Effects of pruning on mineral nutrients and untargeted metabolites in fresh leaves of Camellia sinensis cv. Shuixian

This study was carried out to compare the chemical profile of tea seeds of different sizes determined by GC and ICP/OES devices with chemometric analysis. This study was carried out to determine the effects of different seed size [11.00–12.50 (SD1), 12.51–14.00 (SD2), 14.01–15.50 (SD3), 15.51–17.00 mm (SD4)] on seed internal ratio, crude oil content, fatty acid composition, mineral composition of tea seed by using different chemometric analysis methods (correlation, agglomerative hierarchical clustering, principal component analysis). In the study, fatty acid and mineral compositions were determined in GC and ICP/OES devices, respectively. Crude oil content, palmitic, stearic, oleic, linoleic, eicosenoic acids, SFA, MUFA, PUFA, Al, Fe, Mg elements were found to be significant according to different seed size. Among six different fatty acids determined, oleic acid was major component. Positive correlations were found between oleic acid and MUFA, between linoleic and α-linolenic acid, between linoleic acid and PUFA, between α-linolenic acid and PUFA, between Al and Na, between Ca and Pb, between Ca and Zn, between Co and K, between Cr and Cu, between Mg and Ni, between Mg and P. In PCA analysis, it was determined that the SD1 group was different from the other groups in terms of the stearic, linoleic, α-linolenic, eicosenoic acids, PUFA, B mineral. In AHC analysis, seed sizes were divided into two different groups according to crude oil content, fatty acid and mineral composition, seed internal ratio. Also, different chemometric analysis methods such as correlation, agglomerative hierarchical clustering, principal component analysis were useful and decisive in determining the quality characteristics of tea seeds classified according to seed size.

show abstract

Study on the effect of magnesium on leaf metabolites, growth and quality of tea tree

Zhang,

Wang

et al. 2023

Front. Plant Sci.

View full text Add to dashboard Cite

Magnesium (Mg) is one of the essential elements for the growth of tea trees. In this study, we investigated changes in metabolites, photosynthetic fluorescence parameters and quality indexes of tea leaves under different concentrations of magnesium treatment, and the results showed that there were no significant differences in the quantity and total content of metabolites in tea leaves under different Mg concentrations. The results of volcano map analysis showed that the content of 235 metabolites in tea leaves showed an increasing trend and the content of 243 metabolites showed a decreasing trend with the increase of Mg concentration. The results of the combined analysis of the OPLS-DA model and bubble map showed that 45 characteristic metabolites were screened at different concentrations of Mg. Among these, the content of 24 characteristic metabolites showed an increasing trend and 21 characteristic metabolites showed a decreasing trend with the increase of Mg concentrations. The results of KEEG pathway enrichment showed that 24 characteristic metabolites with a upward trend were significantly enriched in saccharides metabolism, nucleic acid metabolism and vitamin metabolism, while the 21 characteristic metabolites with a downward trend were enriched in the synthesis of plant secondary metabolites, phenylpropanoid biosynthesis, biosynthesis of terpenoids, synthesis and metabolism of alkaloids, and synthesis and metabolism of amino acids. It can be inferred that Mg regulation was beneficial to enhance the photosynthetic capacity of tea trees, improve the accumulation and metabolism of carbohydrate substances in tea trees, and thus promoted the growth of tea trees, but was not conducive to the synthesis of secondary metabolites and amino acids related to tea quality. The results of photosynthetic fluorescence parameters and quality indexes of the tea tree confirmed the conclusion predicted by metabolomics. This study provided a reference for regulating of the growth and quality of tea trees with Mg fertilizer in tea plantations.

show abstract

Effects of pruning on mineral nutrients and untargeted metabolites in fresh leaves of Camellia sinensis cv. Shuixian

Cited by 5 publications

References 46 publications

Tea (Camellia sinensis (L.) O. Kuntze)

Tea (Camellia sinensis (L.) O. Kuntze)

Chemometric assessment of the chemical profile of tea seed (Camellia sinensis) with different size determined by GC and ICP/OES

Study on the effect of magnesium on leaf metabolites, growth and quality of tea tree

Contact Info

Product

Resources

About