• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The Effect of Temperature on the Speed of Response of Dionaea muscipula

Extracts from this document...


The Effect of Temperature on the Speed of Response of Dionaea muscipula AIM: The aim of this experiment is to establish whether a relationship between temperature and response times of Venus Flytraps exists. ABSTRACT: The idea for this experiment evolved from doing various readings about nastic movements within plants. However, upon investigation, it was discovered that the Venus Flytrap would be better suited to doing studies on response times as the nastic plants required were not available in Queensland. Dionaea muscipula, common name Venus Flytraps, were placed in various temperatures and artificially stimulated, through the use of human hair, to respond. Five Venus Flytraps were bought, each of which had many small, trigger able traps. The size of the trap indicates whether the trap is able to be triggered or not. The reason for this is covered in the discussion section. One trap from each plant was set off at each of the following temperatures: 20°C, 25°C, 30°C and 40°C. Each of the times were recorded in a table similar to Figure 1. HYPOTHESIS: Due to the catalysing effect of temperature on most chemical reactions, it is foreseeable that the Venus flytrap will close faster when placed in a higher temperature. ...read more.


The neurotransmitters trigger an electrical response in the neuron opposite. This transfer allows for a wide range of movements to be performed by the animal. After extensive research by Paul Simons (1992), it was discovered that the action potentials of plants travel through ordinary cells by means of microscopic membrane pores called plasmodesmata. Animal cells can pass action potentials through in a similar fashion; the pores which allow this to occur are called gap junctions. However, these gap junctions are only used when only one type of movement is required in a particular area. The main difference between animal and plants response is that plasmodesmata can only allow action potentials to travel one way and thus, only one type of movement is possible; in Venus Flytraps, this movement is the closing of the trap. Simons discovered that the actual action potential produced in VFT's is produced through an influx of calcium ions within the trigger hair. This differs from the action potentials of neurons as they are produced by sodium, not calcium. The influx in calcium ions also initiates an efflux of potassium (K+) and chloride (Cl-) ions which are integral in sustaining the action potential as it travels from pore to pore at a speed of approximately 10cm/second. ...read more.


c) The increase in temperature has allowed for a faster influx of calcium ions, thus triggering the action potential faster than what is possible at lower temperatures. d) The increase in temperature has allowed the efflux of potassium and chloride ions to be faster than what is possible at lower temperatures. e) A combination of any or all of the above reasons The fact that the trap is triggered by one touch when the temperature is above 40°C may be a contributing factor to the actual reason. This may be a result of the overall catalysing effect of temperature on chemical reactions and thus, the most likely answer is a combination of c) and d). However, as there are no studies into this directly, it is impossible for a correct final answer to be given at this stage. Further research into acidification and plasmodesmata should be conducted to provide a direct result to this experiment. CONCLUSION: The hypothesis that the plant would respond faster in higher temperatures, proved to be correct. However, whether the catalysing effect of heat on chemical reactions was the only reason for this, could not be established. The history of the Venus Flytraps used may have affected the results. However, the exclusion of the two extreme times from the average means that a fairly accurate time was recorded. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our University Degree Botany section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related University Degree Botany essays

  1. Investigating the inhibitory effect of reserpine on locomotor activity in mice, and its reversal ...

    was 5.20, which is an even greater reduction in comparison to the control mouse (A). The mouse that received L-DOPA performed an average of 52.4 revolutions, which represents a small increase over the average performed by the control mouse (A).

  2. Factors affecting the rate of photosynthesis

    The plant is using the extra CO2 to photosynthesise more. As the plant has more CO2 the limiting factor caused by the lack of CO2 is reduced. This test did produce a big anomaly. The rate for a light intensity of 400 is 5.

  1. The difference in Bracken growth in 2 areas of woodland; one with majority oak ...

    This could explain why the bracken was not able to grow to its full potential because its resources would not allow it, whereas in site 2 there was less competition allowing the bracken to become abundant. I also discovered that the soil of larch woodland has fewer nutrients than that

  2. This investigation aims to determine what effect an increase in the surrounding temperature has ...

    I will now work out the ?. To do this I will need to add the values from the (x-x)�: 0.45 + 0.11 + 0.11 = 0.67 I will now divide the above value by 2 0.67 / 2 = 0.335 To finish the equation I need to now square route 0.335 V0.335 = 0.56 The standard deviation for 53 C is 0.56.

  1. An investigation into the effect of pectinase on fruit juice production from an apple.

    affects the rate at which juice leaves an apple (if you squash a whole apple, you'll get less juice then diced apples). A way I could have got around this problem is to make sure I cut the chunks into certain volumes e.g.

  2. Examination of Protozoan Cultures to Determine Cellular Structure and Motion Pattern

    Using a light microscope, each protist was examined at different magnifications until the best field of view was found for identifying cellular structures. The color, shape, and motion cellular structures was noted. Each of the protists was drawn and the drawings were labeled.

  1. An investigation to find the effect of bile salts on the digestion of fats.

    pH, therefore the initial rate of reaction will not show the change in pH due to enzyme action (see L ) I will record the pH changes on a datalogger, which I can set to record the pH changes in the 10s-40s time interval and compare all the solutions.

  2. Mechanisms of insect resistance induced by treatment of Lycopersicon esculentum seeds by jasmonic ...

    for 50ml catechol solution, 0.255g of catechol in 50ml H2O. Extraction Buffer 2, DOPA and Catalase: For 200ml of 0.1M KPO4 (0.1%SDS) with a pH 7.2, the following were required: 14.34ml 1M K2HPO4 + 5.66ml 1M KH2PO4 + 2ml 10% SDS +178ml H2O.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work