In present study, net CO2 assimilation rate and stomatal conductance were decreased in both wheat cultivars under saline conditions, nonetheless, the lessening in these properties are enhanced by seed treatment of GR24.
Seed treatment with GR24 slightly increased net CO2 assimilation rate (A) and slightly reduced stomatal conductance (gs) and had non-significant effect on transpiration rate (E), sub-stomatal CO2 concentration, water use efficiency and Ci/Ca ratio.
Leaf net CO2 assimilation rate (Pn) and Gs showed a bimodal diurnal pattern (Fig.
Although PPFD was highest at 13:00 a drop of CO2 assimilation was observed (Figs.
In conclusion leaf net CO2 assimilation rate in ginkgo showed a bi-peak diurnal pattern.
Diurnal variations in gas exchange chlorophyll fluorescence quenching and light allocation in soybean leaves: The cause for midday depression in CO2 assimilation.
Key Words: CO2 assimilation rate; Nitrate reductase; Nitrite reductase; NADH-GDH; Proline
2002), and it is the initial and most profound cause of a decline of CO2 assimilation rate (Moradi and Ismail, 2007; Lawlor and Tezara, 2009).
Table II showed that CO2 assimilation rate (A) and stomatal conductance (gs) were significantly decreased at 60 and 120 mM NaCl salinity levels and both were greater at 120 mM NaCl salinity.
A = CO2 assimilation rate; gs = stomatal conductance; Ci = intercellular CO2 concentration; Ca= CO2 concentration in the ambient atmosphere surrounding the leaf