Transcript Asexual Reproduction - Montgomery County Schools

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1. To identify factors to consider when growing
aquatic plants.
2. To examine the propagation process of
aquatic plants.
3. To differentiate between submerged,
emerged and floating plants.
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• Provide the following to aquatic animals:
– food
– habitat
– protection from predators
– nutrient cycling
– erosion control
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• Is the farming of marine organisms in their natural
habitat
• Combines aquatic plants and animals in salt water
• Is a sub-group of aquaculture
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• Is the multiplying of organisms through
natural reproduction
• Stimulates health and variety among plants
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• Requires a part of the plant to be used in propagation;
asexual reproduction
– stem-cutting is a common form of vegetative
propagation
• Is the most popular and easiest method of
propagation
Asexual Reproduction – involves only one parent; is the reproduction of
offspring from parts other than reproductive organs
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• Occurs when a new plant is grown from
a seed produced by the parent plant
• Is the traditional means of propagation
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• Form in a plant’s ovule through sexual
reproduction
• Growth requires the following three elements:
– light
– water
– warmth
• Are placed in grow-out operations in order to
obtain these elements and successfully
mature
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• Include the following:
– seed flats and pots
– greenhouse
– grow-out pond
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• Are shallow trays of soil in which the seeds have been
planted
• Are placed in the greenhouse to allow seedlings to
mature
• Are only used while the seedlings are first maturing,
then the plants are transferred to larger pots
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• Stores the seed flats for a short period of time
• Allows for more control over the growing
condition of the seedlings
• Permits year-long growth
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• House plants and allow them to obtain the
desired maturity or size
• Consider the following conditions:
– soil type
– availability of quality water source
– proximity to other farms
– elevation
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• May be divided into the following three
categories:
– floating
– emerged
– submerged
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• Float on the water’s surface
• Possess root systems which hang to the bottom of the
pond
• Provide aquatic animals with shelter
• Absorb nutrients from the water
• Include the following:
– azolla
– primrose creepers
– arrowhead
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• Is also known as duckweed fern,
mosquito fern and fairy moss
• Reproduces quickly and has been
known to cover entire bodies of
water
• Converts nitrogen into compounds
usable by plants, such as nitrate
and nitrogen oxide
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• Are suited for larger ponds
• Have a tendency to overtake the water’s
surface
• Possess bright yellow flowers on the
end of stems
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• Are identifiable by the large, broad
leaves found floating on the water
• Create small white flowers which
may have a purple tint
• Possess edible tubers on ends
called duck potatoes
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• Rise above the surface of the water
• Allow photosynthesis to occur more
readily
• Include the following:
– common reed
– flowering rush
– wild rice
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• Is a large perennial grass
• Is native to wetland sites in temperate
and tropic areas
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• Is also known as grass rush
• May be weedy or invasive
• Possess pink or white flowers
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• Grow in shallow waters
• Native to North America are:
– wild rice
– northern wild rice
– Texas wild rice
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• Are found completely submersed under water
and rooted to the ground
• Receive low levels of sunlight
• Include the following:
– coontail
– elodea
– potamogeton
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• Is often found in ponds, marshes and
slow running streams
• Possesses hard, brittle forked leaves
• Contains no roots, though leaves do
emerge which anchor it to the ground
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• Is also known as water weed
• Provides habitat and cover for many fish
• Is eaten by animals such as ducks and
muskrats
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• Is more commonly known as pondweed
• Produces leaves which are typically thin
and translucent due to being submerged
• Leaves are often whorled (opposite)
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1. What three elements are needed in
order for seeds to grow?
2. What are the three categories of
aquatic plants?
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3. What is the most popular and easiest
propagation method?
4. Which plant possesses large tubers on
their end called duck potatoes?
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5. Mariculture is a sub-group of agriculture.
a. true
b. false
6. Wild rice is an example of an emerged plant.
a. true
b. false
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7. Vegetative propagation requires sexual
reproduction.
a. true
b. false
8. Primrose creepers are also known as
duckweed fern.
a. true
b. false
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9. Submerged plants receive low levels of
sunlight.
a. true
b. false
10. Coontail possesses hard, brittle forked
leaves.
a. true
b. false
• Plant Management in Florida Waters
plants.ifas.ufl.edu
• Establishing an Ornamental Aquatic Plant Culture
Facility
www.ca.uky.edu
• Canadian Water Gardener
www.canadianwatergardener.com
• Aquatic Plant Propagation
www.colowatergardensociety.org
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• Mariculture
www.waterencyclopedia.com
• Strategies for Pond Management
www.txfb.org
• Propagating Aquarium Plants
www.aquaticcommunity.com
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