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I wonder what other people’s thoughts are on the subject and or experience.
My hypothisis based on a UC Berkley lecture; after all I did sleep at a Holiday Inn Express last night.
Time of lecture 27:00
A couple of nights of cold temperatures will causes faster flowering due to Vernalization.
Time of lecture 41:30
Auxin hormones such as in Superthrive can help prevent or even reverse early hermie in slightly stressed plants such as accidental light exposure or other factors during flowering by Parthenocarpy / Stenospermocarpy.
Yes, I realize this is not marijuana they are talking about however we are still talking about flowering.
The video is almost 50 minutes
http://www.youtube.com/watch?v=ux_jGpSf3h8
Cliff notes I made as well as other links for additional resources and information are included.
0:50 Flowering
Apical Meistem – In vegetation the plant is in an undifferentiated state with cells that can divide forever. When the plant gets ready to flower there is a change in the Apical Meistem it goes from being undifferentiated to differentiated and no longer able to divide forever.
http://www.sbs.utexas.edu/mauseth/weblab/webchap6apmer/6.1-1.htm
2:20
Miristem - http://en.wikipedia.org/wiki/Meristem
Differentiated has the following characteristics the MS stops making leaves, it enlarges, and production of floral parts. The Apical Meistem uses up all the cells that are not committed and then use those resources for flower/ seed production.
1) Apical Meistem stops making leaves
2) Apical Meistem Enlarges
3) Starts production of floral parts
4) Then Apex goes from Indeterminate to Determinate in state
Photoperiodism
http://en.wikipedia.org/wiki/Photoperiodism
10:10
Day Length and Plants
1) A day length which has greater than 11 hours of darkness will cause a Short Day Plant (SDP) like Marijuana to flower.
2) A Long Day Plant (LDP) is a plant that flowers only after being exposed to light periods longer than a certain critical length, as in summer. Spinach, lettuce, and some varieties of wheat.
3) Assuming enough light for photosynthesis a Day Neutral Plants (DNP) is flowered irrespective of the light period.
20:00
Something important is occurring during the dark period. It is the dark period that determines flowering.
20:50
Florigen - http://en.wikipedia.org/wiki/Florigen
1) Site of perception of the dark is measured on the leaf
2) The floral stimulus moves from the leaf to the apex causing flowers to form. The stimulus is called Florigen which is a substance that is not very well understood.
3) Florigen is the same in Long Day and Short Day Plants.
The hypothesized hormone-like molecules responsible for controlling and/or triggering flowering in plants. Florigen is produced in the leaves and acts in the shoot apical meristem of buds and growing tips
27:00
Flowering is not only affected by photoperiod but also by temperature. Many plants need a proper photoperiod plus a cold temperature.
28:00
Effects of cold on flowering are called Vernalization. While scientists know it is happening they do not know how this happens.
30:00 Heat can also promote flowering for desert plants.
39:25
Fruit Development – Fruit size and shape are related to the # of and distribution of seeds. What is that seed that affects the fruit? Seeds define the shape and size of the receptacle when the seeds are distributed through the production of Auxins.
41:14
In a strawberry the fruit is actually the outer seeds (ovual) are the fruit. While the red area, which we usually think is the fruit, is in actuality called a receptacle tissue. If you remove the ovual when it is small it never enlarges due to no supply of Auxins.
http://en.wikipedia.org/wiki/Auxin
41:30
If you remove the ovuals and the spray the strawberry with Auxins it will develop the tissue with out the fruit seeds.
41:59
Cold weather prevents tomatoes from flowering due to no pollen being developed therefore preventing fertilization. However if you spray them with Auxins they will flower with out fertilization. Fruit development with out seeds is known as Parthenocarpy.
42:55
Parthenocarpy - http://en.wikipedia.org/wiki/Parthenocarpy
Parthenocarpy (literally meaning virgin fruit) is the natural or artificially induced production of fruit without fertilization of ovules. If you eat a water melon and see the white little seeds, as apposed to the black seed, were aborted which is an example of Parthenocarpy.
Stenospermocarpy may also produce apparently seedless fruit, but the seeds are actually aborted while still small. Parthenocarpy (or stenospermocarpy) occasionally occurs as a mutation in nature, but if it affects every flower, then the plant can no longer sexually reproduce but might be able to propagate by vegetative means.
