The Impact of Growth Years on the Medicinal Material Characteristics and Metabolites of <i>Stellaria dichotoma</i> L. var. <i>lanceolata</i> Bge. Reveals the Optimal Harvest Age.

Conclusions The characteristics of the medicinal materials and drying rate of SDL showed a positive trend with increasing growth years, with the fastest development period occurring 3 years after planting, followed by a gradual decrease.

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For example, the number of inter-root bacteria and total number of microorganisms showed an overall trend of first increasing and then decreasing with the increase in the growth years of Fritillaria taipaiensis , in which the overall trend of potassium-dissolving bacteria decreased and the overall trend of fungi increased [ 38 ].

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Among them, cluster 1 contained 324 metabolites, mainly reflecting substances that were co-expressed at high levels in 4- and 5-year-old SDL and showed a trend of high expression with growth years; there were 239 metabolites in cluster 2, and the high expression of 1-year-old SDL and a tendency of declining expression was demonstrated; cluster 3 contained the highest number of metabolites of 330, which showed the high expression of 3-year-old SDL; and cluster 4 comprised 245 metabolites, primarily representing the high expression of 5-year-old SDL, as well as a high expression of 2-year-old SDL.

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