Succession of endophytic bacterial community and its contribution to cinnamon oil production during cinnamon shade-drying process.

Cinnamon oil is a blend of secondary metabolites and is widely used as spice. Endophytic bacteria are always related to the secondary metabolites production. However, the potential of endophytic bacteria communities for cinnamon oil production during cinnamon shade-drying process is still not clear. In this study, we investigated the composition and metabolic function of endophytic bacterial community during 80-day shade-drying process. The temporal dynamics of essential oil content and its dominant constituents were analyzed. The succession of endophytic bacterial community from d0 to d80 was identified. The influence of endophytic bacterial community evolution on cinnamon oil is significant positive. Predictive functional analysis indicated that shade-drying process was rich in Saccharopolyspora that produce enzymes for the conversion of phenylalanine to cinnamaldehyde. These findings enhance our understanding of the functional bacterial genera and functional genes involved in the production of cinnamon oil during cinnamon shade-drying process.

1,4a,7-Trimethyl-7-vinyl-1,2,3,4,4a,4b,5,6,7,8,10,10a-dodeca-hydro-phenanthrene-1-carboxylic acid.

The title compound, also known as isopimaric acid, C(20)H(30)O(2), was isolated from slash pine rosin. There are two unique mol-ecules in the unit cell. The two cyclo-hexane rings have classical chair conformations. The cyclo-hexene ring represents a semi-chair. The mol-ecular conformation is stabilized by weak intra-molecular C-H⋯O hydrogen-bonding inter-actions. The mol-ecules are dimerized through their carboxyl groups by O-H⋯O hydrogen bonds, forming R(2) (2)(8) rings.

(E)-(4-Chloro-benzyl-idene){[(1R,4aS,10aR)-7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octa-hydro-1-phenanthryl]-methyl}amine.

The title compound, C(27)H(34)ClN, has been synthesized from 4-chloro-benzaldehyde and dehydro-abietylamine. There are two unique mol-ecules in the unit cell. Each mol-ecule has three chiral centres, which exhibit R, S and R absolute configurations. The two cyclo-hexane rings form a trans ring junction with classical chair and half-chair conformations.

(E)-N'-(2-Hydroxy-benzyl-idene)-3,4,5-trimethoxy-benzohydrazide.

The title compound, C(17)H(18)N(2)O(5), was synthesized from 3,4,5-trimethoxy-benzohydrazide and 2-hydroxy-benzaldehyde. The dihedral angle between the planes of the two benzene rings is 29.9 (2)°. The crystal structure involves intra-molecular O-H⋯N, and inter-molecular N-H⋯O and C-H⋯O hydrogen bonds.

(E)-N'-(5-Bromo-2-hydroxy-benzyl-idene)-3,4,5-trimethoxy-benzohydrazide.

The mol-ecule of the title compound, C(17)H(17)BrN(2)O(5), assumes an E configuration, with the 5-bromo-2-hydroxy-phenyl and benzohydrazide units located on opposite sites of the C=N double bond. The dihedral angle between the planes of the two benzene rings is 32.48 (15)°. The crystal structure is stabilized by intra-molecular O-H⋯N and inter-molecular N-H⋯O hydrogen bonds.

(E)-N'-(4-Chloro-benzyl-idene)-3,4,5-trimethoxy-benzohydrazide.

The title compound, C(17)H(17)ClN(2)O(4), was synthesized from 3,4,5-trimethoxy-benzohydrazide and 4-chloro-benzaldehyde. In the crystal structure, packing is stabilized by intramolecular C-H⋯O and inter-molecular N-H⋯O and C-H⋯O hydrogen-bonding inter-actions.