Is my plant male or female??

• Explain the response of the phytochrome system to red/far-red light
  

• • Exposure to red light converts the chromoprotein to the functional, active form (Pfr), while darkness or exposure to far-red light converts the chromophore to the inactive form (Pr).
  • Plants grow toward sunlight because the red light from the sun converts the chromoprotein into the active form (Pfr), which triggers plant growth; plants in shade slow growth because the inactive form (Pr) is produced.
  • If seeds sense light using the phytochrome system, they will germinate.
  • Plants regulate photoperiodism by measuring the Pfr/Pr ratio at dawn, which then stimulates physiological processes such as flowering, setting winter buds, and vegetative growth.

sunni said:

WAYYYYYYYYYYY too early to tell

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HappyMan420 said:

Marijuana is whats called a "Short day" plant, meaning it flowers when the night is longer than the day, hence the avg 12/12 flower times.

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LEARNING OBJECTIVE[ edit ]

• Explain the response of the phytochrome system to red/far-red light

KEY POINTS[ edit ]

• • Exposure to red light converts the chromoprotein to the functional, active form (Pfr), while darkness or exposure to far-red light converts the chromophore to the inactive form (Pr).
  • Plants grow toward sunlight because the red light from the sun converts the chromoprotein into the active form (Pfr), which triggers plant growth; plants in shade slow growth because the inactive form (Pr) is produced.
  • If seeds sense light using the phytochrome system, they will germinate.
  • Plants regulate photoperiodism by measuring the Pfr/Pr ratio at dawn, which then stimulates physiological processes such as flowering, setting winter buds, and vegetative growth.

Source: Boundless. “The Phytochrome System and Red Light Response.” Boundless Biology. Boundless, 27 Jun. 2015. Retrieved 27 Jun. 2015 from https://www.boundless.com/biology/textbooks/boundless-biology-textbook/plant-form-and-physiology-30/plant-sensory-systems-and-responses-184/the-phytochrome-system-and-red-light-response-701-11926/
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Those Pf levels need to be high enough to show signs of it's sex, so, it's not that the plant is too young, per say, but that it has not been subjected to the proper conditions to show sex yet. Sometimes, if a plant is large enough, it will cast enough shade on itself to have those Pf levels higher in some places to display sex without having to adjust flower times.

Hope this helps and keep growing

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