Importance of plants

Importance of plants

Plants and plant communities (places where a variety of plants live together) are very important to humans and their environment. Here are some of the important things plants provide.

Aesthetics

Plants have great "aesthetic" value which means they add to the beauty of the places that we live. How many of us would be want to live without the plants around us, including the forests, woodlands, and grasslands surrounding our towns and cities? Native grasses and wildflowers provide use with a link to our history.



Medicine

Throughout history plants have been of great importance to medicine. Eighty percent of all medicinal drugs originate in wild plants. In fact, 25 percent of all prescriptions written annually in the United States contain chemicals from plants.



In spite of all the medical advances, only 2 percent of the world's plant species have ever been tested for their medical potential. That means there are many important drugs yet to be discovered.



Food

Although some 3,000 species of plants have been used as food by humans, 90 percent of the world's food comes from only 20 plant species. Three species of grasses--rice, wheat, and corn-are the most important food plants.



Industrial Products

Plants are also very important for the goods they provide. Fibers from plants provide clothing. Wood used to build our homes depends on plants. Some fuel products are made from plants, like ethanol made from corn and soy diesel made from soybeans.



Recreation

Plant communities form the basis for many important recreational activities, including hiking, fishing, hunting, and nature observation.



Air Quality

The oxygen in the air we breathe comes from the photosynthesis of plants. The quality of the air can be greatly influenced by plants. Plants can stop the movement of dust and pollutants. Through the intake of carbon dioxide, plants can also lessen the greenhouse effect caused from the burning of fossil fuels like coal.



Water Quality

Plants are extremely important to the quality of the water we use. A diverse cover of plants aids in maintaining healthy watersheds, streams, and lakes by holding soil in place, controlling stream flows, and filtering sediments from water.



Erosion Control

The delicate wildflowers that dot the roadsides in Iowa during the spring, summer and fall, protect the soil from erosion caused by heavy rains. Without enough plant cover, wind or water erodes the thin layer of soil that we depend on.



Climate

Regional climates are impacted by the amount and type of plant cover. Forest and marshes, for example, can cool local climates. Natural disasters, such as drought, have been blamed on the destruction of forests and other critically important plant communities.



Fish and Wildlife Habitat

Plants and plant communities provide the necessary habitat (a place to live) for wildlife and fish populations.



Ecosystem

The word "ecosystem" means the way in which humans, plants and animals all live together supporting each other. Every species serves an important role or purpose in their community.

Plants Are Our Life (Machines making oxygen)

Plants Are Our Life (Machines making oxygen)
How many plants required to keep one person alive for one hour?



1. How much oxygen does a person need in an hour?
2. How much oxygen does a plant produce in an hour?
3. Based on the above, how many plants will provide the oxygen needs of the
person for the hour?

Here is the solution to the first question: A resting, healthy adult on an
average, cool day breathes in about 53 liters of oxygen per hour. An average,
resting, health adult breathes in about 500 mL of air per breath. This is
called the normal tidal volume. Now, 150 mL of this air will go to non-
functioning areas of the lung, called the "dead space." The average breath
rate for this average person is 12 breaths per minute. So, the amount of air
breathed in by the person which is available for use is 12 x (500 mL -150 mL)
= 4,200 mL/minute. Multiply by 60 to get 252,000 mL/hour. That is, every
hour, the person will breathe in 252 L of air. Now, on an average, cool,
clear day, only 21% of that air is oxygen. So, 21% of 252 L is 53 L. So, in
an hour, the person breathes in about 53 L of oxygen.



As you might see, there is a lot of assumptions in the above reasoning:
average healthy, resting adult on an average, cool, clear day. Any change in
activity, health, size, sex, etc. of the person or the temperature, humidity,
barometric pressure, etc. of the day will change the figure we calculated.
But, let us just work with the 53 L as a nice "average."

