Chlorophyll content measurement
For ‘Pinyiensis ’ seedlings, chlorophyll content was estimated by
a portable chlorophyll meter (CL01,Hansatech , Kings Lynn, UK). The result was expressed as
“chlorophyll index” (Cassol et al.
2008). For Arabidopsis seedlings shoots and ‘Fuji’ tree leaves,
chlorophyll content was extracted and measured as previously described
(Porra et al.1989).