Treated by freezing,1-year-old dormant branches of four Parthenocissus species were used as test materials to determine the *** to Logistic equation fitting,the semi-lethal low temperatures were *** result showed that...
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Treated by freezing,1-year-old dormant branches of four Parthenocissus species were used as test materials to determine the *** to Logistic equation fitting,the semi-lethal low temperatures were *** result showed that the semi-lethal low temperatures and freezing tolerance of the examined species were ranked as: Parthenocissus quinquefolia(-16.63 ℃),***(-10.78 ℃),***(-10.29 ℃),and ***(-7.72 ℃).By comparing several physiological indexes including water saturation deficit,soluble sugar,soluble protein,MDA,and proline contents,it was found that after cold stressing for a whole winter the soluble sugar and proline contents were well correlated to semi-lethal low *** both of them could be used as the physiological indexes for cold tolerance identification and selection of cold-resistant variety.
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