This Article is About
pollen grains
process of fertilization
An Overview On Pollen Grains
Join 1000's of Authors at StreetArticles Today!

An Overview on Pollen Grains

Pollen grains are male reproductive particles of plant. Pollen grains are usually yellow but occasionally you can also see white, red, purple or brown pollen grains. These particles are so small in size that there is need of magnification for their detailed structure study. In flowering plants, pollens are produced in the anther sac. This anther sac is located at the tip of the filament of the stamen. However, in the case of the conifer plants, pollen is present in male cones.

Pollen grains and reproduction:

Pollen plays a very important role in the process of fertilization. They are actually male gametophytes (haploid cell structure). When mother pollen starts process of meiosis inside anther of the seed plant, half the number of chromosomes of parent plants are transferred to each of the pollen grain. Thus, nuclei of pollen contain half characteristic chromosomes of the parent plant. When a pollen combine with female part of the plant, this half number combines with the female chromosome share and a new individual plant starts developing.

Structure and formation:

Pollen is produced in microsporangium. Microsporangium is present in the anther of angiosperm flower and in male cone of conifers and other seed plants. Each pollen contain two types of cells

• Vegetative cells - these are non reproductive cells, in most of the plants there is single vegetative cell whereas in seed plants there are several.

• Generative cell - these are reproductive cells with two nuclei. One of the nuclei is known as tube nucleus. This tube nucleus produces pollen tubes. Whereas the other one is known as generative nuclei. This generative nucleus divides to form two sperm cells.

After pollination:

After pollination, the process of germination and fertilization begins. The pollen grain starts germination on the surface of stigma of the pistil. This germinated pollen grain thus produces a tube that leads its way down to the ovule present in the ovary. This path of the tube passes through style of the flower. The ovary is located at the base of the pistil. There the two different cells fuse with two different parts of the flower. Sperm nucleus fuse one cell with egg nucleus, this fusion results in to the formation of plant embryo. The other cell fuse with polar nuclei and endosperm is produced. Endosperm serves as a possible food source for the new embryo plant.

Pollen a carrier of ecological information:

According to the research conducted by a Russian biologist, pollen that successfully makes its way to the pistil of flower can transmit ecological information. Apart from this, the successful pollen also regulates evolutionary plasticity of a plant. Evolutionary plasticity is the ability of a plant to change its phenotype with possible change in the environment. If there are plenty of pollen grains, that mean means the plant is present in full favorable conditions. Like

• It is present in middle of its natural range,

• It is in ideal growing condition, with favorable weather

• And a number of male plants are present nearby.


Street Talk

No comments present
You May Also Like
What is Hay Fever? – Its Causes, Symptoms And Treatment
Hay fever is often also referred to as allergic rhinitis. It is the result of an over-reactive immune system when the affected person comes in the contact of pollen grains, dust mites, animal dander etc. It is probably one of the most common allergic reactions that people generally suffer from.…
By:  in  Health and Fitness  >  Allergies   Sep 10, 2012  
2
  Likes: 1

Discover 4 Honey Benefits for Skin And 5 Things That Honey Can Do to Improve Skin
Honey benefits for skin are many and marvelous. Honey is made by bees naturally using juices from flowers and pollen grains. Raw, unprocessed honey has no manmade substances that damage the skin. It is a clean gift of nature that can hardly cause any harm to the skin if applied…
By:  in  Womens Interests  >  Beauty Products   May 01, 2012  
3
  Likes: 14

Pollen Allergy – An Overview
You can find a lot of people these days affected by one or other kind of allergy. Pollen allergy is one of the most common among these. Actually, allergies are an over-reaction of human immune system to substances which are generally not harmful. The human immune system is designed to…
By:  in  Health and Fitness  >  Allergies   Sep 10, 2012  
2
  Likes: 0

Food Allergies And the Caurses
Allergies Allergies are becoming much more common. In some areas, over 30% of 13 and 14 years olds complain of asthma, and 40% of hay fever, and health services struggle to keep up. is the answer a crash programme to training new allergists, or are the simpler and cheaper solutions,…
By: Martha Njeri Ngugi in  Health and Fitness  >  Mind Body Spirit   Dec 23, 2012  
0
  Likes: 0

