Wednesday, March 23, 2011

plant


Fruit
botanicaly the coconut fruit is a drupe, not a true nut. The exocarp and mesocarp make up the husk of the coconut. Coconuts sold in the shops of non-tropical countries often have had the exocarp  removed. The mesocarp or "shell" thus exposed is the hardest part of the coconut, and is composed of fiber called coir which have many traditional and commercial uses. The shell has three germination pores  or eyes that are clearly visible on its outside surface once the husk is removed

 Seed

Within the shell is a single seed. When the seed germinates, the root  of its embroy pushes out through one of the eyes of the shell. The outermost layer of the seed, the testa, adheres to the inside of the shell. In a mature coconut, a thick albuminous endosperm adheres to the inside of the testa. This endosperm or meat is the white and fleshy edible part of the coconut. Coconuts sold with a small portion of the husk cut away are immature, and contain coconut water rather than meat.

Although coconut meat contains less fat than many oilseeds and nuts such as almonds, it is noted for its high amount of medium-chain About 90% of the fat found in coconut meat is saturated, a proportion exceeding that of foods such as lard, butter, and t. There has been some debate as to whether or not the saturated fat in coconuts is less unhealthy than other forms of saturated fat. Like most nut meats, coconut meat contains less sugar and more protin than popular fruits such as bananas, apples and oranges. It is relatively high in mineral such as iron and zinc.

The endosperm surrounds a hollow interior space, filled with air and often a liquid refered to as coconut water. Young coconuts used for coconut water are called tender coconuts: when the coconut is still green, the endosperm inside is thin and tender, and is often eaten as a snack, but the main reason to pick the fruit at this stage is to drink its water. The water of a tender coconut is liquid endosperm. It is sweet  with an aerated feel when cut fresh. Depending on its size a tender contains 300 to 1,000 ml of coconut water.

The meat in a young coconut is softer and more gelatinous than a mature coconut, so much so, that it is sometimes known as coconut jelly. When the coconut has ripened and the outer husk has turned brown, a few months later, it will fall from the palm of its own accord. At that time the endosperm has thickened and hardened, while the coconut water has become somewhat bitter.

When the coconut fruit is still green, the husk is very hard, but green coconuts only fall if they have been attacked by molds, etc. By the time the coconut naturally falls, the husk has become brown, the coir has become drier and softer, and the coconut is less likely to cause damage when it drops, although there have been instances of coconuts falling from palms and injuring people, and claims of some fatalities. This was the subject of a paper published in 1984 that won the ig nobel priges in 2001. Falling coconut deaths are often used as a comparison to shark attacks; the claim is often made that a person is more likely to be killed by a falling coconut than by a shark, yet, there is no evidence of people ever being killed in this manner.


When viewed on end, the endocarp and germination pores give the fruit the appearance of a coco , a Portuguese word for a scary witch from Portuguese folklore, that used to be represented as a carved vegetable lantern, hence the name of the fruit. The specific name nucifera is Latin for nut-bearing.
A small number of writings about coconut mention the existence of the This is generally considered a hoax. Professor Armstrong, of palomar college, says "most eyewitness records of coconut pearls cited in the literature are secondhand accounts that were not observed by the authors of these articles. There are a few firsthand, published accounts of pearls observed inside coconuts, but these have been shown to be fraudulent."

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