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Asexual Reproduction in Seed Plants

http://www.youtube.com/watch?v=F2ZJ19BHcHo
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A G

on 11 June 2013

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Transcript of Asexual Reproduction in Seed Plants

However there is one major problem with asexual reproduction, the environment favours certain individuals to survive and reproduce in that environment
The environment is also constantly changing and if at one time a certain species of plants was once favoured to thrive in that environment, they can easily be unfavoured as well
This is a big problem for plants that asexually reproduce because of lack of variation
Essentially they are clones of one another, and if one cannot survive in that environment, then none of them will be able to survive either, which can possibly wipe out an entire species of plant A fast increase in plant populations is often accompanied by asexual reproduction.
In plants, asexual reproduction is also sometimes called vegetative reproduction.
Species can reproduce asexually by producing rhizomes, which are underground stems from which new plants arise. Asexual reproduction in plants usually occurs by mitosis of diploid cells
Asexual reproduction generally produces genetically identical individuals (clones)
There are a lot of advantages to reproducing asexually:
-If an environment favour’s a certain plant’s traits, all its offspring benefit from the resources in the environment.
-The plant does not have to produce special reproductive structures making them use less energy and produce more offspring.
-Only one plant is needed meaning they do not need to have another individual to reproduce.
-Plantelets produced from asexual reproduction are usually more robust than young seedlings produced by sexual reproduction. This means that plantelets from asexual reproduction have a higher survival rate. Asexual Reproduction
of Seed plants Asexual reproduction of plants can be used by people in order to grow more plants and to grow plants with desirable traits
A simple method used is to take a stem cutting and place it in water, where new roots can be grown, and later transferred to soil
Asexual reproduction is also induced by other techniques, such as grafting : taking a young branch from one plant and attaching it to the roots and stems of another plant, usually one that is closely related
: the detached young bud taken from the original plant
: the plant which provides a place for the scion to be grafted onto
In grafting the cambium of the scion and stock grow together, so that eventually the vascular tissue of the two will fuse together
Grafting is also commonly used in orchards and vineyards, where a scion from a tree with desirable fruit is grafted onto all of the other plants
Although this allows for multiple copies of the plant, it leads to a low genetic diversity Some plants cannot reproduce asexually or have difficulty doing so
Scientists have developed ways around this, by culturing particular tissues
Clones of plants are grown by putting a piece of the plant into a series of culture media where they develop into a complete plant By Amy, Irene, and Ally Structures Involved in Asexual Reproduction A number of different structures can be used in Asexual reproduction, such as;
-Rhizomes: which are modified stems. Includes corms, stolons, and “eyes” on tubers
-Modified leaves
-Suckers: new shoots that grow from a plant’s roots and can form new plants
Plants can also grow from fragments of roots or shoots, such as if a part of a plant broke off, and new plant can grow from the fragment left in the soil Human Uses of Asexual Plant Reproduction Costs and Benefits of Asexual Reproduction Grafting Scion Stock
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