Presentation during the Bureau of Agricultural Research (BAR) Seminar Series on March 23, 2017 at RDMIC Bldg., cor. Visayas Ave., Elliptical Rd., Diliman, Quezon City
What and why of hydroponics ?
Benefits
Crops, in Hydroponics
Material needed
Different Methods: DWC, NFT, Aeroponics etc.
Physical Set up & Costing of project
Presentation during the Bureau of Agricultural Research (BAR) Seminar Series on March 23, 2017 at RDMIC Bldg., cor. Visayas Ave., Elliptical Rd., Diliman, Quezon City
What and why of hydroponics ?
Benefits
Crops, in Hydroponics
Material needed
Different Methods: DWC, NFT, Aeroponics etc.
Physical Set up & Costing of project
Seed dormancy, its causes and applicabilityPragyaNaithani
Seed dormancy is defined as a state in which seeds are prevented from germinating even under environmental conditions normally favourable for germination. According to Wareing (1965) the term dormancy is used in the sense where the viable seed of a given species falls to germinate under conditions of moisture, temperature and oxygen supply which are normally favourable for the later stages of germination and growth of that species.
Many seeds do not germinate when placed under conducive conditions for germination viz., optimum temperature, moisture, oxygen. However, seeds can be shown to be viable, as they can be induced to germinate by various special artificial treatments, or under special external conditions. Such seeds are said to be dormant, or to be said in a state of dormancy.
Plants with a long history of domestication generally, show less dormancy than wild or recently domesticated species. When domesticated species exhibit dormancy, they become a problem to the communities involved in seed occupation. However, a degree of dormancy in certain crops is desirable since it prevents pre-harvest germination and helps in the maintaining seed quality. Though, dormancy may be cause seeds of numerous species to maintaining ungerminated in the soil for many years. This explains the presence of unwanted crop plants or weeds in fields that are cultivated regularly and maintain seed quality.
All living organisms such as plants and animals require food. So food is essential for all living organisms. Plants are capable of making their food themselves but humans and animals cannot.
Carbohydrates, proteins, fats, vitamins and minerals are essential components of food, these components are called Nutrients.
Seed dormancy, its causes and applicabilityPragyaNaithani
Seed dormancy is defined as a state in which seeds are prevented from germinating even under environmental conditions normally favourable for germination. According to Wareing (1965) the term dormancy is used in the sense where the viable seed of a given species falls to germinate under conditions of moisture, temperature and oxygen supply which are normally favourable for the later stages of germination and growth of that species.
Many seeds do not germinate when placed under conducive conditions for germination viz., optimum temperature, moisture, oxygen. However, seeds can be shown to be viable, as they can be induced to germinate by various special artificial treatments, or under special external conditions. Such seeds are said to be dormant, or to be said in a state of dormancy.
Plants with a long history of domestication generally, show less dormancy than wild or recently domesticated species. When domesticated species exhibit dormancy, they become a problem to the communities involved in seed occupation. However, a degree of dormancy in certain crops is desirable since it prevents pre-harvest germination and helps in the maintaining seed quality. Though, dormancy may be cause seeds of numerous species to maintaining ungerminated in the soil for many years. This explains the presence of unwanted crop plants or weeds in fields that are cultivated regularly and maintain seed quality.
All living organisms such as plants and animals require food. So food is essential for all living organisms. Plants are capable of making their food themselves but humans and animals cannot.
Carbohydrates, proteins, fats, vitamins and minerals are essential components of food, these components are called Nutrients.
TRANSPORTATION IN PLANTS - CBSE (CHAPTER-9)NBIOLOGYBIOLOGY TEACHER
Transport of substance in plants
To circulate water, essential nutrients, excretory products, and gases within the plants for various purposes, transportation in plants is necessary. In vascular tissues, this transportation in the plant takes place. By a suction force, water and minerals are transported to various parts of the plant.
Only green plants possess the amazing ability of trapping solar energy to produce food.
Photosynthesis is the process in which green plants absorb solar energy to make food from carbon dioxide and water.
2. What is photosynthesis?
Photosynthesis is the process by which green plants
makes food in the presence of sunlight, in order for
photosynthesis to take place in green plants they need
water and minerals from the soil, sunlight and air.
air(carbon dioxide).
4. The process of photosynthesis
Plants acquire carbon dioxide from the air. It goes
through the pores in the leaves called the stomata,
water is absorbed from the soil by the roots. This water
is taken by the xylem vessels and is being distributed
to other parts of the plant.
5. Photosynthesis in green plant
Photosynthesis takes place in the chloroplast of a
green plants. The chloroplast contains a green pigment
called chlorophyll that trap the energy from the sun.
The plant use this energy to make food.
Photosynthesis takes place in green leaves but it can
occur in any area of the plant that is green. After
photosynthesis food is stored in the plant ,example
root, stem, and leaves. Oxygen is release into the
atmosphere ,while the manufactured food is being
transported by the phloem vessel.
6. The Plant Transport System
Plants have two different types of transport tissue.
Which include the xylem and phloem. Xylem
transports water and solutes from the roots to the
leaves, phloem transports food from the leaves to the
rest of the plant. Transpiration is the process by which
water evaporates from the leaves, which results in
more water being drawn up from the roots. Plants have
adaptations to reduce excessive water loss.
7. Functions of the vessels in plants
Xylem vessels Phloem vessels
It absorb water from the soil
through root hair cells.
Water is transported up the
stem to the leaves of a plant.
Water evaporates from the
leaves by a process called
transpiration.
It is consist of dead cells.
It have a thick cellulous wall.
It transport food substances
from the stem to growing
tissues of the plants.
It stores food in the tissues of
plants.
It consist of columns of living
cells.
10. Photosynthesis
Advantages Disadvantages
1. All food comes from plant
whether directly or
indirectly.
2. Oxygen which is needed by
animals is produce as a
result of photosynthesis.
3. The level of carbon dioxide
is reduce by photosynthesis.
1. Photosynthesis cannot be
done in shade.
2. Photosynthesis can not be
done over night.