My hypothisis based on a UC Berkley lecture; after all I did sleep at a Holiday Inn Express last night.
Time of lecture 27:00
A couple of nights of cold temperatures will causes faster flowering due to Vernalization.
Time of lecture 41:30
Auxin hormones such as in Superthrive can help prevent or even reverse early hermie in slightly stressed plants such as accidental light exposure or other factors during flowering by Parthenocarpy / Stenospermocarpy.
Yes, I realize this is not marijuana they are talking about however we are still talking about flowering.
The video is almost 50 minutes
http://www.youtube.com/watch?v=ux_jGpSf3h8
Cliff notes I made as well as other links for additional resources and information are included.
0:50 Flowering
Apical Meistem – In vegetation the plant is in an undifferentiated state with cells that can divide forever. When the plant gets ready to flower there is a change in the Apical Meistem it goes from being undifferentiated to differentiated and no longer able to divide forever.
http://www.sbs.utexas.edu/mauseth/weblab/webchap6apmer/6.1-1.htm
2:20
Miristem - http://en.wikipedia.org/wiki/Meristem
Differentiated has the following characteristics the MS stops making leaves, it enlarges, and production of floral parts. The Apical Meistem uses up all the cells that are not committed and then use those resources for flower/ seed production.
1) Apical Meistem stops making leaves
2) Apical Meistem Enlarges
3) Starts production of floral parts
4) Then Apex goes from Indeterminate to Determinate in state
Photoperiodism
http://en.wikipedia.org/wiki/Photoperiodism
10:10
Day Length and Plants
1) A day length which has greater than 11 hours of darkness will cause a Short Day Plant (SDP) like Marijuana to flower.
2) A Long Day Plant (LDP) is a plant that flowers only after being exposed to light periods longer than a certain critical length, as in summer. Spinach, lettuce, and some varieties of wheat.
3) Assuming enough light for photosynthesis a Day Neutral Plants (DNP) is flowered irrespective of the light period.
20:00
Something important is occurring during the dark period. It is the dark period that determines flowering.
20:50
Florigen - http://en.wikipedia.org/wiki/Florigen
1) Site of perception of the dark is measured on the leaf
2) The floral stimulus moves from the leaf to the apex causing flowers to form. The stimulus is called Florigen which is a substance that is not very well understood.
3) Florigen is the same in Long Day and Short Day Plants.
The hypothesized hormone-like molecules responsible for controlling and/or triggering flowering in plants. Florigen is produced in the leaves and acts in the shoot apical meristem of buds and growing tips
27:00
Flowering is not only affected by photoperiod but also by temperature. Many plants need a proper photoperiod plus a cold temperature.
28:00
Effects of cold on flowering are called Vernalization. While scientists know it is happening they do not know how this happens.
30:00 Heat can also promote flowering for desert plants.
39:25
Fruit Development – Fruit size and shape are related to the # of and distribution of seeds. What is that seed that affects the fruit? Seeds define the shape and size of the receptacle when the seeds are distributed through the production of Auxins.
41:14
In a strawberry the fruit is actually the outer seeds (ovual) are the fruit. While the red area, which we usually think is the fruit, is in actuality called a receptacle tissue. If you remove the ovual when it is small it never enlarges due to no supply of Auxins.
http://en.wikipedia.org/wiki/Auxin
41:30
If you remove the ovuals and the spray the strawberry with Auxins it will develop the tissue with out the fruit seeds.
41:59
Cold weather prevents tomatoes from flowering due to no pollen being developed therefore preventing fertilization. However if you spray them with Auxins they will flower with out fertilization. Fruit development with out seeds is known as Parthenocarpy.
42:55
Parthenocarpy - http://en.wikipedia.org/wiki/Parthenocarpy
Parthenocarpy (literally meaning virgin fruit) is the natural or artificially induced production of fruit without fertilization of ovules. If you eat a water melon and see the white little seeds, as apposed to the black seed, were aborted which is an example of Parthenocarpy.
Stenospermocarpy may also produce apparently seedless fruit, but the seeds are actually aborted while still small. Parthenocarpy (or stenospermocarpy) occasionally occurs as a mutation in nature, but if it affects every flower, then the plant can no longer sexually reproduce but might be able to propagate by vegetative means.