Plant processes: Difference between revisions

The cultivar constantly moves water around internally and releases water vapor into the environment through the stomata, this is the process of transpiration. The ratedensity of transpirationstomata canand behow approximatelyopen determinedthey byare will determine the rate of transpiration. The [[Temperature and Humidity#VPD|VPD]] of a plant's environment will affect its stomal response and in turn, its rate of transpiration. For higher VPD values rate of transpiration is generally higher up until a maximum threshold<ref>Plant responses to rising vapor pressure deficit, Grossiord 2020 - https://doi.org/10.1111/nph.16485</ref>. For Cannabis the maximum VPD is around 1.6kPa (Seedlings should be exposed to 0.4-0.8kPa until they are established). The rate of transpiration is also correlated to the light intensity the plant is being exposed to i.e. High light intensity equals a high rate of transpiration. TheOf ratecourse, ofthe transpirationinverse iscorrelation usefulbetween tohumidity know as it indicates theand rate of nutrienttranspiration uptake.has 97%been ofknown watersince Cannabisthe absorbs1930s.<ref>RELATIVE willHUMIDITY beVARIATIONS lostAFFECTING via transpirationTRANSPIRATION, thisHiram isF. aThut typical1938 characteristic of a C3 plant-https://doi.org/10.1002/j.1537-2197.1938.tb09265.x</ref>