" Effect of Plant Growth Against Sunlight Green Beans "CHAPTER I
INTRODUCTION
1.1 Background
Plants are living things that act as a producer on this earth . In ecosystems there are two kinds of interdependent components , ie components of biotic and abiotic components . biotic component consists of plants , animals , and humans . While abiotic components include: air , gas , angina , light , sun , and so on . Between biotic and abiotic components influence each other , for example , plants require sunlight to perform photosynthesis . Of photosynthesis in need by other living things . Therefore , we conducted experiments to determine whether there is influence of sunlight on the growth of green beans .
1.2 Objectives and Benefits Research
1.2.1 Research Objectives
Our goal this research are as follows :
a) We want to know , whether there was influence of sunlight on the growth of green beans
b ) We want to know and study the problem of influence of sunlight on green bean plants .
c ) We want to know how the sunlight can affect the growth of green bean plants .
1.2.2 Benefits Research
The benefit of this is pecobaan so we know how important the influence of sunlight for living things , not least on plant growth .
1.2.3 Research Variables
1 . Control variables include:
growing medium , seed types , the amount of water .
2 . Independent variables , including :
air temperature , amount of light , air humidity .
3 . The dependent variable , include :
number of leaves , plant height , plant age , plant quality
CHAPTER II
LITERATURE REVIEW
Mepengaruhi many growth factors include genetic factors for internal and external factors consist of light , humidity , temperature , water , and hormones . For the germination process is influenced by many factors and hormones light , although other factors influence . According leteratur germination is influenced by the hormone auxin , if doing germination in the dark it will grow faster but bent , it is because the hormone auxin is very sensitive to light , if the growth is uneven . While in the place that germination will occur relatively longer , it also caused the influence of the hormone auxin is equally active when exposed to light . So that the plant generated a normal or sticking straight up
Sunlight is useful for photosynthesis in plants , but other effects of the sun is to suppress the growth of plant cells . This causes the plants exposed to sunlight will be shorter than the plants that grow in the dark . This event is called etiolation , ie the growth of plant cells very quickly in the dark .
Etiolasi = phenomenon shown dalah plants that grow darker , characterized by pale, long - long segment , and small leaves . ( www.kamusilmiah.com )
The impact of crop plants is due etiolasi can not perform photosynthesis . Though the process of photosynthesis to produce carbohydrates aim was instrumental in the formation of chlorophyll . Because carbohydrates are not created , even without chlorophyll leaves so the leaves are not green , but a pale yellow .
Dark conditions also stimulate production of the hormone auxin . Auxin is a growth hormone that is found in the meristem cells , such as the tip of the root and stem ends . Therefore , the plant will grow faster and harvest .
The term auxin is derived from the Greek language meaning auxien increase . Auxin was first used Frits Went, a Dutch graduate student in the country , which found that a compound that can not be characterized may cause the coleoptile bending toward the light . This bending phenomenon known as phototropism . These compounds are found coleoptile Went areas . Auxin activity tracked through the bending that occurs due terpacunya coleoptile elongation on the side that is not exposed to sunlight . And the results of his research , in 1928 the production of auxin inhibited in plants are often exposed to sunlight .
In addition , the enzyme riboflavin on the rod tip absorbs indigo rays from the sun . Indigo rays destructive enzymes that form indo formation of acetic acid (a type of auxin ) . That is why , etiolasi plant growth is always faster , but the stem looks withered because they contain a lot of water .
Due to no sunlight on plant propagation organs , long - time shrink and die for lack of food sources .
In addition , the physiologists have investigated the influence of auxin in the process of formation of common roots , which helps balance the growth of the root system . There is strong evidence showing that auxin from the stem is very influential in the early root growth . When the young leaves and buds , which contain a lot of auxin trimmed , it will decrease the amount of root formation . When the loss of the organ is replaced with auxin , the ability to form common roots back
2.2 hypothesis
a) Plant etiolasi had higher plant height than plants exposed to sunlight .
b ) look better etiolation Plants wilt than plants exposed to sunlight .
c ) The number of leaves of the same plant etiolation with plants exposed to the sun .
d ) The color of plant leaves etiolasi pale yellow , while the color of the leaves of plants exposed to sunlight green .
e ) Plant etiolasi have age shorter than plants exposed to sunlight .
CHAPTER III
METHODS
3.1 Time
Experiment was conducted on June 5 , 2009 to 12 Agutus Agutus 2009
3.2 place
This experiment was conducted in class X - 4 , SMA Negeri 3 Jambi
3.3 Equipment and Materials
Ø 3 pieces of aqua glass .
Ø Cotton taste .
Ø Some green bean seedlings .
Ø Water taste .
Ø Markers .
3.4 How it works
1 . Soak some green bean seeds . Leave for a few moments .
