Plant Life Requirements
Measures in units of footcandle (fc) and lux (lx), indirect bright light means around 189 footcandles
Light Requirement for POINSETTIAS
Annuals vs Perennials
Monocots vs Dicots
Types of Plant Life
Xeriphates: Plants such as cacti, that are adapted to an arid environment.
Mesophytes: Plants adapted and survive in an environment with a moderate amount of water.
Hydrophytes: Plants constantly exposed to water (aquatic plants).
The leaf of a plant serves several important functions. Leaves are the chief organs of photosynthesis, a process in which plants are capable of converting light energy into organic food. Most leaves are arranged on the stem in such a way as to receive maximum sunlight and cast minimum shadows on other leaves. Leaves are the major organs responsible for gas exchange between the plant and its surrounding atmosphere. The gases typically move through small openings in the leaf known as stomata or stomates. Water, in a vapor form, also passes through these openings, a process known as stomatal transpiration.
The stomata are openings in the epidermis surrounded by two specialized epidermal cells, the guard cells, which by changes in shape bring about the opening and closure of the pore. The guard cells are normally kidney-bean shaped cells that contain chloroplasts.
The stomata may be located on the upper leaf surface only, lower leaf surface only, or both the upper and lower leaf surfaces.
Number and distribution of stomata vary considerably if grown under different environmental conditions, such as in a dry field or a moist greenhouse. On the other hand, the sizes of stomata are fairly constant for species.
Monocots typically have approximately a 1:1 ratio of stomata on the upper and lower epidermis.
Dicots typically have the greatest number of stomata
on the lower epidermis, with stomata often absent
on the upper epidermis.
Plant Self- Defense
Plants were first aquatic, then there were mosses
Bryophytes : the non-vascular plants
Gymnosperms and conifers
And then Angiosperms
How cacti adapt
formerly Cruciferae, the mustard family of flowering plants, cabbage, broccoli, Brussels sprouts, kale, kohlrabi, napa cabbage, turnip, and rutabaga, horseradish, radish, and white mustard.
A process in which humans consciously select for or against particular features in organisms. For example, the human may allow only organisms with the desired feature to reproduce or may provide more resources to the organisms with the desired feature.
potato (Solanum tuberosum); eggplant (S. melongena); tomato (S. lycopersicum); peppers (various Capsicum species); tobacco (Nicotiana tabacum and N. rustica); belladonna (Atropa belladonna); the poisonous jimsonweed (Datura stramonium) and nightshades: britannica.com
also called Leguminosae, pea family of flowering plants (angiosperms), about 20,000 species of trees, shrubs, vines, and herbs and is worldwide in distribution, soybeans, garden peas, peanuts, and alfalfa
also called Umbelliferae, parsley, carrot, celery, parsnip, and fennel, anise, dill, coriander, caraway, and cumin