1、24

24-Epibrassinolide (EBL) is an important brassinosteroid, plays very important role in plant metabolism. EBL improves plant growth and yield by improving morphological growth of plants under salt stress. EBL improves photosynthesis by protecting chloroplast ultra-structure and by improving chlorophyll contents under salt stress.

2、Effects of exogenous 24

Exogenous 24-epibrassinolide (BL) and brassinazole (BRZ) have regulatory roles in G-fiber cell wall development and secondary xylem cell wall carbohydrate biosynthesis during tension wood formation in hybrid poplar. Brassinosteroids (BRs) play important roles in regulating gravitropism and vasculature development.

3、Brassinosteroids: synthesis and biological activities

Brassinosteroids (BRs) are a relatively recently discovered group of phytohormones that are essential for normal plant growth and development. They participate in regulation of numerous vital physiological processes in plants, such as elongation, germination, photomorphogenesis, immunity and reproductive organ development.

4、Q&A: what are brassinosteroids and how do they act in plants?

Brassinosteroids (BRs) are a class of polyhydroxylated steroidal phytohormones in plants with similar structures to animals’ steroid hormones. Brassinosteroids regulate a wide range of physiological processes including plant growth, development and immunity.

5、Full article: Endogenous brassinosteroids in microalgae exposed to salt and low temperature stress

Brassinolide (BL) and its direct biosynthetic precursor castasterone (CS) and 24- epi brassinolide show the highest biological activity (Bartwell et al., 2013).

BRX mediates feedback between brassinosteroid levels and auxin signalling in root growth

BRX expression is strongly induced by auxin and mildly repressed by brassinolide, which means that BRX acts at the nexus of a feedback loop that maintains threshold brassinosteroid levels to...

Comparative effect of 28

BRs enhance PSII activity, stomatal movement, leaf gas exchange parameters and sugar content. BRs reduce hydrogen peroxide and superoxide content by enhancing the antioxidant enzyme activity. BRs improve elemental status and also enhance root cell viability. Effects of EBL exceeds over those of HBL.

Brassinolide and [26, 28

In addition, 24-methylcholesterol (campesterol known to be a precursor sterol of brassinolide plus 24-epicampesterol) was found to be the most abundant 4-demethylsterol in Marchantia cells, and our recent unpublished data indicated that naturally-grown Marchantia contained castasterone.

Exogenously applied 24

24- epi Brassinolide (BL) was exogenously applied to the vascular cambium in the vertical stem of two-year-old yellow poplar. Chemical and anatomical characterization indicates that BL have regulatory roles in the formation of secondary xylem in woody species.

Structural insight into brassinosteroid perception by BRI1

Brassinolide recognition by BRI1 (LRR) is through an induced-fit mechanism involving stabilization of two interdomain loops that creates a pronounced non-polar surface groove for the...

Brassinolide is a plant hormone primarily found in seeds and leaves of plants such as rapeseed and peanuts. It plays a critical regulatory role in plant growth and development, promoting growth, and enhancing stress resistance and adaptability. Brassinolide 14 and 24 are two products with different concentrations of brassinolide, widely used in agricultural production.

1. Composition and Properties

The main difference between Brassinolide 14 and 24 lies in their chemical composition and properties. Brassinolide 14 is a low-concentration product with lower active ingredient content but better stability, making it less prone to degradation. In contrast, Brassinolide 24 is a high-concentration product with higher active ingredient content but poorer stability, leading to easier decomposition.

2. Application Ranges

Brassinolide 14 and 24 differ in agricultural applications. Brassinolide 14 is primarily used during crop seedling nurseries and early growth stages, improving seedling growth rates, stress resistance, and overall health. Brassinolide 24, is applied during flowering and fruit ripening stages to promote normal flowering, pollination, and to enhance fruit yield and quality.

3. Usage Methods

The usage methods for Brassinolide 14 and 24 also vary. Brassinolide 14 is typically formulated as an aqueous solution and can be sprayed directly onto leaves or mixed with other pesticides. Brassinolide 24, meanwhile, is often available as emulsifiable oil or wettable powder, requiring dilution before spraying. Caution must be taken with Brassinolide 24 to avoid overapplication, which may cause phytotoxicity.

4. Effectiveness Comparison

The effects of Brassinolide 14 and 24 differ significantly. Brassinolide 14 acts slowly by promoting growth and stress resistance, requiring longer periods to become apparent. In contrast, Brassinolide 24 has faster-acting effects, particularly during flowering and pollination, with noticeable results achieved in shorter timeframes.

5. Safety

Safety profiles also differ between the two. Brassinolide 14, being a low-concentration product, has minimal impact on humans and the environment, making it safer to use. Brassinolide 24, due to its high concentration, poses greater risks to human health and ecosystems, necessitating strict adherence to safety protocols.

6. Cost

The cost of Brassinolide 14 and 24 varies. Brassinolide 14, with lower active ingredient content and production costs, is priced more affordably. Conversely, Brassinolide 24, due to higher concentration and manufacturing complexity, comes at a higher price.

Brassinolide 14 and 24 differ in chemical composition, properties, application ranges, usage methods, effectiveness, safety, and cost. When selecting between these products, factors such as crop growth stage, pest/disease conditions, and treatment goals should be considered to achieve optimal results. Additionally, careful adherence to dosage and timing guidelines is critical to avoid phytotoxicity.