Scientist Diana Beresford Kroeger proved that the biochemistry of humans and that of plants and trees are the same – ie the hormones (including serotonin) that regulate human and plant life are identical. What this means practically is that trees possess all the elements they need to develop a mind and consciousness. If mind and awareness are possibilities/probabilities then my next question isn’t absurd: Do trees have a heartbeat?
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According to studies done in Hungary and Denmark (Zlinszky/Molnar/Barfod) in 2017 trees do in fact have a special type of pulse within them which resembles that of a heartbeat.

To find this hidden heartbeat, these researchers used advanced monitoring techniques known as terrestrial laser scanning to survey the movement of twenty two different types of trees to see how the shape of their canopies changed.

The measurements were taken in greenhouses at night to rule out sun and wind as factors in the trees’ movements.

In several of the trees, branches moved up and down by about a centimeter or so every couple of hours.

I began to get very interested in the possibility of the bark of some trees photosynthesizing in winter as a result of my predawn meanderings in the Bosque. I noticed, for example, the pale skin of Mexican Privet and the young branches of Cottonwood trees. Both had a pale greenish tinge. I also recalled the Aspen and Poplars on my land in Maine that also had greenish bark.
 
When I was researching to write an article on Aspens I learned that the willow family that included Aspens, Cottonwoods, and Poplars as well as our Coyote Willows did indeed photosynthesize all winter long as long as temperatures stayed above freezing. If sunlight warms bark on the south - and southwest - facing sides of trunks and branches, it also makes it possible for bark to photosynthesize even when air temperatures are below freezing.
Energy produced by bark photosynthesis is thought to support regular cell maintenance in the trunk and branches and can help trees recover from defoliation due to insects, storms, or severe drought.