2 . Choose seeds that grow green beans for planting .
3 . Prepare 3 pieces of aqua glass .
4 . Write the first aqua glass with the words " one pot " , the second aqua glass with the words " pot 2 " , and the third aqua glass with the words " pot 3 " .
5 . Letakanlah some cotton Bengan thickness of each 1 cm on each glass aqua .
6 . Plant on each glass aqua earlier with each 5 green bean seedlings .
7 . Letakanlah aqua glass first in places exposed to the sun light and the second aqua glass in a dim ( not exposed to direct light ) , and the third aqua glass in a dark place with absolutely no sunlight .
8 . Third anoint the aqua glass of water with the same lot number ( to taste ) regularly every morning and afternoon .
9 . Observe the growth of the third crop of green beans and insert data from tables that have been provided .
CHAPTER IV
RESULTS AND DISCUSSION
4.1 Research Results
1. t
24.1
RESULTS AND DISCUSSION
4.1 Research Results
1. t
24.1
4.2 Discussion
Dietiolasi green bean plants ( plants that grow darker dalah ) grows faster than plants exposed to a lot of light in a natahari or dim because the hormone auxin is not inhibited by sunlight . Auxin is a growth hormone that is found in the meristem cells , such as the tip of the root and stem ends . Therefore , the plant will grow faster .
However, the plant stems can tidah straight, but curved . As well as the leaves . The plant's leaves look wilted and not fresh , as well as yellowish green color and a little pale . This happens because the plant does not get sunlight at all so plants are not able to produce carbohydrates for the formation of chlorophyll . This plant also has excessive water content due to no sunlight . And because it does not get the sun , after a long time and will shrink and die for lack of food sources .
While green bean plants that get little sun / put in place dim normal growth . Plants seem fresh because getting enough sunlight . The leaves are dark green plants . Growth was normal to above . The plant hormone auxin in the running normally resulting in not too high . The leaves also get enough sunlight to the formation of chlorophyll karboidrat .
Again with different plants that are always exposed to sunlight . Plant growth is severely hampered . but the texture is very strong stems and leaf color also appear dark green and looked fresh . This happens because the plants get too much sunlight causes the plant hormone auxin inhibited so be stunted / short .
Thus , sunlight affects the growth of green bean plants .
CHAPTER V
CLOSING
5.1 Conclusion
From the above experiments it can be concluded that :
1 . Etiolasi plants have a higher plant height than plants exposed to sunlight .
2 . Etiolasi plants look more wilted than plants exposed to sunlight
3 . Both plants have the same number of leaves many , the two strands .
4 . Sunlight is one of the factors that influence the growth of green bean plants .
5.2 Suggestions
In the face of this earth , plants are a source of food , our advice is let us preserve the plants because we realize that without plants or plants we would not exist on this earth . And hopefully with the scientific work that we made called " influence of sunlight on the growth of green bean plants ", the reader interested in reading it .
Dietiolasi green bean plants ( plants that grow darker dalah ) grows faster than plants exposed to a lot of light in a natahari or dim because the hormone auxin is not inhibited by sunlight . Auxin is a growth hormone that is found in the meristem cells , such as the tip of the root and stem ends . Therefore , the plant will grow faster .
However, the plant stems can tidah straight, but curved . As well as the leaves . The plant's leaves look wilted and not fresh , as well as yellowish green color and a little pale . This happens because the plant does not get sunlight at all so plants are not able to produce carbohydrates for the formation of chlorophyll . This plant also has excessive water content due to no sunlight . And because it does not get the sun , after a long time and will shrink and die for lack of food sources .
While green bean plants that get little sun / put in place dim normal growth . Plants seem fresh because getting enough sunlight . The leaves are dark green plants . Growth was normal to above . The plant hormone auxin in the running normally resulting in not too high . The leaves also get enough sunlight to the formation of chlorophyll karboidrat .
Again with different plants that are always exposed to sunlight . Plant growth is severely hampered . but the texture is very strong stems and leaf color also appear dark green and looked fresh . This happens because the plants get too much sunlight causes the plant hormone auxin inhibited so be stunted / short .
Thus , sunlight affects the growth of green bean plants .
CHAPTER V
CLOSING
5.1 Conclusion
From the above experiments it can be concluded that :
1 . Etiolasi plants have a higher plant height than plants exposed to sunlight .
2 . Etiolasi plants look more wilted than plants exposed to sunlight
3 . Both plants have the same number of leaves many , the two strands .
4 . Sunlight is one of the factors that influence the growth of green bean plants .
5.2 Suggestions
In the face of this earth , plants are a source of food , our advice is let us preserve the plants because we realize that without plants or plants we would not exist on this earth . And hopefully with the scientific work that we made called " influence of sunlight on the growth of green bean plants ", the reader interested in reading it .
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