| The physiological changes of Schefflera odorata cv. Variegata, Ixora chinensis, Gardenia
jasminoides var. fortuniana, Ervatamia divaricata, Allemanda cathartica and Excoecaria cochinchinensis were
studied under drought stress and rewatering in a greenhouse. This study also evaluated their drought resistance
through physiological parameters and principal components analysis. The results showed that the leaf water content
of these seedlings decreased during drought stress and S. odorata cv. Variegata, I. chinensis and E. cochinchinensis
returned to the controls level after rewatering. The chlorophyll content, proline content, soluble protein content, soluble
sugar content, MDA contents, relative conductivity and SOD activity increased or significantly increased during
drought period. After rewatering, the chlorophyll content of E. divaricata, A. cathartica and E. cochinchinensis,
protein content of E. divaricata, MDA contents of I. chinensis recovered to the control level. The soluble sugar content
of most species restore to the status of the controls except S. odorata cv. Variegata. The relative conductivity of S.
odorata cv. Variegata, relative conductivity and SOD activity of G. jasminoides var. Fortuniana, E. divaricata and E. cochinchinensis recovered to the control level. Seedlings’physiological properties were evaluated using principal
component analysis, and their ability of drought resistance was sequenced as S. odorata cv. Variegata ＞ E. divaricata
＞ E. cochinchinensis ＞ A. cathartica ＞ G. jasminoides var. fortuniana ＞ I. chinensis. |
