General Question

arnbev959's avatar

Why do some fruits have a groove on the side them?

Asked by arnbev959 (10841 points ) September 7th, 2008

Some fruits are round and smooth all the way around. Like apples and pears and tangerines.

But some fruits have a furrow running down the side. Plums and peaches have it. Why do some fruits grow with a groove, and others without one?

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10 Answers

Lovelocke's avatar

Hmm. Probably because the fruit meat grows around a large, central seed (the pit found in peaches and plums).

Allie's avatar

Hmm.. but avocados don’t have a groove in them and they grow around a large pit/seed.
Now I’m curious..

loser's avatar

That’s so they’ll fit in the slingshot.

Lovelocke's avatar

Could be a different case… Avocadoes actually fit in as a berry… Like a cherry.

Allie's avatar

Damn, I was shocked when I found out avocados were a fruit. Now I find out it’s a berry… very strange.

eambos's avatar

Is it possible that peaches are dicots (like beans)? This means that they have two halves to the seed.

Harp's avatar

This groove is called the “ventral suture”, and is a vestige of the structure of the carpel (the central seed-bearing organs of the flower).

In some flowers, the carpels are composed of multiple segments that are fused along their edges to form the protective envelope where the seeds will develop. In the case of the fruits you’re talking about, especially members of the genus Prunus (plums, peaches apricots, cherries…), the carpels have one segment that folds around and seals at its single edge. It is this suture that appears in the mature fruit as a groove

scamp's avatar

Wow! All this time I thought a berry was a fruit! I learned something new today thanks to fluther.

Knotmyday's avatar

Hooray for Harp!

asmonet's avatar

Maybe it’s like when some dudes have ‘seams’ on their naughty bits. :-p

I need sleep.

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