8/11/2019 Conclusion Lab 2 and 5

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CONCLUSION (LAB 2)

By looking into the result, we can notice there is a significant increase in overall

average length of internode for pot 4 and 5, which are the pots similarly filled with

1% Indol acetic acids (IAA).There are only these 2 pots showed positive increase in

internode length, while the rest stated a reduction in internode length.

The comparison can be done by discussing the difference of 2 particular element,

which is the 0.1% of gibberelic acids and kinetin. Pot 4 with gibberelic acids stated

about 0.3cm longer in average internode length as compared to the pot with kinetin.

We may conclude that gibberelic acid(GA) has a better effect in promoting elongation

of plants. Kinetin on the other hand, has a poor record of kinetin-induced cell division

without presence of auxin. We believe this is the limitation that makes kinetin less

versatile from the standpoint of enhancing cell division and elongation process to

occur.

Under low concentration of GA, germinating seeds stimulated to produce RNA that

code for hydrolytic enzyme, as a result it is said to have strong influence in rapid stem

and root growth. Unlike GA, kinetin has stronger ability in delaying senescence of

leaves and anti-aging functions. However, it still possess the capability of inducing

cell division to occur, and increase the production of crops otherwise.

The observation on Pot 1,2, and 3 seem to be less satisfying in terms of internode

length. Throughout the experiment, the internode length became shorter in average

especially in Pot 2. As we can see that is the pot when the stem apex was cut and only

been treated with lanolin. Function of lanolin is primarily for the wool and skin

protection. It is unlike auxin and other growth substances, they do not induce

elongation in plants. There is no doubt for this phenomenon to occur under this

circumstances.

When comparing Pot 1 with the pot under presence of auxin, we may see a significant

difference between both condition. Plants without treatment are more likely to grow

slower, unsimilar to those with auxin induction since they are effective in aiding the

growth process of plants.

8/11/2019 Conclusion Lab 2 and 5

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CONCLUSION (Lab 5)

The development process of fruits is strongly correlated with the presenceof certain substances. In the experiment, we identify the difference of

sugar content of fruits between ripe and unripe fruit. As expected, both

fruits namely the pineapple and papaya showed a higher value of sugar

content in when they ripe. This happens because when fruit ripened, they

undergo breakdown of enzyme and hydrolysis of storage polysaccharides,providing increase value of sugar molecule such as fructose and sucrose

in the fruits. Hence, this phenomenon happened is normal.

Meanwhile, there is also another experiment identifying the content of

citric acid for the ripe and unripe fruit. The subjects are same as the

previous experiment, which is the pineapple and papaya. Citric acid is

very important weak organic acid in providing acidic or sour taste infruits. This compound can be found mostly in citrus fruits such as lemons

and limes, which is well known as sour-taste fruits. In the experiment, we

notice the ripe pineapple has a lower citric acid content compared to

unripe one. Some sources suggested the content of citric fruit has to do

with the sugar content of the fruit. Unripe pineapple taste sourer than ripepineapple, because the sugar content of unripe ones is still low. When the

fruit ripen, the sour taste gets lesser because the sugar content increased

and gives the sweet taste.

For papaya which is well known as sweet taste, its citric acid value is

significantly lower compared to pineapple. It is not considered as citrus

fruits, hence it is understood that the value of citric acid is at a very low

amount.