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

What are the best conditions for the germination of mung beans?

Extracts from this document...

Introduction

What are the best conditions for the germination of mung beans? Purpose: To determine the optimum temperature mung beans germinate at Hypothesis: The mung beans placed at 27�C will germinate more efficiently (in terms of number of beans germinated after a set time frame) in comparison to beans placed at other temperatures. Reason: In Asia, bean sprouts put in Chinese cuisine (which come from the mung beans) are usually grown at a warm temperature of 30-35� for longer, thicker sprouts, so although the beans would germinate at 40�, this temperature would probably start to denature the enzymes. Equipment: Cotton, Balance, Labels, Incubator, Distilled water, 25 ml Measuring cylinder, 5 Petri dishes Variables: Independent Variables: - Temperature Dependent Variables: - Adequate partial pressure of oxygen - Supply of light - Amount of water - Number of beans - Mass of cotton Procedure: 1. Used a balance to measure 1.5g of cotton 2. Spread cotton wool evenly around the base of the Petri dish 3. Carefully spread 8 mung beans in the centre of the Petri dish so that each was roughly 1cm apart 4. Measured 20 ml of tap water into the 25 ml measuring cylinder 5. Poured water onto the surface of the cotton and beans 6. Covered the Petri dish with its lid 7. Repeated steps 1-6 four more times 8. Without repeating, labeled each dish with one of the five temperatures: -4�, 18�, 25�, 40�, 60� 9. ...read more.

Middle

Day 3: All beans have sprouted in the 27� and 40� dishes, with hypocotyls, epicotyls, and roots growing rapidly. Seeds have become epigeal and photosynthetic, and have undergone photomorphogensis where they begin to make chlorophyll and turn green. The hypocotyl has elongated forming a hook, straightening and pulling the cotyledons and shoot tip into the air, and it appears that the cotyledon and apical hook have unfolded, revealing the epitcotyls and foliage leaves. In the 27� dish, the hypocotyls and epitcotyls are straight and long, with healthy light green foliage leaves and a tangle of main roots and side roots entwined in the cotton with no sign of the testa. A similar result can be observed in the 40� dish, however, hypocotyls are white and bent, and less side roots are present. Foilage leaves are light yellow, while the leave casings loosely cover the shoot tips. Beans that were placed in -18� still have not germinated at all, and maintained the same appearance. Likewise, none have germinated in 60� either, and the cotton surface has turned yellow. The beans have turned brown, and expanded, but they have a shriveled testa with a white milky solution covering it. In the Petri dish at 4�, there was no change from Day 2's observations, no seeds have germinated, but all seeds have turned a light green color, while their hilums have all turned white from its original color, black. ...read more.

Conclusion

The way the mung beans had sprouted at 27� also support my hypothesis, as the sprouts were healthy, straight, long, and green in the 27� dish, while in the 40� dish, they were bent, yellow, and short. If I were to repeat this experiment again, I would use distilled water instead of tap water. The tap water may have contained certain minerals and chemicals that could have increased or decreased the rate of germination. However, as the intervals of the tested temperatures were so far apart, the results would not have varied in terms of the order of the highest germinating dishes. But, if the testing temperatures were closer together, the optimum temperature that mung beans germinate at might not have been accurate. Furthermore, in the analysis of the results I mentioned that light might have altered the results, so to improve this experiment next time, I would put the room temperature Petri dish in a dark place to make this investigation more fair. I would also conduct another experiment, like this one, with closer intervals in the testing temperatures between room temperature and 40� to gather a more concise result for the optimum temperature mung beans will germinate at. Another experiment I would conduct in conjunction with this investigation, is one that would analyze the effects light, water, oxygen concentration, chemicals, different soils, and the number of beans in a confined area has on the rates of germination. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms 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 GCSE Green Plants as Organisms essays

  1. Marked by a teacher

    An investigation into the effect of a germination inhibitor on the germination of seeds.

    3 star(s)

    in the endosperm of the seed embryo into simpler water soluble sugars. The embryo meristem tissues use the energy from these sugars to begin cell division and the seed then sprouts. Some inhibitors induce dormancy in the embryo therefore not allowing this to happen (this is mentioned below).

  2. Conditions for germination

    Oxygen is needed for aerobic respiration. Although seeds can respire anaerobically, but ethanol produced usually reaches toxic level. The production thus inhibits the germination process. Thus, oxygen is needed to allow germination to occur. In experiment 3, the seeds in the most suitable temperature of 30�C are the ones that germinate the fastest with significant radical plumule.

  1. Factors affecting Germination

    Place 3-5 seeds in each pot. This is because not all of the seeds will germinate successfully and planting multiple seeds works to ensure that at least one will germinate 3) Cover with 5mm of vermiculite 4) Lightly water until all vermiculite in the pot is moist 5)

  2. We have been told to germinate and monitor a special seed (Cress Seed which ...

    In the fifth test tube the length of the shoot was 2cm and the rest had not changed. 6. In the last test tube the length of the shoot was 1.5cm and there was no other change which was visible.

  1. Factors That Germination Influence

    This means that no water will enter the seed, preventing germination from starting and removing any trace amount of water inside the seed via osmosis. As the water potential around the seed increases, water will be taken into the seed and trigger germination.

  2. Broad Bean Investigation.

    experiment this will mean that all three beakers will not receive equal amounts of sunlight which can therefore affect my overall outcome. 2. What if it is a cloudy day the beans will get no sunlight this will also goes for the beaker in the water bath.

  1. What are the best conditions for the germination of seeds?

    Place the test tubes into a test tube rack. 4) Repeat procedures 2 +3 four more times 5) Place the test tube racks into the water baths, freezer and an open space in a room in order to do room temperature.

  2. Experiment Report on Best Fertilisers

    levels of the soil with the fertilizer and the water levels in each test, to later find out whether they have something to do with the fertilizer. To test the plants for their pH level, shove the pH tester into the middle of the pot at least 2cm deep and

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