Green plants exclude the red and brown algae, the fungi, archaea, bacteria and animals. Green plants have cell walls with cellulose and obtain most of their energy from sunlight via photosynthesis by primary chloroplasts, derived from endosymbiosis with cyanobacteria. Their chloroplasts contain chlorophylls a and b, which gives them their green color.
NOTE: Endosymbiosis a type of symbiosis in which one organism lives inside the other, thetwo typically behaving as a single organism.
Some plants are parasitic and have lost the ability to produce normal amounts of chlorophyll or to photosynthesize. Plants are also characterized by sexual reproduction, modular and indeterminate growth, and an alternation of generations, although asexual reproduction is also common.
The study of plants is Known as BOTANY, and is also called plant biology. It is sometimes called phytology. Scientists who study botany are called botanists
KEY NOTE: Theophrastus is regarded as the Father of Botany.
BENEFITS OF GREEN PLANTS.
- Live indoor plantscapes demonstrate nature’s hearty resolve and process of cleaning surrounding air while exchanging it for fresh oxygen.
- Plants Contribute are Important to a Healthy Lifestyle.
- Carbon Dioxide Reduction. Based on modest estimates of existing and emerging data, it has been calculated that a minimum of 300g (10 oz) of carbon dioxide can be eliminated from the enclosed environment for every square meter of leaf surface in the area per year.
- Plants possess a natural ability to draw their system towards a light source, which can act as an indoor awning while producing a beautiful fluid effect across the space.
- With plant life visible from nearly every floor, the wall acts as an indoor air purifier, pulling air through the wall and into the mechanical air ducts.
WHAT IS HORTICULTURE?
Horticulture is the science and art of producing, improving, marketing, and using fruits, vegetables, flowers, and ornamental plants. It differs from botany and other plant sciences in that horticulture incorporates both science and aesthetics.
Flowers and ornamental plants enrich our homes and communities, and contribute to our sense of well-being. Horticulture impacts our lives on a daily basis by providing nutritious fruits and vegetables, offering visual enjoyment, and promoting recreational activities.
CLASSES OF HORTICULTURE
Horticulture is classified into the following;
- Arboriculture is the study of, and the selection, plant, care, and removal of, individual trees, shrubs, vines, and other perennial woody plants.
- Turf management includes all aspects of the production and maintenance of turf grass for sports, leisure use or amenity use.
- Floriculture includes the production and marketing of floral crops.
- Landscape horticulture includes the production, marketing and maintenance of landscape plants.
- Olericulture includes the production and marketing of vegetables.
- Pomology includes the production and marketing of pome fruits.
- Viticulture includes the production and marketing of grapes.
- Oenology includes all aspects of wine and wine making.
- Postharvest physiology involves maintaining the quality of and preventing the spoilage of plants and animals.
KEY POINT: *Plants help remove chemicals and bacteria from water in the ground*
PLANTS AND THE ENVIRONMENT
The environment shapes plants, but plants also influence the environment. They store carbon, fix nitrogen and produce oxygen. They shape weather patterns, provide flood defense, purify water, provide food, and offer solace and inspiration.
Plants make oxygen. One of the materials that plants produce as they make food is oxygen gas. This oxygen gas, which is an important part of the air, is the gas that plants and animals must have in order to stay alive. When people breathe, it is the oxygen that we take out of the air to keep our cells and bodies alive. Plants reduce pollution by reducing the amount of carbon dioxide in the air and giving off oxygen – just what we need to survive! This is called photosynthesis.
Trees and plants absorb sound and help with noise pollutions. For people who live near a motorway or railway, planting trees can prevent some of the noise from roads and trains disturbing homes.