Basic photosynthetic parameters of the OJIP transient curves.

<p>Values were listed as Mean ± SD. Independent-samples <i>t</i> test was used to determine statistical differences. Different letters indicate statistical difference significance at <i>P</i> < 0.05 among the treatments. NT means normal temperature (30°C), and LT means low temperature (4°C). CK was control that treated with sterilized water, SNP was plant treated with SNP, P+L was plant treated with PTIO and L-NAME.</p><p>Basic photosynthetic parameters of the OJIP transient curves.