The BBC is inhabited by arts/media studies graduate who'd struggle to find their arse with both hands in any real job so do not discount crackpot journalism too quickly.
The only valid comment is the very last one
Commenting on the research, Dr Richard Buggs of Queen Mary, University of London, said: "This is not evidence for plant intelligence. It simply suggests that plants have a mechanism designed to automatically regulate how fast they burn carbohydrates at night. Plants don't do maths voluntarily and with a purpose in mind like we do."
the others are just soundbite rubbish to get them in the news.