Compare the Difference Between Similar Terms

Difference Between

Home / Science & Nature / Science / Biology /Difference Between Pollen and Spore

Difference Between Pollen and Spore

December 29, 2011Posted byHAW

Pollen vs Spore

Diploid spore mother cells give rise to spores. Spores are haploid structures. They are important for reproduction as well as for survival in the unfavorable conditions. Spores are seen as a part of the life cycle of many organisms including plants, fungi, bacteria, algae etc. In plants, depending on the different types of spores, a plant can be homosporous or heterosporous. If the plant has only one type of spores, it is known as homospory. If the plant has two types of spores that are male and female spores, it is known as heterospory.

Spore

Almost all seed bearing plants are heterosporous. They possess large spores, which are called megaspores in the megasporangium, and small spores, which are called microspores in the microsporangium. As the spores grow they become gametophytes. The megaspores become female gametophytes and the microspores become the male gametophytes. Unlike in primitive plants, in seed bearing plants, the gametophytes are never released from the spore. This can be considered as an evolutionary advance. Due to this nature the gametophytes are well protected from desiccation. But the male sperms produced from the male gametophyte needs to reach the female egg. This is done through the dispersal of spores. Spores can be dispersed by wind, water, or insects.

Pollen

Male spores are called microspores. Microspores are also called pollen grains. In flowering plants, microspores are found inside the pollen sac or the microsporangium. Microspores are very small, minute structures. They are almost like dust particles. Each microspore has one cell and two coats. Outermost coat is the extine, and the inner one is the intine. Extine is a tough, cutinized layer. Often it contains spinous outgrowths. Sometimes it can be smooth, as well. The intine is smooth, and it is very thin. It is mainly made up of cellulose. The extine contains one or more thin places known as the germ pores through which the intine grows out to form the pollen tube. The pollen tube elongates trough the gynoecium tissues carrying two male gametes in it. Pollen tube grows down and enters the ovule through the micropyle. Then the apex of the pollen tube degrades and the two male nuclei are released in to the ovule. Double fertilization takes place by the fusion of the one male nucleus with the egg cell nucleus, giving rise to the diploid zygote, and fusion of the other male nucleus with the diploid secondary nucleus giving rise to the triploid primary endosperm nucleus.

What is the difference between Spores and Pollens?

• Spores are reproductive haploid structures and which can be large female spores, which are called megaspores, or small male spores, which are called microspores (pollens). In other words, all pollens are spores, but not all spores are pollens.

• Pollens are produced from the microspore mother cells, but female spores are produced by the megaspore mother cells.

•花粉粒有两个外套孢子外壁和外tine and female spores do not have the extine or intine.

• Pollens are dispersed by various mechanisms, but female spores are retained within the ovary.

• Pollens are found inside the pollen sac, and female spores are found inside the ovule.

Related posts:

不同年代pore and Seed不同年代pore and Seed Difference Between Pollen and Nectar Difference Between Ovary and OvuleDifference Between Ovary and Ovule Difference Between Christmas Cactus and Thanksgiving Cactus Difference Between Phylum and Division

Filed Under:BiologyTagged With:female spore,heterospory,homospory,male spore,megaspores,microspores,pollen,pollen grains,pollens,spore,spores

About the Author:HAW

Leave a ReplyCancel reply

Your email address will not be published.Required fields are marked*

Request Article

Featured Posts

Difference Between Coronavirus and Cold Symptoms

Difference Between Coronavirus and Cold Symptoms

Difference Between Coronavirus and SARS

Difference Between Coronavirus and SARS

Difference Between Coronavirus and Influenza

Difference Between Coronavirus and Influenza

Difference Between Coronavirus and Covid 19

Difference Between Coronavirus and Covid 19

You May Like

What is the Difference Between Methane and Methanol

What is the Difference Between Methane and Methanol

TCP和IP之间的区别

Difference Between ISO and Shutter Speed

Difference Between ISO and Shutter Speed

Difference Between NLT and NIV and ESV

Difference Between NLT and NIV and ESV

Difference Between Carbine and Rifle

Latest Posts

  • What is the Difference Between Induction Cooker and Normal Cooker
  • What is the Difference Between Vitiligo and Psoriasis
  • What is the Difference Between Cancellous and Cortical Bone
  • What is the Difference Between Electric and Induction Cooktop
  • What is the Difference Between Prevention and Cure
  • What is the Difference Between DSM IV and DSM V Autism
  • Home
  • Vacancies
  • About
  • Request Article
  • Contact Us

Copyright © 2010-2018Difference Between. All rights reserved.Terms of Useand Privacy Policy:Legal.