¥ Seeds Are Vital For Species That Lack Vegetative Means Of Propagation

¥ Seeds Are Vital For Species That Lack Vegetative Means Of Propagation

Length: 949 words (2.7 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

¥Seeds are vital for species that lack vegetative means of propagation. For germination of the seeds to occur there are three essential requirements, oxygen, moisture and a suitable temperature. Each species has different combination of needs to germinate in terms of these essential requirements and therefor, will remain dormant in the soil until the conditions suit. Understanding the factors that effect germination can be very useful in developing controlling strategies.
There are three types of dormancy in weed seeds, for germination to occur the dormancy has to be broken. The first is innate dormancy, this is where dormancy is already present when the seed leaves the plant, this stops germination from occurring immediately. To break this dormancy includes things such as climatic conditions, coat cracking and ripening. Enforced dormancy is where conditions do not suit germination. The last is induced dormancy, this is where dormancy was induced by some event and usually needs a trigger to break the dormancy, such as phytochrome effect. Having an understanding on what breaks theses dormancy’s is useful when devising control systems.
Time of year has a major effect when weed seeds germinate, weeds tend to germinated more at certain times of the year. The majority of the problematic weeds in New Zealand (NZ) crops are annuals that tend to germinate in spring.
A strategy to work around this is to autumn sow it if is possible for the particular crop, examples of these are pastures and lawns. This therefor limits the germination of problematic weeds; however, a large proportion of crops need to be planted in spring. Soil herbicide can also be applied to the soil to reduce seeds but generally only kill weeds as they germinate.

... middle of paper ...

...vides legislative power to restrict the establishment and spared of species
o Provides legislative power to regional councils to requires control of particular weeds in the area. Levels on Control requested:
♣ Weeds to be controlled by council
♣ Weeds to be totally controlled by owner
♣ Weeds controlled only by boundaries
♣ Weeds under consideration
♣ Plants for national pest plant account.
• The National Interest Pest response program list the 10 weeds that are trying to be eradicated and in addition the list of 100 weeds that can’t be sold
• The Ministry for Primary Industries is responsible for policing the quarantine laws
• For crop seeds to enter the country they must have an international seed certificate
The Environmental Protection Authority are responsible for deciding if new species are allowed into NZ under the Hazardous Substances and New Organisms Act

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Genetic Modification of Forest Tree Species Essay

- Biotechnology can be defined as a “collection of tools for modifying tree physiology and genetics to aid breeding, propagation and research” (Burdon and Libby 2006). These tools include the use of tissue culture, genetic engineering (genetic modification) and the use of genetic markers for marker assisted breeding (Harry and Strauss 2010). Tissue culture is the process of growing plants in a cultured medium under controlled conditions from small plant parts. The plants produced in this manner are then transferred to the greenhouse and then grow....   [tags: bioengineering, biotechnology]

Better Essays
1459 words (4.2 pages)

A Study On A Connecticut Invasive Species Essay example

- Ampelopsis brevipedunculata A Connecticut Invasive Species Throughout Connecticut, invasive plant species are taking over the unkempt spaces. One particular plant, Ampelopsis brevipedunculata, is one of these species. A. brevipedunculata goes by many names across the world; most common amongst them porcelainberry or peppervine. Like most invasive species, it was brought here as an “exotic” ornamental, prized for its colorful autumn berries. In 1870 A. brevipedunculata, was introduced into the United States from its native region of the temperate areas of Asia, most often in Japan and China....   [tags: Invasive species, Introduced species, Weed]

Better Essays
1394 words (4 pages)

Invasive Species are a Problem Essay

- Invasive species are something I think about a lot, so I decided to research them. Imagine your favorite lake, you go for a swim. While you're in the lake you step on something sharp, your foot bleeds. You stepped on a zebra mussel one of thousands of invasive species around the world. Invasive species are a real problem, a problem worth fixing,and a problem that can be remedied. An invasive species is, according to executive order 13112, a species that is not native and causes harm (1).No matter what harm a species causes, if the species is native it cannot be invasive, It can be classified instead as a nuisance ....   [tags: Not Native Species, Harmful Species, Animals]

Better Essays
1105 words (3.2 pages)

