Journal ArticleDOI
Phytochemical analysis of mite-infested tea leaves of Darjeeling Hills, India
Piu Banerjee,Moinul Islam,Arghya Laha,Himani Biswas,Nimai Chandra Saha,Goutam Kumar Saha,Debjani Sarkar,Srijit Bhattacharya,Sanjoy Podder +8 more
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TLDR
The increase in phenolic and alcoholic components and decrease in Chl contents may affect the quality of Darjeeling tea and the extent of damages done by the pests measured here could aid the pest management in tea gardens.Abstract:
Introduction Darjeeling tea of India is one of the most famous beverages globally. However, a large amount of tea crop is damaged every year by the attack of mites. Objectives The study aimed to determine the changes in different pigments and biochemical components of tea leaves due to mite infestation. Materials and methods We used UV-visible and Fourier-transform infrared (FTIR) spectroscopy simultaneously to understand the damages in pigment contents of the leaves of tea (Camellia sinensis (L.) Kuntze) due to attack of phytophagus mite, Oligonychus coffeae Nietner. Furthermore, chemical analysis of infested tea leaves was also performed to compare the nutrients of the plants, namely total phenol, protein and soluble sugar. Results The UV-visible study reveals severe reduction of the pigments such as chlorophyll (Chl), carotenoids and xanthophylls in the tea leaf due to mite infestation. The findings of the FTIR study, also shows variation in different physiochemical components in the leaf Chl. The sugar and protein content of the infested leaves have been reduced compared to uninfested ones. Results in the case of tea leaves plucked during first (March) and third (November) flushes show similar trends. Conclusion The increase in phenolic and alcoholic components and decrease in Chl contents may affect the quality of Darjeeling tea. The extent of damages done by the pests measured here could aid the pest management in tea gardens.read more
Citations
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TL;DR: In this article , the effect of Tetranychus urticae mites on the occurrence and concentration of cannabinoids and terpenes in cannabis leaves and flowers was examined.
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Zhanghua Xu,Anqi He,Yiwei Zhang,Zhenbang Hao,Yifan Li,Songyang Xiang,Bin Li,Ling-yan Chen,Hui Yu,Wanling Shen,Xu-ying Huang,Xiaoyu Guo,Zeng Da Li +12 more
References
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Journal Article
Protein Measurement with the Folin Phenol Reagent
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Copper enzymes in isolated chloroplasts. polyphenoloxidase in beta vulgaris
TL;DR: Evidence that a copper enzyme, polyphenoloxidase (otherwise known as tyrosinase or catecholase), is localized in the chloroplasts of spinach beet (chard), Beta vu?garis is presented.
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Analysis of total phenols and other oxidation substrates and antioxidants by means of folin-ciocalteu reagent
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Chlorophylls and carotenoids: Pigments of photosynthetic biomembranes
TL;DR: In this article, the spectral characteristics and absorption coefficients of chlorophylls, pheophytins, and carotenoids were analyzed using a two-beam spectrophotometer.
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The infra-red spectra of complex molecules
TL;DR: In this article, the authors present a survey of research work in physics, physical sciences, and physical chemistry, focusing on physics, chemistry, physics, and biology. But they do not discuss their work in this paper.