Physiological and biochemical mechanisms of drought regulating the size and color of heartwood in Dalbergia odorifera.

Drought has been found to affect the size and color of precious heartwood of Dalbergia odorifera, but the mechanism remains unclear. For this purpose, we performed the measurement of heartwood size, color, and flavonoid content and composition in a 15-year-old mixed plantation of D. odorifera and Santalum album that had been subjected to two levels of rainfall exclusion and control treatments for seven years, and carbon isotope labeling and anatomical observation in 2-year-old potted D.

Molecular mechanisms underlying floral fragrance in 'High Fragrance': a time-course assessment.

'High Fragrance' is a camellia hybrid known for its unique and intense floral scent. The current understanding of the dynamic changes in its fragrance and the underlying mechanisms are still limited. This study employed a combination of metabolomic and transcriptomic approaches to reveal the characteristics of the metabolites involved in the remarkable fragrance of this camellia and their biosynthetic mechanisms along three flower developmental stages (flower bud, initial bloom, and full bloom).