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.
Factors affecting CO2 assimilation
, leaf injury and growth in salt stressed durum wheat.
The photosynthesis rate, CO2 assimilation
rate, and stomatal conductance in response to Cd and Pb heavy metals have been well documented (Chen et al., 2012).
Root-medium applied NaCl significantly reduced net CO2 assimilation
and transpiration rates in all cotton cultivars.
Key Words: CO2 assimilation rate; Nitrate reductase; Nitrite reductase; NADH-GDH; Proline
The results from gas-exchange studies showed that salinity caused a significant decrease in stomatal conductance (gs) (James et al., 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.