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#1
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Question on self-incompatable flowers
I have found several sites which mention how a flower stops it's own pollen
from fertilizing it, but none mention if this same flower can accept pollen from a compatible plant while holding back it's own pollen. In other words, if pollinated with it's own pollen, will the bloom die, or is it still accepting of a 2nd pollen? Solanaceae is the family in question, Brugmansia specifically. Rumor has it that the breeding potential of the bloom is ruined if self pollinated, and yet the pistil is often located among or behind the pollen bearing anthers, which is a very poor design if this is the case. I don't think nature would be so careless, but .....? |
#2
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Question on self-incompatable flowers
Brugmansia will only accept the first pollination.
This is why great care must be taken while harvesting pollen bearing anthers if you intend to use the same flower as a pod parent. Shirley |
#3
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Question on self-incompatable flowers
"BrugsRus" wrote in message ... I have found several sites which mention how a flower stops it's own pollen from fertilizing it, but none mention if this same flower can accept pollen from a compatible plant while holding back it's own pollen. In other words, if pollinated with it's own pollen, will the bloom die, or is it still accepting of a 2nd pollen? Solanaceae is the family in question, Brugmansia specifically. Rumor has it that the breeding potential of the bloom is ruined if self pollinated, and yet the pistil is often located among or behind the pollen bearing anthers, which is a very poor design if this is the case. I don't think nature would be so careless, but .....? wrote in message oups.com... Brugmansia will only accept the first pollination. This is why great care must be taken while harvesting pollen bearing anthers if you intend to use the same flower as a pod parent. Shirley No disrespect intended to the poster, but I am looking for something more substantial than a statement? Can anyone please direct me to a reputable (scientific) site where information on this general topic can be found? (Not one of the collectors groups please; Fanciers groups are indeed pleasant and useful in many ways, but have the occasional tendency to accept un substantiated claims as botanical fact). |
#4
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Question on self-incompatable flowers
Did you look in Agricola and Uncover for the enlightenment you seek?
"BrugsRus" wrote in message ... "BrugsRus" wrote in message ... I have found several sites which mention how a flower stops it's own pollen from fertilizing it, but none mention if this same flower can accept pollen from a compatible plant while holding back it's own pollen. In other words, if pollinated with it's own pollen, will the bloom die, or is it still accepting of a 2nd pollen? Solanaceae is the family in question, Brugmansia specifically. Rumor has it that the breeding potential of the bloom is ruined if self pollinated, and yet the pistil is often located among or behind the pollen bearing anthers, which is a very poor design if this is the case. I don't think nature would be so careless, but .....? wrote in message oups.com... Brugmansia will only accept the first pollination. This is why great care must be taken while harvesting pollen bearing anthers if you intend to use the same flower as a pod parent. Shirley No disrespect intended to the poster, but I am looking for something more substantial than a statement? Can anyone please direct me to a reputable (scientific) site where information on this general topic can be found? (Not one of the collectors groups please; Fanciers groups are indeed pleasant and useful in many ways, but have the occasional tendency to accept un substantiated claims as botanical fact). |
#5
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Question on self-incompatable flowers
This info was taught to me by my mentor Monika Gottschalk a world
renowned breeder of brugmansia. You can visit her site http://www.monika-gottschalk.de/ She is a very kind and generous person and will surely answer your questions. It is getting close to her busy season but for now she is snowed in and should be able to answer you. Cheers from here , Shirley in USA BrugsRus wrote: "BrugsRus" wrote in message ... I have found several sites which mention how a flower stops it's own pollen from fertilizing it, but none mention if this same flower can accept pollen from a compatible plant while holding back it's own pollen. In other words, if pollinated with it's own pollen, will the bloom die, or is it still accepting of a 2nd pollen? Solanaceae is the family in question, Brugmansia specifically. Rumor has it that the breeding potential of the bloom is ruined if self pollinated, and yet the pistil is often located among or behind the pollen bearing anthers, which is a very poor design if this is the case. I don't think nature would be so careless, but .....? wrote in message oups.com... Brugmansia will only accept the first pollination. This is why great care must be taken while harvesting pollen bearing anthers if you intend to use the same flower as a pod parent. Shirley No disrespect intended to the poster, but I am looking for something more substantial than a statement? Can anyone please direct me to a reputable (scientific) site where information on this general topic can be found? (Not one of the collectors groups please; Fanciers groups are indeed pleasant and useful in many ways, but have the occasional tendency to accept un substantiated claims as botanical fact). |
#6
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Question on self-incompatable flowers
"Cereus-validus-..........." wrote in message . com... Did you look in Agricola and Uncover for the enlightenment you seek? "BrugsRus" wrote in message ... "BrugsRus" wrote in message ... I have found several sites which mention how a flower stops it's own pollen from fertilizing it, but none mention if this same flower can accept pollen from a compatible plant while holding back it's own pollen. In other words, if pollinated with it's own pollen, will the bloom die, or is it still accepting of a 2nd pollen? Solanaceae is the family in question, Brugmansia specifically. Rumor has it that the breeding potential of the bloom is ruined if self pollinated, and yet the pistil is often located among or behind the pollen bearing anthers, which is a very poor design if this is the case. I don't think nature would be so careless, but .....? wrote in message oups.com... Brugmansia will only accept the first pollination. This is why great care must be taken while harvesting pollen bearing anthers if you intend to use the same flower as a pod parent. Shirley No disrespect intended to the poster, but I am looking for something more substantial than a statement? Can anyone please direct me to a reputable (scientific) site where information on this general topic can be found? (Not one of the collectors groups please; Fanciers groups are indeed pleasant and useful in many ways, but have the occasional tendency to accept un substantiated claims as botanical fact). Thank you. While I did not find the answer there ($75 membership required) I did find additional leads which show this rumor to be false, since the pollen tubes of self grains are not even allowed to reach the ovary, while other grains which are deposited within the acceptable time frame are allowed to grow as usual. A brief piece from http://pbi-ibp.nrc-cnrc.gc.ca/en/bul...sue1/page6.htm explains it in perhaps the easiest terms of the many pages I was referred to; "During a compatible pollination event, pollen grains that have landed on the stigmatic surface at the top of the pistil will adhere to the stigmatic cells, hydrate, germinate and form pollen tubes. The actively growing pollen tubes are often capable of penetrating the stigmatic cell walls to grow down through the style and finally reach the ovary to deliver sperm for fertilization. In self-incompatible pollen-pistil interactions, many of these steps may be blocked following the recognition of self-pollen. As a result, this response prevents inbreeding and promotes out-crossing between unrelated individual plants (reviewed in Lord and Russell, 2002)." To the first poster, Thank you, but the link did not work. Your friend may have assumed this to be the case from her own experience in her garden, but it is better to study from the science of many, than the experience of one. |
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