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http://dx.doi.org/10.14578/jkfs.2016.105.3.303

Effects of CaCl2 on Gas Exchange and Stomatal Responses in the Leaves of Prunus serrulata  

Je, Sun Mi (Forest Ecology Division, National Institute of Forest Science)
Kim, Sun Hee (Forest Ecology Division, National Institute of Forest Science)
Publication Information
Journal of Korean Society of Forest Science / v.105, no.3, 2016 , pp. 303-308 More about this Journal
Abstract
To investigate the effect of calcium chloride ($CaCl_2$) using for deicing salts in winter on gas exchange and stomatal responses of 3-year-old Prunus serrulata, we treated twice (1 L) $CaCl_2$ solution (0.5%, 1.0% and 3.0%) in the root zone before leaf unfolding. Stomatal conductance ($g_s$), photosynthetic rate ($P_n$), transpiration rate ($T_r$) and water use efficiency (WUE) in the leaves of P. serrulata were decreased with increasing of $CaCl_2$ concentration. Even though stomatal conductance and photosynthetic rate were reduced by $CaCl_2$, intercellular $CO_2$ concentration ($C_i$) in $CaCl_2$ treatments has similar or higher values compared with control. These results suggest that non-stomatal limitation as well as stomatal limitation induced the reduction of photosynthetic rate together. On the other hands, treatment of $CaCl_2$ before leaf unfolding also affected leaf morphology traits. We proposed that reductions of stomatal length and leaf size and high pore density with increasing salinity is adaptative mechanism to reduce the water loss in plant.
Keywords
Prunus serrulata; deicing material (Calcium chloride); gas exchange; stomatal response;
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