Why siphonogamy is considered to be fertilisation?

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Discussion Overview

The discussion revolves around the classification of siphonogamy as a type of fertilization in seed plants. Participants explore the definitions and processes involved in fertilization, comparing them to siphonogamy and questioning the distinctions between them.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • One participant defines fertilization as the fusion of gametes, while siphonogamy is described as the transfer of male gametes to female gametes via a pollen tube, leading to confusion about their relationship.
  • Another participant suggests that the core of fertilization involves transferring haploid genomes, which occurs similarly in both animal fertilization and siphonogamy, despite differences in the mechanisms.
  • A participant questions whether insemination in humans can be considered part of fertilization, drawing parallels to siphonogamy.
  • Some participants clarify that siphonogamy includes both the delivery of pollen to the female gamete and the transfer of its genetic material, similar to the processes in animal fertilization.
  • One participant expresses that the definition of fertilization provided earlier aligns with their understanding, while another indicates that the distinction lies in the processes following the entry into the micropylar region of the embryosac.
  • There is a query about why the process of transferring gametes to the embryosac is not considered separate from the transfer of the genome.

Areas of Agreement / Disagreement

Participants express differing views on whether siphonogamy should be classified as a type of fertilization. While some find the definitions and processes to align, others remain uncertain about the distinctions and implications of these classifications.

Contextual Notes

Participants highlight that the definitions of fertilization and siphonogamy may depend on specific interpretations and that the processes involved can vary significantly between different biological contexts.

Frigus
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According to me fertilisation is fusion of gametes and siphonogamy is transfer of male gamete to the female gamete with the help of pollen tube.
According to these definitions it feels to me that fertilisation is process in which male and female gametes interact and fuse to form zygote.
Now problem is that it didn't make any sense to me that we are saying siphonogamy is a type of fertilisation in seed plants as siphonogamy seems something different from fertilisation.
Can you please tell me why siphonogamy is considered to be a part of fertilisation but not a different process.
 

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The process of fertilization involves the transfer of one of two parents haploid genomes into the cell of another.
This occurs in both animal fertilization and pollenation.
The process of how the transfer is achieved is what differs with siphonogamy. This is a a functional different in a detail of the overall fertilization process. In the larger view (of combining haploid genomes), the processes are the same.

Now I am wondering what it is called in fungi.
 
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BillTre said:
The process of fertilization involves the transfer of one of two parents haploid genomes into the cell of another.
This occurs in both animal fertilization and pollenation.
So can we that insemination in humans is a part of fertilisation.
 
Hemant said:
So can we that insemination in humans is a part of fertilisation.
It would be the process of getting the sperm into vicinity of the egg(s) so that they can fertilize.
The siphonogamy is the process of the plant equivalent of sperm (pollen) growing out a cell process that actually gets to the plant equivalent of an egg and then actually transferring its haploid genome to the ova.
 
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BillTre said:
It would be the process of getting the sperm into vicinity of the egg(s) so that they can fertilize.
The siphonogamy is the process of the plant equivalent of sperm (pollen) growing out a cell process that actually gets to the plant equivalent of an egg and then actually transferring its haploid genome to the ova.
I got it,
If we consider the definition of fertilisation given by you then it makes sense and this definition seems to be very appropriate to me.
Thanks.
 
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I think I have misinterpreted what you have written,it is not definition of fertilisation that solved my problem as it is same.
Please correct me if I am wrong.
I understood that in siphonogamy transfer of genome to another gamete is done differently and siphonogamy also involves the process after entry into micropylar region of embryosac and not only entry into micropylar region of embryosac.
 
My understanding is that siphonogamy involves both getting the sperm equivalent (pollen) to the location where the female gamete is, as well as transferring its DNA into the female gamete.

Animal fertilization involves the transfer of the DNA into the female gamete. However, getting the sperm to the location of the female gamete involves the insemination process (for internally fertilized animals (such as mammals, birds, some fish, insects)). Externally fertilized animals (like many fish and frogs) release males gametes outside of the female animal in coordination with female gamete release, however this has to be done at the appropriate time and situation.
 
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BillTre said:
My understanding is that siphonogamy involves both getting the sperm equivalent (pollen) to the location where the female gamete is, as well as transferring its DNA into the female gamete.
Can I also know why process of transferring gamete to embryosac is not considered to be different than transferring genome.
 

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