Outbreeding devices class 12

To outbreeding devices class 12 the outbreeding devices, classifications, and related factors like pollen—pistil interaction and man-made hybridisation. This section is about the outbreeding device concept and the relationship between pollen pill interaction and outbreeding. Outbreeding devices refers to the processes or mechanisms that plants use to avoid self-pollination.

The process of transfer of pollen grains from the anther of a male flower to the stigma of the female flower is known as Pollination. Pollination can be of two types which are cross-pollination and self-pollination. Most of the plants are bisexual or hermaphrodite which promotes self-pollination. Is this self-pollination desirable? What are the factors promoting cross-pollination? The sequence of events, which is carried out from the time of pollen deposition over the stigma and till the entry of the pollen tube inside the ovule is called pollen pistil interaction.

Outbreeding devices class 12

Flowers are beautiful, right? What is pollination? The transfer of pollen grains from the anther of one flower to the stigma of the same or different flower is called as pollination. Pollination can be of two types:. Continued inbreeding or self- fertilization leads to a condition called as inbreeding depression. This condition is characterized by homozygous genes which are not as vital as they need to be leading to unhealthy offsprings. In self- pollination, since both the male and female gametes share the same genes, there is no genetic variation seen which is necessary for a better, more productive offspring. So, most plants have many mechanisms that they employ to avoid self -pollination and promote cross-pollination. Plants have many mechanisms and devices that they employ to promote cross-pollination. Let us look at a few of them in the following segments:. Pollination described above is just the beginning or rather the first step of pollen-pistil interaction. The pistil is the female reproductive part of a flowering plant comprising of the ovary, style, and stigma.

Posted by Gowtham C S 3 years, 6 months ago. Join courses with the best schedule and enjoy fun and interactive classes. Flowers are beautiful, right?

The pistil is the female reproductive part of a flowering plant, while pollen grains are the male reproductive part of a plant. Pollination is the first step of pollen pistil interaction, followed by the pollen adhesion to the stigma. Now, we'll be heading towards our next section, which is a pretty interesting one: the concept of outbreeding devices in plants. Image will be uploaded soon. The section is related to the concept of outbreeding devices and the relationship between pollen pistil interaction and outbreeding devices. What is The Meaning of Outbreeding Devices? But why do plants use such devices?

The pistil is the female reproductive part of a flowering plant, while pollen grains are the male reproductive part of a plant. Pollination is the first step of pollen pistil interaction, followed by the pollen adhesion to the stigma. Now, we'll be heading towards our next section, which is a pretty interesting one: the concept of outbreeding devices in plants. Image will be uploaded soon. The section is related to the concept of outbreeding devices and the relationship between pollen pistil interaction and outbreeding devices. What is The Meaning of Outbreeding Devices? But why do plants use such devices? The important reasons are mentioned below. Inbreeding Depression: The reason behind the adoption of such techniques by plants is that due to continued inbreeding, plants can develop a condition called inbreeding depression, leading to unhealthy offspring.

Outbreeding devices class 12

To understand the outbreeding devices, classifications, and related factors like pollen—pistil interaction and man-made hybridisation. This section is about the outbreeding device concept and the relationship between pollen pill interaction and outbreeding. Outbreeding devices refers to the processes or mechanisms that plants use to avoid self-pollination. Unisexuality: This is an Outbreeding technique in which the plant bears either male or female flowers.

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The next section is the final section of the discussion and enumerates the steps of pollen pistil interaction. The pollen-pistil interaction begins with pollination, followed by pollen adhesion to the stigma. Suggested Videos. Select your account. The main reasons are listed below. Related links. Upon reaching the pistil, the pollen grain releases chemicals which are recognised by the pistil. Unisexuality: This is an Outbreeding technique in which the plant bears either male or female flowers. The important reasons are mentioned below. Most of the plants are bisexual or hermaphrodite which promotes self-pollination. Start Quiz. Meaning of Outbreeding Devices Outbreeding devices refers to the processes or mechanisms that plants use to avoid self-pollination. Here, the two male nuclei fuse with the megaspore and the vegetative nucleus to form the diploid zygote and the triploid endosperm respectively. The flowchart of malaria.

Flowers are beautiful, right?

Maize plants, for example Protogyny — The gynoecium matures prior to the androecium Herkogamy: Herkogamy refers to a condition that occurs naturally and prevents pollen grains from entering the ovaries. Zoology Zoology is the branch of biology that is concerned with the study of the animal kingdom. No products in the cart. Change number Resend OTP. Outbreeding devices are mechanisms which are followed and adapted by the plants in order to prevent self pollination. I agree to the terms and conditions and privacy policy. The following section is the last part of the discussion and lists the steps for pollen pistil interaction. Here, the two male nuclei fuse with the megaspore and the vegetative nucleus to form the diploid zygote and the triploid endosperm respectively. Select your account. Pollination can be of two types which are cross-pollination and self-pollination. Tanmay January 23, at pm.