Research On Leaf Functional Trait Differences Under Different Environmental Gradients Of Dongling Mountain

Plant functional traits have been the hot issues of ecological research. In July-August2012, we studied the intraspecific trait differences of leaf and petiole functional traits of Quercus liaotungensis Koidz and Acer truncatum along environmental gradients(elevation and slope position) in Dongling Mountain, and also conducted a preliminary study on relationship between leaf traits and petiole traits, the main conclusions as followes:1) specific leaf area (SLA), leaf dry matter content (LDMC), leaf nitrogen content and phosphorus content in leaves of different developmental stages of the Liaodong oak and Acer mono showed significant differences within species, the ratio of nitrogen and phosphorus in species was no significant differences at different developmental stages.2) leaf area (SLA) and leaf dry matter content (LDMC) of the Liaodong oak and Acer mono in different altitudinal gradient and slope position showed significant differences, the ratio of nitrogen and phosphorus in different environments gradient differences are not significant.3) the petiole traits and leaf traits of Acer mono have a significant correlation.4) petiole dry weight, petiole length/petiole dry weight, petiole dry matter content of Acer mono shows the significant differences at different developmental stages (P<0.01), There is no significant differences in petiole length at different developmental stages.5) The variation on the slope position for petiole length, petiole dry weight and petiole dry matter content of Acer mono is that uphill bit larger than the lower slope, petiole length/petiole dry weight (PL/PM) is contrast, is downhill bit larger than uphill bit, and petiole traits of Acer mono at different developmental stages have the same variation on the slope position.(6) The petiole traits of Acer mono species at different developmental stages have different discrepancy and variation along the altitudinal gradient. This shows that the petiole traits of Acer mono at different developmental stages have different response mechanism with altitudinal gradient.