Effects of drought stress and rewatering on physiological response of six shrub species[J]. Guangdong Agricultural Sciences, 2018, 45(9): 53-60. DOI: 10.16768/j.issn.1004-874X.2018.09.009
    Citation: Effects of drought stress and rewatering on physiological response of six shrub species[J]. Guangdong Agricultural Sciences, 2018, 45(9): 53-60. DOI: 10.16768/j.issn.1004-874X.2018.09.009

    Effects of drought stress and rewatering on physiological response of six shrub species

    • 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.
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