Saturday, June 28, 2014

TOPS Green Thumbs - Radishes (part 6)

I promise, this is the last post about experimenting with radishes :-) By now, you probably got enough of it, but we are still ... learning and Jaś is still quite interested in observing his tiny plants grow.

This week we finished all previously started experiments. Let's take a look at them:


DAY 21 - SUNDAY
GEOTROPISM

After two days we were able to observe which part of the plant is positively (roots) geotropic and which negatively (hypocotyl).


DAY 22 - MONDAY

GROW, GROW, GROW - GRAPH

After carefully observing the growth of four seedlings and making notes of how many millimeters they have grown each day, it was time to make a growth graph for each seedling.
It turned out that our seedlings were growing much faster than the examples shown in book.



LIVING SPACE

This experiment was started on day 5. Now the plants have grown and are ready to be analysed, and just as predicted the seedling that were growing in overcrowded conditions are smaller and weaker and the one growing by itself is strong and much bigger with developing true leaves.






DAY 24 - WEDNESDAY

TOXIC STRESS

Let's check what happened to the seeds in vinegar, saline water and clear water?



 
DAY 26 - FRIDAY

GRID WORK




From the pictures below you can see how our radishes have grown over 3 weeks:



HYDROTROPISM

We were observing the reaction of growing roots to the change in moisture. The roots once they got to the dry glass of the jar started growing upwards, they did not want to "leave" the wet paper towel.



SEED LEAF OR TRUE LEAF

There was one more experiment for the last day of our study - it was about leaves.
Did you know that true leaves start growing after 2 weeks? In the beginning there are no leaves, just cotyledons, which are heart shaped, have less veins and smooth edges.


 
The month long lesson on sprouting and growth of radishes (and plants in general) has come to an end.

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