*Plant Structure

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Vines


The primary function of the vine of a pumpkin is to enhance it's growth. The vine of a pumpkin plant will primarily consist of three major components- the main vines, which are attached to the pumpkins themselves and contain the leaves which help sustain the pumpkins growth, as well as the secondary vines, which grow off of the main vines, and the tertiary vines, which then sprout from the secondaries. A pumpkin plant will usually produce two to three main vines, each of which should provide you with one suitable pumpkin, provided it's growth is encouraged by not allowing more than one pumpkin plant to grow per vine. That said, it is wise to let each pumpkin sprouting from the vine grow a but before selecting the one you are going to keep, to ensure that your chosen pumpkin is best fit to survive. All secondary vines of the pumpkin should be maintained and kept trimmed to about 10 feet to encourage growth and success. Pumpkin vines also have the ability to send down excess roots wherever they have little soil around the base of the leaves. This aids in supporting the health and stability of the pumpkin plant, and therefore should be encouraged as much as possible by heaping a bit of soil around the bases of as many leaves as you can.

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Pumpkin vines post-harvest.
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A young pumpkin sprouting from the vine.
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Close up on the pumpkin stem, as it connects to the vine.
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Close up image of some main and secondary vines.
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A detailed illustration of the various elemens of the pumpkin vine
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Close up on the end of the vine.


Available Videos Regarding & Providing Visual Aid for the Pumpkin Vine:



Tendrils


The tendrils on a pumpkin are crucial for growth. They areand hairlike. While growing, the tendrils have a greenish color on the vine. These tendrils twist around objects on the ground which helps to anchor the vine and protect it from the wind. After the pumpkins are harvested, these tendrils appear to be dried and brown on the stem.
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Leaves

The leaves of a pumpkin absorb sun for the plant and help fruit growth. The pumpkin and it’s stem do not have leaves, but the vine does. When these leaves are healthy, they are green and have a lobbed shape. When the first ‘true leaves’ appear on the seedling, it is a tell-tale sign that roots have begun growing and you should transport your pumpkin from its peat pot to the garden. If the leaves ever do not appear green and lush in color, your pumpkin leaves could easily have a disease or bugs. If the leaves appear brown, it could be bacterial wilt. This is simply wilting on the leaves. The leaves can become like this due to lack of watering or high temperatures. There are however, no known remedies for bacterial wilt so its best to remove the diseased plant.
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*Flower Structure
Nikki Wells
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http://andromeda.cavehill.uwi.edu/flower_structure_and_function.htm
http://andromeda.cavehill.uwi.edu/flower_structure_and_function.htm


(Above) These are thre basic parts of a flower.
  • Both the Receptacle and the Peduncle are the flower stem, but the receptacle is also the base of the flower
  • The Sepal is located at the base of the flower and are leaf like structures. The sepals function is to protect the flower bud while it is still growing. The collection of sepal is called the Calyx.
  • The Pedal is located above the calyx. The pedals are both colorful and large. The function of the pedals is to attract pollinators to the plant. All of the pedals together are called the Corolla.
  • The male part of the flower is called the Stamen. The function of the stamen is to produce pollen grains. The stamen consists of the anther and the filament.
  • The Anther is the pollen bearing portion of the stamen, and the Filament is the stem of the stamen.
  • Pollen are grains which contain the male gametes. More specifically they are the immature male gamete with a protective outer layer.
  • The female part of the flower is the Carpel. The carpel (Pistil) consists of the stigma, style, and ovary.
  • The Stigmas function as the open surface for pollen grains and are the sticky and on top of the carpel.
  • The Style is the stem of the carpel and is located between the stigma and the ovary.
  • The Ovary is large and at the base of the carpel. The ovary contains the ovules, and when the ovary matures it becomes the fruit. (pumpkin)
  • The Ovules are located inside the ovaries. The ovules become seeds on fertilization.




http://www.hort.purdue.edu/ext/senior/vegetabl/pumpkin4.htm
http://www.hort.purdue.edu/ext/senior/vegetabl/pumpkin4.htm
http://1.bp.blogspot.com/_B8D0VRevLTc/RpWQ1v-z21I/AAAAAAAAAc4/57SZoDrRbts/s400/Pumpkin%2BFlower.jpg
http://1.bp.blogspot.com/_B8D0VRevLTc/RpWQ1v-z21I/AAAAAAAAAc4/57SZoDrRbts/s400/Pumpkin%2BFlower.jpg