Eat A Rainbow - But Why?
Nathan Waters - totalhealthperformance Many people recommend eating all the colours of the rainbow and I believe this is good advice. Different colours contain different types of phytonutrients that help reduce the risk of chronic diseases such as diabetes, heart disease, and cancer, and they also help our immune system…
By: Nathan Waters in  Health and Fitness  >  Nutrition   Jun 08, 2016  
0
  Likes: 3

Is Fasting Healthy? - The Answer, And The Entire Point
Yes, fasting is healthy. Starving is not. There is a big difference. Whenever the topic of fasting comes up, I always think of the episode of Spongebob where Spongebob and Patrick are running from the law (because they stole a balloon, on Free Balloon Day), and Patrick accuses Spongebob of…
By: Bobby13 in  Health and Fitness  >  Nutrition   Jun 04, 2016  
0
  Likes: 1

What to Eat And Lose Weight
When it comes to what to eat and lose weight, no matter what kind of plan you are following or creating for yourself, there's going to be a few key rules you're going to want to keep in mind. They are as follows: 1. Eat what humans are designed to…
By: Bobby13 in  Health and Fitness  >  Nutrition   Jun 02, 2016  
0
  Likes: 0

What Fruits Make for The Best Smoothies
We probably don't eat enough fruit in the raw. But we value them tremendously. Especially in smoothies. They create the creamy texture and bring sweetness. Plus a whole host of nutrients. Freeze 'Em You already know this but if you want a creamy and cold smoothie without ice, freeze your…
By: James McLoughlin in  Health and Fitness  >  Nutrition   Jun 02, 2016  
0
  Likes: 0

Breakfast And Requirements Of Your Body
No one can deny the importance of breakfast, indeed the most essential meal of an individual. Unfortunately many of the people do not pay much attention towards this meal and they probably take it for granted which is very unfair. Everyone has his or her own choice regarding what to…
By: jasmine william in  Health and Fitness  >  Nutrition   May 31, 2016  
0
  Likes: 0

Fat Burners
Lose Weight Faster Than Ever Before with Phen 375… Phen 375 Formula With so many customers in the world looking to reduce weight, the weight loss product market is always going to be huge. One of the most popular supplements to enter this area is Phen 375. This formula aims…
By: sasav in  Health and Fitness  >  Nutrition   May 28, 2016  
0
  Likes: 0

Watch Out for the 9 Signs Of Dehydration
Our bodies are composed of a lot of water. For adult males, its 60% while for the ladies, its 55%. Imagine if the water levels go down significantly, all sorts of problems can set in. Whether you’re physically active or just going about your everyday routine, you can get dehydrated.…
By: Baburaj Devi in  Health and Fitness  >  Nutrition   May 16, 2016  
0
  Likes: 0

Fish Oil : Why People Take It & Why You Should Too
WHY DO PEOPLE TAKE FISH OIL SUPPLEMENTS? That's a great question. If you suggested for me to take fish oil 10 years ago I would have looked at you like you were crazy. Not anymore, within the last few years I discovered how fish oil is an extremely healthy supplement.…
By: Michael LaPoint in  Health and Fitness  >  Nutrition   May 14, 2016  
0
  Likes: 0

Everything You Want to Know About Nutritional Response Testing
Nutrition Response Testing (NRT) is a method used by trained practitioners to find out which supplement and which dosage a patient really needs. The process is followed by the means of muscle testing and using a specific protocol right from the beginning. It is known as a precise, non-invasive and…
By: Steve Dalton in  Health and Fitness  >  Nutrition   May 11, 2016  
0
  Likes: 0

Useful Details for A Quick And Healthy Weight Loss Program
In this day and age of quick work and rapid stress, people tend to grab a quick coffee and sandwich between working hours. Having wholesome and healthy food is almost passé. This is the reason that you need to know about rapid weight loss since having junk food can make…
By: MealPlans in  Health and Fitness  >  Nutrition   May 04, 2016  
0
  Likes: 1

Sports And Nutrition: A Right Blend for Enhanced Performance
The food that you consume not only affects your general health but also the benefits that you will in due course procure from your workout regime. What you consume can either add to or undermine from the benefits you derive from exercising, and if you are devoting a dedicated time…
By: Arati shah in  Health and Fitness  >  Nutrition   Apr 28, 2016  
0
  Likes: 0

Article Views: 1791    Report this Article