[Objective]The relationship between the light utilization rate of 20 main Olea europaea L.cultivars in the Sichuan Basin under the same habitat was comparatively studied,and the varieties with strong light utilization rate in the existing resources in the hilly area of the basin were screened.[Method]Taking 20 main cultivated Olea europaea L.in Sichuan Basin as the research objects,the characteristics of leaf shape,photosynthetic pigment and leaf cell structure were analyzed and compared.[Result]The results showed that Coratina had the largest leaf area and Arbosana had the smallest leaf area.Arbosana,Nikitskii Ⅱ,Manzanilla,Picual,Nikitskii Ⅰ,Zhongshan 24 and Pendolino have thinner leaf epidermal cells,with Picual being the thinnest,followed by Arbosana.The thickness of leaf fence tissue and sponge tissue ranged from 0.077 to 0.129 and 0.161 to 0.179 nm,and the highest cell structure compactness was Coratina,with 0.502,followed by Ezhi 8 with 0.489,and the low-est cell arrangement was Picual,with 0.352.The chlorophyll a content of leaves was 0.85-1.50 mg/g,the chlorophyll b content was 0.41-0.97 mg/g,the carotenoid content of leaves was 0.22-0.50 mg/g,and the photosynthetic pigment content of Coratina was the highest a-mong the 20 cultivars,and the lowest content of picual.The cultivars with the highest net photosynthetic rate(Pn)were Coratina,with 9.91 μmol/(m2·s),followed by Ezhi 8,with 9.51 umol/(m2·s),and the lowest variety was Ezhi 8,with 2.99 umol/(m2·s).[Conclusion]On the one hand,the results show that different plant organs have different sensitivity to light in morphogenesis.On the other hand,it also indicates that plants have the ability to actively adapt to the light conditions of their growing environment.Among them,Coratina,Koroneiki,Ezhi 8,Lec-cino,Chenggu,Ascolana Tenera and Frantoio are more adaptable,while Ascolana Tenera,Manzanilla,Zhongshan 24,Picual and Arbosana are less adaptable.
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