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Picture From: VancouverBlueEyedGuero's
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Here is a first hand picutre showing the forced pollination of female pumpkin flowers by man!http://img.photobucket.com/albums/v139/kuehlapis/pollinate.jpg


The Dissecting Scope of a Flower Shows:
- Anthers (Left)
- Stigma (Top Center)
- Style (Top Center)
- Filament (Center)
- Pedal (Far Right)

Interactive Virtual Reality of Plant Structure:

http://www.rkm.com.au/Interactive/flower-structure.html


http://www.hgtv.com/landscaping/how-to-grow-a-giant-pumpkin/index.html
http://www.hgtv.com/landscaping/how-to-grow-a-giant-pumpkin/index.html
http://www.hgtv.com/landscaping/how-to-grow-a-giant-pumpkin/index.html
http://www.hgtv.com/landscaping/how-to-grow-a-giant-pumpkin/index.html
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http://www.hort.purdue.edu/ext/senior/vegetabl/pumpkin4.htm


(Above)These are female pumpkin flowers because they have short stems and an ovary.

http://www.hgtv.com/landscaping/how-to-grow-a-giant-pumpkin/index.html
http://www.hgtv.com/landscaping/how-to-grow-a-giant-pumpkin/index.html
http://www.rialto-restaurant.com/chef_jody_adams/images/Picture049_000.jpg
http://www.rialto-restaurant.com/chef_jody_adams/images/Picture049_000.jpg


(Above) These are male flowers because they grow father from the vine.








Interactive Virtual Reality of Plant Structure:
http://www.rkm.com.au/Interactive/flower-structure.html






Sources:

http://www.pumpkinnook.com/facts/anatomy.htm
http://www.backyardgardener.com/secert.html
http://www.howarddill.com
/
http://www.pumpkinnook.com/howto/disease.htm
http://www.flickr.com/photos/vancouverblueeyedguero/2388690718
http://andromeda.cavehill.uwi.edu/flower_structure_and_function.htm
http://www.youtube.com/watch?v=xnsJCPReWcA



*Seed Structure


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Seeds are mature, fertilized ovules of the pumpkin. The ovules are the structures of the pumpkin which contain the female gametophyte with the egg cell, which is surrounded by 1-2 integuments and the nucleus. In the angiosperm, double fertilization caused formation of the dibloid embryo as well as the triploid endosperm. The pumpkin is the "fruit" of the plant is an are mature ripened ovaries which contain the seed. The cpat pf the pumpkin is dipload maternal tissue. The mature seeds of a pumpkin commonly have an abundant endosperm layer.
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Functions of the seed structures:
  • Hilum and funiculus: A funicular scar on the coat that marks the point where the seed was attached to the ovary tissue by the funiculus.
  • Micropyle: A canal or hole in the seed coat of the nucellus where the pollen tube passes during fertilization. When the seed matures and starts to germinate, the micropyle serves as a pore through where water can enter.
  • Chalaza: The non-micropylar end of the seed. The base of an ovule, it bears an embryo sac which is surrounded by integuments.
  • Raphe: The ridge on the seed coat formed from adnate funiculus.
  • Strophiole: Outgrowth of the hilum region which restricts water movement into and out of some seeds.
  • Operculum: A little seed lid. It refers to a dehiscent cap of a seed or a fruit that opens during germination.
  • Carunculate: Seed with an excrescent outgrowth from integuments near the hilum.
  • Fibrous: Seed with stringy or cord-like seed coat.
  • Funicular: Seed with a persistent elongate funiculus attached to seed coat.
  • Fruit: The ripened ovary of a plant and its contents. A;sp known as the ripened ovary and seeds together with any structure with they are combined.
  • Elaiosomes: A specialty in the dispersal through animals is that through ants. Such seeds or fruits bear attachments, the elaiosomes that contain lures and nutriments. Myrmecochory is common with plants that live at the forest soil.
  • Caruncle: A reduced aril, in the form of a fleshy, often waxy or oily, outgrowth near the hilum of some seeds. Usually it is brightly colored. It acts as an aid to dispersal.
  • Mucilage: A layer of polysaccharide slime produced by some seeds upon imbibition. Serves in water uptake during imbibition and germination.
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