Effects Of Invasive Plant Species On Saltwater Tidal Marshes Essay examples

- Effects of Invasive Plant Species on Saltwater Tidal Marshes What is a tidal saltwater marsh or wetland. Our book (Gosselink 2000) defines a tidal saltwater marsh as adhering to the vague but, generally established definition of a wetland plus also, experiencing periodic inundation due to the effects of tide influx caused by either the moon cycle, as do tidal saltwater marshes of California, or by wind, like the tidal saltwater marshes found here in the Gulf Coast. Tidal saltwater marshes are located around the globe and can have some very different features....   [tags: Invasive species, Introduced species, Ecology]

Better Essays
1897 words (5.4 pages)

The Ethical Implications Of Cloning Extinct Endangered Species Essay

- Hank Greely, a Stanford professor who publicly supports de-extinction, acknowledges that there are important risks that should be taken into consideration before reviving lost species. Issues of animal welfare, health, environment, politics and morality should all be carefully deliberated on to determine that the good would outweigh the bad5. Many ethical drawbacks and arguments have been raised against the support of de-extinction alongside the arguments that many have against the process of cloning....   [tags: Extinction, Endangered species, Thylacine, Cloning]

Better Essays
1394 words (4 pages)

Essay about The Origin of The Species by Charles Darwin

- Darwinism is a theory developed by Charles Darwin with the help of many others. It states that natural selection is the most common cause of evolution. All species of organisms arise and grow through the natural selection of inherited variations that help increase the individual's ability to survive and reproduce in its environment. 1735 Carolus Linnaeus: He believed that God had created the world in a divine order from the simplest creatures up to human beings. He said God created struggle and competition to maintain the balance of nature....   [tags: evolution, species, organisms, environment]

Better Essays
984 words (2.8 pages)

Essay on Invasive Species And Other Biotic Factors

- The term invasive species is described as a species that is introduced into an area in which it is not native. This species has the potential to cause a negative effect to the native species and other biotic factors in those surroundings (Invasive Species, n.d). Any kind of living organism can be a potential invasive species, including the seeds and eggs of an organism (Invasive Species, n.d). These species can be brought into an area any number of ways but are usually a result of human activity (Invasive Species, n.d)....   [tags: Invasive species, Introduced species, Ecology]

Better Essays
1787 words (5.1 pages)

Essay about Darwin's On the Origin of Species by Means of Natural Selection

- In 1859, Charles Darwin published On the Origin of Species: by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life, a work which was set change our ideas on how we think about the natural world, how it works, ways in which it develops itself. Although making the briefest of commentaries about the human, parallels in thinking can be drawn on the behaviour of the natural world to the way of humans. I will look to understand nature first to analysis if our behaviour as humans is similar to that of the natural world, to understand the barriers that may effect change or to an extreme evolution....   [tags: Scientific Research ]

Better Essays
2008 words (5.7 pages)

Pine Trees of Pennsylvania Essay

- PINE TREES OF PENNSYLVANIA Pennsylvania is home to a wide variety of of evergreen tree species. Some of which include: e_hemlock_cones_full http://www.bio.brandeis.edu/ Eastern Hemlock (Tsuga canadensis) The Eastern Hemlock is often used for construction timber. The Eastern Hemlock is the offical state tree of Pennsylvania and is often found in cool moist habitats. This evergreen produces cones 3/4" long that are egg-shaped and hanging singly from the tips of twigs. Under each small section of the pine cone are 2 small, winged seeds (Cook Forest, 2013)....   [tags: evergreens, propagation]

Better Essays
1020 words (2.9 pages)

The Seeds Essay example

- The seeds of the Vietnam War were sown two decades prior to the conflict. Following the Second World War the United States adopted two foreign policies, which seemed to coexist peacefully for a time. The policies: anti-colonialism (policy against colonization of small nations) and anti-communism. Little did the United States know that the coexistence of these two policies would soon become a great paradox. Indochina had been a colony of France since the middle of the nineteenth century, within its parameter Indochina contained three nations: Cambodia, Laos, and Vietnam....   [tags: essays research papers fc]

Free Essays
2649 words (7.6 pages)