Inhibition of Ethylene: Methods and Mechanisms
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Questions and Answers

What is the primary effect of ethylene on seed germination?

  • Stimulation of germination (correct)
  • Inhibition of germination
  • No effect on germination
  • Variable effect on germination depending on the crop

    • What is the effect of ethylene on the color of snap beans?

  • Enhances green color
  • Loss of green color (correct)
  • Turns color to yellow
  • No effect on color

    • What is the role of ethylene in the ripening of fruits?

  • No effect on fruit ripening
  • Stimulates fruit ripening (correct)
  • Inhibits fruit ripening
  • Variable effect on fruit ripening depending on the fruit type

    • What is the effect of ethylene on the flavor of carrots and parsnip?

    <p>Develops bitter flavor</p> Signup and view all the answers

    What is the effect of ethylene on the stems of certain vegetables?

    <p>Stimulates thickening of stems</p> Signup and view all the answers

    What is the effect of ethylene on the growth of adventitious roots on the stems of certain vegetables?

    <p>Promotes adventitious root growth</p> Signup and view all the answers

    What is the primary effect of reducing temperature on climacteric fruits?

    <p>Delay in the onset of ripening</p> Signup and view all the answers

    How does cooling affect the starch-sugar balance in certain vegetables?

    <p>It alters the starch-sugar balance</p> Signup and view all the answers

    What is the benefit of rapid pre-cooling of produce?

    <p>Helps maintain desired storage temperature</p> Signup and view all the answers

    Why is cooling below 10°C not beneficial for produce sensitive to chilling injuries?

    <p>It causes cellular damage</p> Signup and view all the answers

    What is the effect of lowering temperature on ethylene production in produce?

    <p>Decreases ethylene production</p> Signup and view all the answers

    What is the primary goal of harvesting produce in the morning when the temperature is low?

    <p>To minimize temperature fluctuations</p> Signup and view all the answers

    What is the primary mechanism by which 1-MCP inhibitors control the detrimental effects of ethylene in fruit tissues?

    <p>By blocking ethylene receptor sites through binding</p> Signup and view all the answers

    What is the effect of temperature on the rate of enzymic reactions involved in respiration in fruits and vegetables?

    <p>The rate of reaction approximates doubles for each 10°C rise in temperature</p> Signup and view all the answers

    What is the role of potassium permanganate in controlling the detrimental effects of ethylene?

    <p>It absorbs ethylene gas through oxidation</p> Signup and view all the answers

    What is the purpose of using ethylene filters/screens and sachets in fruit storage?

    <p>To absorb ethylene gas and reduce its detrimental effects</p> Signup and view all the answers

    What is the formula used to calculate the Q10 value or unknown rate for any temperature difference in enzymic reactions involved in respiration?

    <p>Q10 = (R1/R2)10(t2 –t1) = constant</p> Signup and view all the answers

    What is the relationship between Q10 and the physiological temperature range?

    <p>Q10 does not remain constant over the physiological temperature range</p> Signup and view all the answers

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