Now, to answer the second question, how much oxygen do plants produce in an
hour. Actually, I have data for how much oxygen LEAVES produce in an hour: 5
mL. If your average plant has 30 leaves, then that would be 5 ml/leaf x 30
leaves = 150 ml/plant/hour. So, if an average person needs 53,000 ml (53 l)
of oxygen per hour, and the average plant produces 150 ml per hour, then
53,000/150 = 353 plants. Since these are round figures, let us just say that
between 300 to 400 plants are needed to produce enough oxygen to keep a person alive in an hour. Again, there are many assumptions: average leaf, average
Plant.
But if we think 300 to 400 plants are required to keep one person alive for one hour means every person has its responsibility to plant this much plants in his life.
Are we doing it? if not it is today’s need that we must ask this question to ourselves because if we want to live on earth its need. if we are not doing this we must think about our future. Plus you will need to take into accounted oxygen production decreases as carbon dioxide concentration increases Assuming this hypothetical person is in a confined space with all these plants, the CO2 concentration will rise due to the person's expiration. This will inhibit the plants photosynthetic rate.

Net Notes

repetitive DNA-Tandem repeat: Minisatellite A minisatellite is a section of DNA that consists of a short series of bases 10–60bp.Minisatellites" consist of repetitive, generally GC-rich, variant repeats that range in length from 10 to over 100 bp. These variant repeats are tandemly intermingled, which makes minisatellites ideal for studying DNA turnover mechanisms. Satellite DNA Satellite DNA consists of highly repetitive DNA, and is so called because repetitions of a short DNA sequence tend to produce a different frequency of the nucleotides adenine, cytosine, guanine and thymine, and thus have a different density from bulk DNA - such that they form a second or 'satellite' band when genomic DNA is separated on a density gradient Microsatellite Microsatellites, Simple Sequence Repeats (SSRs), or tandem repeats, are repeating sequences of 1-6 base pairs of DNA Microsatellites are typically neutral and co-dominant. They are used as molecular markers in genetics, for kinship, population and other studies. They can also be used to study gene duplication or deletion.

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Interrupted genes:

Interrupted genes: Genes whose coding sequence is interrupted at intervals by long stretches of non-coding sequences. The coding regions came to be known as exons and the non-coding regions as introns. This structure is now found to be characteristic of most eukaryotic genes. The number and size of introns vary greatly, and they are often much longer than the coding sequences. After transcription, the intron regions are removed, or spliced out form the RNA transcript before it is translated into protein.

Sweet potatoes are large, sweet-tasting, starchy, tuberous roots that are eaten as a vegetable. Flesh of the sweet potato is mainly starch, some protein, and vitamins A and C; flesh can be yellow, orange, or purple. Leaves are edible, and rich in protein and vitamins.

Sweet potatoes are warm-weather vegetables that require a long frost-free growing season. They are perennial vines with heart-shaped leaves, sometimes grown as ivy, and ground cover, and adaptable to container-growing and hanging baskets. Flowers are of medium size.

Sweet potatoes should be planted when there is no chance for frost. Propagation is from slips, which are produced from roots, and from cuttings. Sweet potatoes require at least one inch of uniform watering per week, which should water soil to six inches deep. Allowing roots to dry out and then watering causes cracking of sweet potatoes. Watering in the morning reduces the chance of diseases. Disease and insects are not usually problems and can be limited by crop rotation. Sweet potatoes are usually ready for harvest in 120 days. Care must be taken not to damage or bruise fragile skins.

Global warming is the increase in the average temperature of Earth's near-surface air and oceans since the mid-20th century and its projected continuation. Global surface temperature increased 0.74 ± 0.18 °C (1.33 ± 0.32 °F) between the start and the end of the 20th century. Temperature increase since the middle of the 20th century was very likely caused by increasing concentrations of greenhouse gases resulting from human activity such as fossil fuel burning and deforestation. global surface temperature is likely to rise a further 1.1 to 6.4 °C (2.0 to 11.5 °F) during the 21st century (Climate model projections summarized in the latest IPCC report indicate) However, warming is expected to continue beyond 2100 even if emissions stop, because of the large heat capacity of the oceans and the long lifetime of carbon dioxide in the atmosphere
And no Drought only human being is responsible for all adverse effect likely to coming ……
Effect of Global Warming

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