Plant Growth
Growth in plants occurs chiefly at meristems where
rapid mitosis provides new cells. As these cells differentiate, they provide
new plant tissue
Stem Growth-
In stems, mitosis
in the apical meristem of the shoot apex (also called the terminal bud)
produces cells that enable the stem to grow longer and, periodically, cells
that will give rise to leaves. The point on the stem where leaves develop is
called a node. The region between a pair of adjacent nodes is called the internodes.
Root Growth-
Roots
Structure
The
Root Tip
The
root tip consists of a meristem - a region of rapid mitosis, which produces the
new cells for root growth. root cap - a sheath of cells that protects the
meristem from abrasion and damage as the root tip grows through the soil.
Aloe vera is a
stemless or very short-stemmed succulent plant growing to 60–100 cm
(24–39 in) tall, spreading by offsets. The leaves are thick and fleshy,
green to grey-green, with some varieties showing white flecks on the upper and
lower stem surfaces.The margin of the leaf is serrated and has small white
teeth. The flowers are produced in summer on a spike up to 90 cm
(35 in) tall, each flower being pendulous, with a yellow tubular corolla
2–3 cm (0.8–1.2 in) long.Like other Aloe species, Aloe vera
forms carbuncular mycorrhiza,
a symbiosis that allows the plant better access to mineral nutrients in soil.
CULTIVATION-
Aloe vera has been
widely grown as an ornamental plant. The species is popular with modern
gardeners as a putatively medicinal plant and due to its interesting flowers,
form, and succulence. This succulence enables the species to survive in areas
of low natural rainfall, making it ideal for rockeries and other low-water use
gardens.The species is hardy in zones 8–11, although it is intolerant of very
heavy frost or snow.The species is relatively resistant to most insect pests,
though spider mites, mealy bugs,
ALOE VERA SCIENCE EXPERIMENTS
Aloe Barbadensis is the scientific name for aloe vera, a
plant with
a reputation for
unique medicinal properties. This unique trait
makes it a useful plant on which to perform science
experiments.
experimental use. You can test aloe vera plants, pure
aloe and
aloe-containing products, with the results compared to
each other.
Aloe has purported effects on the skin and digestive
system, as well
as cosmetic uses.Aloe vera
EFFECT OF ALOE ON HAIR GROWTH
Perform an experiment to determine whether aloe vera
enhances hair growth. For this experiment, shave all hair off two areas of the
skin. Record the observations and make a hypothesis regarding the outcome.
Apply aloe vera several times each day to one of the shaved areas for a period
of time sufficient to allow for hair growth to resume. Compare the hair growth
of the area where aloe was applied to the area where aloe was not applied.
Record the results.
EFFECT OF MUSIC ON ALOE VERA PLANTS
Determine the effect of music on the growth of plants.
For this experiment, get at least three different aloe vera plants. Put one
plant in a room where the plant is exposed to rock or rap music. Put another
plant in a room where the plant is exposed to classical music. Place the third
plant in a room where the plant is not exposed to any music. Make a hypothesis
regarding the outcome. Compare the growth of the three plants after one or two
weeks. Record the results of the experiment.
EFFECT OF DIFFERENT SOIL TYPES ON ALOE VERA
Perform an experiment to test whether an aloe vera plant
grows better in potting soil or in sand. This experiment requires two aloe vera
plants. Put one of the plants in a pot with sand and put the other plant into a
pot that contains potting soil. Make a hypothesis regarding the outcome. After
two weeks, observe the plants and note any differences in the growth of the
plants. Record the results.
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