurrens germinate. Results: Effects of heat on Acacia Decurrens | No. ” (http://encyclopedia. 0 The intention for this experiment was to determine whether the effects of heat increased or decreased the rate at which Acacia decurrens germinated. The remaining 2 Control groups of seeds, were soaked the in same way but soaked in cold water and again left for 24hrs. parameters of five Acacia species (GP = germination percent; GMT = germination mean time (days) and. In order to determine the effects of heat, the experiment needed a control group of non heat treated seeds, and also for the experiment to be duplicated to observe whether it was through the purposeful actions which the seeds were subjected to that may cause germination or whether external or uncontrollable factors also caused the seeds to germinated. endstream endobj startxref 522 0 obj <> endobj • seed of several Acacia species, Grevillea hybrid and one cereal (supplied by Southern Biological (http://www.southernbiological.com/About/AboutUsFrameSet.htm). 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