Hi,

As far as I know you can have a clue of plant water status using leaf-based sensors which measure turgor pressure continuously. I hereby report an article which clearly describes how the sensors work.

I hope to be adding some knowledge to your research on VOCs.

Kind Regards

http://www.scielo.br/scielo.php?pid=S2197-00252013000100002&script=sci_arttext

Dear Alessio, thanks for quick response. this was really helpful!

best regards

Brako

Here are several references and sources you can follow through:

http://www.seedtoday.com/articles/AgriHouse_Inc__Completes_Exclusive_License_for_Univ__of_Colorado_Water_Management_Technology_-88029.html

http://worldfoodcenter.ucdavis.edu/docs/upadhyaya_shrini.pdf

http://www.news.cornell.edu/stories/2013/10/new-micro-water-sensor-can-aid-growers

https://www.deepdyve.com/lp/elsevier/a-leaf-mounted-thermal-sensor-for-the-measurement-of-water-content-0QR8hch3No