• 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...

Introduction

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.

Middle

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.

Conclusion

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. Agricultural Wastes Research

    basic elements of sustainability: social progression, technical and technological improvements, environmental protection and economical development. (El-Haggar et al., 2000) Agricultural waste, when properly used, can be a valuable addition to a farming operation's resource system. It can be an excellent fertilizer and will improve soil characteristics by adding organic matter.

  1. 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.

  2. Demonstrate the separation of plant pigments using chromatography and the rate of photosynthesis in ...

    As DPIP was reduced, the percent of transmittance increased as more light was able to go through the solution.

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

    the below part of the equation I can now work out the figure for below part of the equation. To do that I will need to minus the number of readings by 1 which is: 3-1 = 2. I will now work out the ?.

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

    When I weighed my apples, the scales were accurate to 2.d.p which is very accurate. My results were fairly reliable but not entirely. I did not repeat the experiment which could have lead to me not spotting anomalous results. Also the surface area of the apples is a factor which

  1. Investigation Into the effect of pectinase on apple juice extraction.

    Evaluation Although our experiments where conducted with the up most of care I am positive there was some room for improvement. There were a number of sources for error the biggest of which being the number of times the experiment was repeated.

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

    I can conclude that there is a significant difference between bracken growth in the two areas, but this was not proven to be due to the light intensity as there wasn't a significant correlation between the two. I feel that if the experiment could have been done at the same

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