Subjects: Biology >> Botany >> Applied botany submitted time 2023-07-26 Cooperative journals: 《广西植物》
Abstract： Camellia perpetua is the only rare and endangered plant in the genus Camellia that blooms almost all year round. It provides reference for people to know the flower bud differentiation process and the changes of endogenous hormones in leaves at different flower development period and annual growth cycles, as well as clarify the continuous flowering mechanism of this species. In this study, the process of C. perpetua bud differentiation was observed by paraffin sections. The contents of abscisic acid (ABA), indole-3-acetic acid (IAA), gibberellin (GA3) and zeatin nucleoside (ZR) in leaves at different flower development period and in leaves with flower bud and leaves without flower bud in annual growth cycle were determined by enzyme-linked immunosorbent assay (ELISA). The results were as follows: (1) The flower bud differentiation sequence of C. perpetua was from the outside to the inside, and it was divided into 6 period, which lasted 35 days in total, from the bud differentiation to flowering about 2 months. (2) The contents of ABA and GA3 and the ratios of GA3/ABA and (IAA + GA3) /ZR were higher in flower bud morphological differentiation period, while the content of IAA and ZR and the ratios of IAA/ABA and ZR/ABA were lower. (3)The contents of ABA, IAA and ZR in the leaves with flower bud were higher than those in the leaves without flower bud. The IAA/ZR and (IAA + GA3) /ZR ratios were lower than those of the leaves without flower bud. In conclusion, the flower bud differentiation to flowering time of C. perpetua is shorter. High levels of ABA and GA3 and low levels of IAA and ZR are beneficial to flower bud differentiation. Higher levels of ABA, IAA and ZR are beneficial to flower bud development.
Subjects: Biology >> Botany >> Applied botany submitted time 2021-04-29 Cooperative journals: 《广西植物》
Abstract： Ardisia gigantifolia Stapf. is a common Chinese medicinal material in Southwest China, which is widely used in food stewing and medicinal bath. In recent years, the leaves of A. gigantifolia have been developed to make tea, which has effectively broadened the way of application. In order to clarify the nutritional value of A. gigantifolia leaves, we used the national standard method to analyze and evaluate the mineral elements, general nutrients, amino acids and active components of its leaves in different cultivation years, so as to provide scientific basis for its development and utilization. The results were as follows: (1) The leaves of A. gigantifolia contained rich mineral nutrition, which has the characteristics of high potassium and low sodium food. The contents of P, K, Cu, Fe, Mn and Zn in leaves of 1-year-old plants were significantly higher than those of 2-4-year-old plants (P < 0.05). (2) The contents of general nutrients and amino acids of A. gigantifolia leaves were higher. The contents of vitamin C, total sugar and amino acid in leaves of 4-year-old plants were significantly higher than those of 1～3 years old plants (P < 0.05). (3) The leaves of A. gigantifolia were rich in phenols and saponins, but the content of flavonoids was low. The content of total saponins in 1-year-old and total phenolsin 4-year-old were significantly higher than that in other cultivated years (P < 0.05). The mineral nutrition and saponins were the most abundant in 1-year-old, and general nutrition, amino acids andphenols were the most abundant in 4-year-old of A. gigantifolia plants. Compared with common fruits, vegetables and tea, leaves of A. gigantifolia have higher nutritional value and better development and utilization prospects.
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