Diversity of Essential Oil‐Secretory Cells and Oil Composition in Flowers and Buds of Magnolia sirindhorniae and Its Biological Activities

Abstract

Magnolia sirindhorniae NOOT. & CHALERMGLIN produces fragrant flowers. The volatile oil secretary cells, quantity and quality as well as antioxidant and antimicrobial activities of the oils extracted from buds and flowers, have been investigated. The distribution of essential oil secretory cell in bud and flower revealed that the density and size of the oil cells were significantly higher in flowers compared to buds. In different floral parts, carpel has a higher oil cell density followed by gynophore and tepal. The histochemical analysis revealed the essential oil is synthesized in oil secretory cells. The volatile oil yield was 0.25 % in the buds and 0.50 % in flowers. GC/FID and GC/MS analysis identified 33 compounds contributing 83.2-83.5 % of the total essential oil composition. Linalool is the main constituent contributing 58.9 % and 51.0 % in the buds and flowers oils, respectively. The essential oil extracted from the flowers showed higher antimicrobial efficacy against Klebsiella pneumoniae and Staphylococcus aureus. Similarly, the essential oil isolated from the flowers depicts higher free radical scavenging, and antioxidant activity compared to buds' oil.

Fractionation of Marigold Waxy Extract Using Supercritical CO2

“…Overall, GC-MS trace highlighted that marigold "concrete" contained very low amounts of lighter compounds (i.e., C 10 , terpenes, and oxygenated terpenes). This observation is coherent with some results of the scientific literature, according to which Calendula officinalis L. contains relatively low quantities of monoterpenes, whereas it is richer in sesquiterpenes [11,26], differently from many other flowers [31][32][33][34][35][36]. Looking at this result, an ideal fractionation should be performed by collecting all terpenic compounds in the second separator (a + b families in Figure 1) and all paraffinic compounds in the first one (c family in Figure 1).…”

The Difference of Volatile Compounds in Female and Male Buds of Herpetospermum pedunculosum Based on HS-SPME-GC-MS and Multivariate Statistical Analysis

“…Buds are the state when flowers are about to bloom; their chemical components have not been lost and polluted by foreign substances, thus the research on chemical components of buds has a more realistic effect. Therefore, there were many studies which took buds as research objects, such as Eugenia caryophyllus (Myrtaceae) [18][19][20], Capparis spinosa (Capparaceae) [21], Magnolia biondii and M. sirindhorniae (Magnoliaceae) [22,23], Populus tomentosa (Salicaceae) [24], and Pyrus pyrifolia (Rosaceae) [25]. In this study, it was found that there was significant difference in the volatile compounds between female and male buds of H. pedunculosum.…”

“…There were few reports on the difference in chemical composition of dioecious plants. For example, the contents of 2-cyclohexenone and methyl benzoate in female buds were significantly higher than those in male buds, and the content of ethyl benzoate in male buds was significantly higher than that in female buds of P. tomentosa [23]. The content of linalool in female flowers was significantly higher than that in male flowers, whereas the content of benzyl alcohol in male flowers was significantly higher than that in female flowers of T. kirilowii [29].…”

The In Vitro, Ex Vivo, and In Vivo Effect of Edible Oils: A Review on Cell Interactions

“…The combination of antioxidant and antibacterial activities of all the essential oil formulations appeared useful for the antimicrobial treatment. Regarding flower oils, the essential oil extracted from magnolia flowers showed higher antimicrobial efficacy against Klebsiella pneumoniae and Staphylococcus aureus [ 62 ].…”