It was no important differences found in the rate of transpiration. However, the maximum value of 3.20 mmol
H2O m-2s-1 (V2 at 200 cm) was noticed for the top of the plant, followed by a very closed value at V2 (70 cm), 3.17
mmol H2O m-2s-1 in the case of the bottom part of the plant. The others registered results were around the above.
Stomatal conductance (gs) and its opposite parameter, stomatal resistance (rs) are measures of water vapors losses
and theoretically, higher values of gs are related to a great transpiration rate at leaf level. In this researchm it can be
noticed that transpiration increased from the early plant stage to the followings, from the bottom part until top of the
plant, but lower values were registered in the middle plant area, for all analyzed variants. This parameter does not
have the same evolution as photosynthesis, even if the stomatal pore is the entry point for the carbon dioxide. In
fact, water use efficiency depends on transpiration rate and assimilation rate in the same time (Li et al., 2012).
Plant growth and development depend on source-sink interaction, net assimilation and assimilates translocation
which must be in balance (Gifford and Evans, 1981). In this regard, different pruning procedures should be applied
to achieve such goals.
Data concerning C. sativus growth capacity are presented in Table 2. As we can see, concerning the total plant
height, highest value has been registered by V3 (256 cm). For the others two variants, the values were 238 cm,
indicating that plants manifest a relative uniformity.