3rd International Symposium on Biodiversity Research, Erzurum, Turkey, 20 - 22 October 2021, pp.68
Oriental sweetgum (Liquidambar orientalis Mill.) is an important endemic species for both wood and non-wood use in Turkey. In the present study, it is aimed to reveal the change of photosynthetic pigment content of oriental sweetgum in summer period. The leaves collected from five oriental sweetgum individuals in the Kanuni Campus of Karadeniz Technical University were used as study material within the scope of the study. Spectrometer device was used for photosynthetic pigment determination and chlorophyll a, chlorophyll b, total chlorophyll and total carotenoid amounts were determined. Measurements were carried out in June, July and August. As a result of the analysis of variance (one-way ANOVA), it was revealed that there were statistically significant differences at 99% confidence level between the months in terms of all measured parameters. In addition, it was determined that the amount of chlorophyll a, chlorophyll b and total chlorophyll increased from June to August, while the amount of total carotenoids decreased. While the lowest values for chlorophyll a (1.15 mg/g), chlorophyll b (0.55 mg/g) and total chlorophyll (1.70 mg/g) amounts were determined in June, the highest values were determined as 2.31 mg/g, 1.48 mg/g and 3.79 mg/g in August, respectively. The highest total carotenoid amount was 0.24 mg/g in June and the lowest value was 0.08 mg/g in August. The summer period averages of oriental sweetgum were determined as 1.89 mg/g for chlorophyll a, 0.98 mg/g for chlorophyll b, 2.88 mg/g for total chlorophyll and 0.18 mg/g for total carotenoid. In the study, it was revealed that photosynthetic pigment contents showed significant differences during the summer period.