Question

when grass is cut with a lawn mower, it gives off a distinct aroma. why does newly-mowed grass smell a little bit sweet?

Answer 1

When the grass leaves are cut, a small amount of sugar is produced at the site of injury to plug the phloem.

Step-by-step explanation:

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Answer 2

It may smell pleasant but the plants are releasing stress signals called green leaf volatiles (GLV). this is an adaptation to warn other grass patches of the 'impending danger '. These compounds also help the grass heal it's wounds faster and prevent infections by pathogens.