Assalamualaikum and hello :)
There have been 7 weeks since I start
learning Biology and Cell Developmental with Dr Parameswari. This week going to
be the last week Dr Parameswari teaching
us this subject and Dr Nik will replace her. For this week, we discussed the test 1 answers and we learn
about plant hormones. Plant hormones are chemicals produced by plants that
alter growth patterns and/or maintenance of the plant.
There are many types of plant hormones.
But we focussed on 5 main hormones in plants. There are Auxins, Cytokinins, Gibberellins,
Abscisic Acid and Ethylene. Different hormones affect different plant processes. When we understand how hormones work, it will
allows horticulturists to manipulate plants for specific purposes.
AUXINS : Auxins
produced in the terminal buds suppress the growth of side buds and stimulate
root growth. They also affect cell
elongation (tropism), apical dominance, and fruit drop or retention. Other than
that, Auxin also plays a role in maintaining apical dominance.
GIBBERELLINS
: Gibberellins promote stem elongation. They are not produced in stem tip.
Gibberellic acid was the first of this class of hormone to be discovered.
CYTOKININS :
Cytokinins promote cell division, and influence cell differentiation and aging
of leaves.
ABSCISIC
ACID : Abscisic acid is considered the “stress” hormone. It inhibits the effects of other hormones to
reduce growth during times of plant stress.
ETHYLENE :
Ethylene is a gas produced by ripe fruits. Ethylene is used to ripen crops at
the same time. Sprayed on a field it will cause all fruits to ripen at the same
time so they can be harvested.
Okay. Done. From what I have learnt, not only for this 7
weeks, but since I studied science in primary school, Biology is very interesting
subject. From my view, when we studied about science, we studied about what
have God created a long time ago. The nature, the organs, and the world.
Because we can not stop questioning why. Why the organs like that ? Why the
viroids effect plants ? Why and why and we get a new experiences and knowledge
everytime we find answer for it. It
helps us get a better understanding about the world in its natural processes, it
is the study of how lives evolves, survives and changes through out the times,
it gives knowledge about the interaction of cells with organs and organisms,
environment and ecosystem, it teaches how various organs and system works on
human body in a perfect way and how everything is connected in our body and
many else.
Biology is about the world. It have been a great 7 weeks with you
Dr. Thank you for your sharing about this interesting subject and also your
experiences. Have a blast !
Thankyou !
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