Tuesday, June 03, 2008
Mr Bean and Mrs Bean (deceased)
This is a bean plant Sean brought home from school last Friday. At first there were two bean plants, but some rough play in the car caused the top 2 cm of the other bean plant to lop off.
Later in the day, I saw there was only this plant left and shouted, "What happened to the other bean plant?!"
Brian came out of his room, "I threw it away."
Me: But why??? It was still alive!
Brian: It was gonna die anyway. It had no more leaves and it can't live without leaves.
Me: Yes, it can. It still had its roots, it could still have lived, it could have grown new leaves.
Brian: No it can't. Without leaves, it can't make food.
Me: Er, I'm sure it can, it still had its roots.
Brian: Then how will it get food? You need the leaves for photosynthesis so that it can make sugar.
Me: If it can't get food without leaves, how does it grow from a seed?
Brian: The seed has nutrients and later it gets its food from a seed leaf, but once the first leaves appear the seed leaf dies.
Me (remembering something about the green parts of the leaves being essential for photosynthesis): The stem is green, so why can't it make food from the stem?
Brian: I dunno.
Me (grumbling): I still think it could have lived.
While writing this, I googled and found that "Photosynthesis takes place primarily in plant leaves, and little to none occurs in stems, etc." But I still haven't found the answer to whether the plant could have survived anyway relying on food reserves, and later on grown new leaves. Can someone help or should I lop off this bean plant too, just to see what happens?