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1.3

Major VersionM

by Kailash NR

Introduction

Seeds germinate differently in different conditions. Here we compare their germination when fully submerged in water, partially submerged and totally exposed

Video Overview

    • Water kept for many days may become stale and become a breeding ground for mosquitoes and diseases. Replace with fresh water every few days.

    • Do not consume either the soaked seeds or the water.

  1. Take three types different seeds, here we have taken chana, green gram and paddy. Soak the seeds in water for 8-10 hours . Soak the seeds in water for 8-10 hours .
    • Take three types different seeds, here we have taken chana, green gram and paddy.

    • Soak the seeds in water for 8-10 hours .

  2. After 8-10 hours, drain out the water and collect the seeds. Take a cotton fabric, transfer the seeds onto it. Take a cotton fabric, transfer the seeds onto it.
    • After 8-10 hours, drain out the water and collect the seeds.

    • Take a cotton fabric, transfer the seeds onto it.

  3. Tie the cotton fabric, using elastic and leave it undisturbed for 8-10 hours. Tie the cotton fabric, using elastic and leave it undisturbed for 8-10 hours.
    • Tie the cotton fabric, using elastic and leave it undisturbed for 8-10 hours.

  4. Take a wider straw, measure and cut it for 15 cm. Using scissors. Take a wider straw, measure and cut it for 15 cm. Using scissors. Take a wider straw, measure and cut it for 15 cm. Using scissors.
    • Take a wider straw, measure and cut it for 15 cm. Using scissors.

  5. Flatten the wider straw and draw a straight line using marker. Mark the points at 1 cm , 7.5 cm and 14 cm respectively. Take a thin straw and draw the outline of it on either sides using marker.
    • Flatten the wider straw and draw a straight line using marker.

    • Mark the points at 1 cm , 7.5 cm and 14 cm respectively.

    • Take a thin straw and draw the outline of it on either sides using marker.

  6. After marking the holes on either sides of the points, heat the thick binding wire on a candle flame. Using the heated thick binding wire make holes in the wider straw as shown. After the first hole is made at the front, push the thick binding so that second hole is created as shown.
    • After marking the holes on either sides of the points, heat the thick binding wire on a candle flame.

    • Using the heated thick binding wire make holes in the wider straw as shown.

    • After the first hole is made at the front, push the thick binding so that second hole is created as shown.

  7. Follow the same procedure for all the holes and repeat it on another wider straw. Take a thin straw, measure and cut it at 6.7 cm using scissors. Take a thin straw, measure and cut it at 6.7 cm using scissors.
    • Follow the same procedure for all the holes and repeat it on another wider straw.

    • Take a thin straw, measure and cut it at 6.7 cm using scissors.

  8. Get 6 similar pieces of thin straws. Pass the thin straws into the holes made on the wider straw as shown. Pass the thin straws into the holes made on the wider straw as shown.
    • Get 6 similar pieces of thin straws.

    • Pass the thin straws into the holes made on the wider straw as shown.

  9. Insert the thin straw into both the wider straws as shown. Push the wider straws to the corner until you get a ladder structure. Push the wider straws to the corner until you get a ladder structure.
    • Insert the thin straw into both the wider straws as shown.

    • Push the wider straws to the corner until you get a ladder structure.

  10. Untie the seed sack, you will see the sprouts on the seeds Untie the seed sack, you will see the sprouts on the seeds Untie the seed sack, you will see the sprouts on the seeds
    • Untie the seed sack, you will see the sprouts on the seeds

  11. Apply dots of glue at a handful of evenly spaced locations on one of the rung of the ladder. Place the seeds on the glue . Do not apply too much glue where it covers the seed completely.
    • Apply dots of glue at a handful of evenly spaced locations on one of the rung of the ladder.

    • Place the seeds on the glue .

    • Do not apply too much glue where it covers the seed completely.

  12. Fill the glass/ container with water in such a way that the middle seed is half exposed to air and half immersed in water. Leave this setup for 1-2 days and later on start observing day by day.
    • Fill the glass/ container with water in such a way that the middle seed is half exposed to air and half immersed in water.

    • Leave this setup for 1-2 days and later on start observing day by day.

    • Make sure you check your water levels every day such that the middle seed remains partially submerged throughout your experiment (2-6 days or even longer if you want).

    • The seed on top should not come into contact with water at all.

    • Seeds may decay if the water is not changed regularly.

    • You may need to empty out the container and refill it with fresh water in case it starts smelling.

  13. Make a table with seed name and growth in  days as two columns. Under growth, you can mention these possibilities : no growth, slow, fast and fastest growth.
    • Make a table with seed name and growth in days as two columns. Under growth, you can mention these possibilities : no growth, slow, fast and fastest growth.

    • Why is it that every seed shows a different growth in shoot for same amount of water and sunlight used?

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Kailash NR

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