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Nighttime starch degradation, the circadian clock, and plant growth

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  • purple_man
    replied
    yeah who recommends that??? first time i hear this in nearly 2 decades...

    nah jayjay... the thing is, if i were to infuse you with ringer liquid supplemented with sugars and vitamins (aka "multivitamin" ringer fluid), while you are asleep, you would not wake up, in a similar way a plant would response, if you were able to disrupt/modify it's starch metabolism....

    blessss

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  • jayjayfrank
    replied
    who recommends that?

    and i bet if i splice some 'starch genes' into an indica it wouldnt flower till 10/14

    there has to be some other reason than "its because indica is indica and sativa is sativa and thats that"

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  • bigshrimp
    replied
    If starch levels are lowest as lights turn on, why is it recommended that we take cuts in the morning?

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  • purple_man
    replied
    way to go bro! please let us know, what differences if any you experience, once the ladies are dried...

    blessss

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  • Dkgrower
    replied
    Originally posted by purple_man View Post
    nope tropical sativas most of the time recieve 12/12 during whole of their life, hence shortening the period facilitates the ripening process...

    not sure dkgrower... me thinks youll have to make a comparison, one part harvested before lights up, and the 2nd half with additional 14 hours of darkness (if i understand right), note the brix readings, and after a nice cure, the smoke should be a good indicator which one worked better

    blessss
    I tryed with killer queen i harvest a good amount after i extended the dark periode by 2 houres - cutting them down in the dark

    For the other end off the spectrum i harvest again a desent amount just before ligth out -

    Ditte read the brix to much going on but they just got deleaved and are haning to dry

    I am really trying to nail the perfect harvest window and giving the last respect befor the chop chop and find this topic very important

    Bom shiva

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  • bigshrimp
    replied
    Harvest during the end of night or just after lights turn on, that is when starch levels will be lowest. If you want to ensure all reserves are used you would give them an extra couple hours of darkness. Assuming cannabis behaves the same as aradopsis.

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  • purple_man
    replied
    nope tropical sativas most of the time recieve 12/12 during whole of their life, hence shortening the period facilitates the ripening process...

    not sure dkgrower... me thinks youll have to make a comparison, one part harvested before lights up, and the 2nd half with additional 14 hours of darkness (if i understand right), note the brix readings, and after a nice cure, the smoke should be a good indicator which one worked better

    blessss

    Leave a comment:


  • jayjayfrank
    replied
    it seems to me the window of harvest becomes NightTime+10Hrs

    so if you are running 12/12, you wait for the light to go off and harvest in 22 hours(night + 10)


    also could this be related to the reason why tropical sativas should be run in a 10/14 light-dark cycle? because of how they use starch reserves at night?

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  • Dkgrower
    replied
    Originally posted by purple_man View Post
    if i remember right, the higher the brix level, the higher the ammount of all non liquid compounds is in the sample (sugars, chlorophyll, anthocyanins, ...), hence i guess the lowest measurement would provide the smoothest smoke, since we are trying to accomplish the opposite of what a refractometer is used (in vegetables and fruits, the higher the brix level -> more sugars, ... -> better flavor).

    blessss
    ps.: in tobbacco, they use glycerin to prolong the burning (keeps the tobbacco moist), the sugar, is added for better flavour and masking some of the harshness of the smoke

    Cool - thanks for clearing that up, it makes sense to go with low brix readings , so in the morning is optimal or would it be best just to keep em in the dark and harvest after 14 houres keeping them in the dark ?

    Then the plants would have minimal starch and non to very littel sugar.

    Good day to ya all

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  • purple_man
    replied
    if i remember right, the higher the brix level, the higher the ammount of all non liquid compounds is in the sample (sugars, chlorophyll, anthocyanins, ...), hence i guess the lowest measurement would provide the smoothest smoke, since we are trying to accomplish the opposite of what a refractometer is used (in vegetables and fruits, the higher the brix level -> more sugars, ... -> better flavor).

    blessss
    ps.: in tobbacco, they use glycerin to prolong the burning (keeps the tobbacco moist), the sugar, is added for better flavour and masking some of the harshness of the smoke

    Leave a comment:


  • Dkgrower
    replied
    Originally posted by purple_man View Post
    cool read bro! k+

    as you say, would make sense to extend the night before the chop (you all remember that 48 hours darness myth before chop for white widow genetix to get extra resin???), in the end to be 100% sure, one would have to harvest the same plant in 2 steps, half plant shortly before the light goes off, and the other half as soon as the light goes on aggain, then you would need to do randomized "blind" testing with couple of folks, and see what the collected data states... or get a tool for measuring the sugar content in leaves, applied by vineyards (prior to harvesting, note the values, and see whatz up, it's called a brix meter or refractometer)...

    blessss
    Its to late for me this year but i will try it next season measuring the brix mid day - afternoon and just when i pull the ligth dep = lights onn

    This brix thing is new to me and i just measured it after peak sun
    but it makes sense to measure- log it, thu the day

    I am still confused if high brix numbers are good to have when you harvest and what they suppose to be

    Again i would raise the Q - what is best alot sugar-low starch (sun set) or low starch - low sugar (moring)

    I know that they add sugars to tobacco to make a better flavor and that it burns longer

    I really dig this topic since my growing is good but i would love to make the harvest process optimal for flavor and taste - its a very important aspect

    Bom Shiva

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  • purple_man
    replied
    cool read bro! k+

    as you say, would make sense to extend the night before the chop (you all remember that 48 hours darness myth before chop for white widow genetix to get extra resin???), in the end to be 100% sure, one would have to harvest the same plant in 2 steps, half plant shortly before the light goes off, and the other half as soon as the light goes on aggain, then you would need to do randomized "blind" testing with couple of folks, and see what the collected data states... or get a tool for measuring the sugar content in leaves, applied by vineyards (prior to harvesting, note the values, and see whatz up, it's called a brix meter or refractometer)...

    blessss

    Leave a comment:


  • latetothegame
    replied
    Wow, I am glad this thread was bumped up so I noticed it. Very fascinating! (I <3 science )

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  • floral
    replied
    My (possibly faulty) interpretation is that, to avoid leaving harsh-tasting/hard-burning starches in the aboveground tissues, you'd want to chop when the starches are still in the roots, and if the plant times the degradation of starch to finish exactly when daylight is expected, having the last night be a little bit longer would catch the plant w/o any remaining starch.

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  • Dkgrower
    replied
    That was a nice read - thanks for sharing

    Originally posted by floral View Post
    How I understand it is that, if you're trying to reduce starch concentrations in the leaves of a plant, you want the last night before harvest to be longer than the plant is expecting. So 12/12 throughout blooming, but then on the last night before chop go an extra few hours later.
    But they say that a planl in a constant enviroment will use up all its starch though the night

    Also do we want sugars in the leave ? or do you all harvest in the night time or just when the lights turned on ?
    Last edited by Dkgrower; 07-28-2013, 05:56.

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