Abstract: In order to provide theoretical basis for selection of waterloggingtolerance varieties of Atractylodes lancea, the effects of waterlogging on physiological indexes, photosynthesis parameters and chlorophyll fluorescence parameters of A. lancea from three different sites were studied. The results showed that: (1) Along with prolonging of waterlogging stress, the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in leaves of A. lancea from the different sites increased first and then declined. The activities of SOD and POD reached the highest values on day 2 and day 6, respectively. The activities of CAT of A. lancea from Yingshan and Xinyang reached the highest value on day 2, while that from Jurong was the highest on day 4 and showed longest upward cycle and greatest maximum. The malondialdehyde (MDA) and proline (Pro) contents showed a rising trend, and were significantly higher than those in control group on day 7. (2) Along with prolonging of waterlogging stress, the net photosynthetic rate (P_n), stomatal conductance (G_s), transpiration rate (T_r) and stomatal limitation (L_s) decreased and were significantly lower than those in control group on day 7, but there was no obvious difference among the different site groups. (3) The maximum photochemical efficiency of PSⅡ (F_v/F_m) and potential photochemical efficiency (F_v/F_o) decreased, and these two indexes from Jurong site were significantly higher than those from the other two sites. Waterlogging stress had greater effects on the F_v/F_o than on the F_v/F_m. Actual photochemical efficiency of PSⅡ (F_v′/F_m′), electron transport rate (ETR), photochemical quenching coefficient (qP) and nonphotochemical quenching coefficient (NPQ) increased in the earlier days and then declined with prolonging time. Each group’s F_v′/F_m′ and ETR reached the highest values on day 1; the qP and NPQ reached the highest values on day 1 for Yingshan and Xinyang site groups, but on day 3 for Jurong site group. The assessment of physiological indexes, photosynthesis parameters and chlorophyll fluorescence parameters of A. lancea from the different sites using TOPSIS method indicated that the order of waterloggingtolerance of A. lancea varieties was Jurong> Yingshan> Xinyang.

Key words: ecological effect, Papio hamadryas, individual behavior, feeding strategy, scan sampling