TITLE:
Distribution Profiles and Interrelations of Stomatal Conductance, Transpiration Rate and Water Dynamics in Young Maize Laminas under Nitrogen Deprivation
AUTHORS:
Dimitris L. Bouranis, Alexandros Dionias, Styliani N. Chorianopoulou, Georgios Liakopoulos, Dimosthenis Nikolopoulos
KEYWORDS:
N-Deprivation; Hydroponics; Zea mays; Stomatal Conductance; Transpiration Rate; Photosynthetic Rate; Response Ratios
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.5,
March
12,
2014
ABSTRACT:
Seven-day-old maize (Zea mays) plants were grown hydroponically for ten days in
N-deprived nutrient solution. The distribution profiles according to the
position on the stem of the –N laminas stomatal conductance, transpiration
rate, photosynthetic rate (1st-group) were monitored, along with the
corresponding profiles of dry mass, water amount, water content, length, surface
area, and specific surface area (2nd-group), relative to control. In
the uppermost –N laminas, the changes within a
parameter of the 1st-group were significantly higher and of the 2nd-group
significantly lower than the control, respectively. Correlations of the
corresponding values among the parameters of the 1st-or 2nd-group
were linear. The parameters between groups correlated non-linearly.
Transpiration rate was divided by the lamina’s dry mass correlated
with surface area in a power-type function. The slopes of the response ratios
linear relations between the various pairs of parameters could be used for
simulation of a lamina’s response to the
deprivation.