Identification of anthocyanin-rich tea accession in different tea growing areas of Gilan province

Subject Areas : Medicinal Plants

Tahereh Rezaii ¹ , امیر صحرارو ² , Ehsan Kahneh ³ , Moazzam Hassanpur ⁴

1 - University of Guilan
2 - عضو هئیت علمی گروه باغبانی دانشکده کشاورزی- دانشگاه گیلان
3 - Tea Research Center, Horticultural Science Research Institute, AREEo, Lahijan, Iran
4 - University of guilan

Received: 2024-04-20 Accepted : 2024-09-16 Published : 2024-09-16

Keywords: Tea, genotype, anthocyanin, purple tea,

Abstract :

Diversifying products and increasing added value by producing new medicinal and health products from tea is a strategic method to improve the production situation and economize tea. In recent years, tea genotypes resulting from the natural selection of the purple-leafed variety have been introduced in some tea-growing countries. Considering that there is a possibility of the presence of such genotypes in the tea gardens of Gilan, the present research was carried out to identify and select the constant purple-colored tea plants that contain higher amounts of anthocyanins. For this purpose, through field monitoring, purple tea plants with stable color were identified and labeled from the cities of Gilan province, and then the leaves (one bud and two leaves) were examined to analyze the amount of pigments. The results showed that the environmental factors, soil nutrition and pruning operations in different places had a positive effect on the amount of pigments during the growth and development of purple tea plants. So that sample numbers 10 (12.5983 μg·g–1, DW), 19 (50.4865 μg·g–1, DW)) and 16 (10.4451 μg·g–1, DW) respectively in Lahijan and Astana Ashrafieh had the highest anthocyanin activity and the lowest anthocyanin activity in sample number 3 (1390/93 μg·g–1, DW) in Langrod city. The highest amount of chlorophyll a, total and carotenoid in sample number 35 (1.07, 1.53 and 2.49 mg·g −1 DW) respectively and the lowest amount of chlorophyll a, total and carotenoid in sample number 5, respectively (0.46, 0.71 and 1.26 mg·g −1 DW) were obtained in Astana Ashrafieh, and factors such as (radiation intensity, soil fertility, altitude above sea level and pruning operation) were involved in this phenomenon. Therefore, extractions with a higher amount and less temporal changes in the amount of anthocyanin can be monitored and studied for future research to produce tea seedlings rich in anthocyanin.

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