Distribution and density of stomata in two cultivars of Gerbera jamesonii and its relation to leaf conductance
by Romero-Aranda R., Cantó-Garay R., Martínez P.F. (1994)
in Scientia Horticulturae, Vol. 58, Issue 1-2, 167-173 – http://dx.doi.org/10.1016/0304-4238(94)90137-6
Stomatal density was characterized for the abaxial and adaxial surfaces of leaves on two cultivars, ‘Maria’ and ‘Goldy’, of gerbera (Gerbera jamesonii H. Bolus ex Hook.).
Determinations were performed on plants that were acclimatized in a controlled environment, and also on leaves developed at different times in the course of the growing period in a greenhouse.
Differences in stomatal density were observed between cultivars, between leaf surfaces within a cultivar and between times of sampling. The mean stomatal density in ‘Maria’ ranged from 116 to 164 stomata mm−2, and from six to 30 stomatal mm−2, respectively, for the abaxial leaf surface and for the adaxial leaf surface. In ‘Goldy’ stomatal density ranged from 138 to 194 mm−2 and from 12 to 36 stomata mm−2 for abaxial and adaxial surfaces, respectively.
Greenhouse measurements of stomatal conductance showed that the cultivar with the highest stomatal density (‘Goldy’) also had the highest conductance rate.