1、Brassinolide Induces IAA5, IAA19, and DR5, a Synthetic Auxin Response

Despite numerous physiological studies addressing the interactions between brassinosteroids (BRs) and auxins, little is known about the underlying molecular mechanisms.

2、BRX mediates feedback between brassinosteroid levels and auxin

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...

3、Comprehensive Comparison of Auxin

Although numerous physiological studies have addressed the interactions between brassinosteroids and auxins, little is known about the underlying molecular mechanisms.

4、Brassinolide Induces IAA5, IAA19, and DR5, a Synthetic Auxin

In conclusion, the lack of evidence for auxin-mediated activation of early auxin-inducible genes in response to BL suggests that the BR and auxin signaling pathways independently activate the transcriptional system of the IAA and DR5-GUS genes.

Brassinolide

Brassinolide (Fig. 1) was isolated as a steroidal plant growth regulator from the rape pollen in 1979 [1]. Brassinolide is structurally very unique because it carries a lactone moiety in the B-ring and a pair of vicinal diols in the A-ring and side chain.

Brassinolide, a growth

Brassinolide (BR), a naturally-occurring-steroidal lactone from rape (Brassica napus L.) pollen, was compared with auxin for activity in a number of bioassay systems.

Plant signaling: Interplay of brassinosteroids and auxin in root

The plant hormones brassinosteroids (BRs) and auxin interact to regulate root meristem size.

Brassinosteroids and their Biological Activities

Brassinosteroids are endogenous plant polyhydroxysteroids that are essential for normal plant growth and development. They induce cell elongation and division, increase DNA and RNA polymerase activity, interact synergistically with auxins, stimulate ethylene...

Brassinolide, a growth

Brassinolide (BR), a naturally-occurring-steroidal lactone from rape (Brassica napus L.) pollen, was compared with auxin for activity in a number of bioassay systems.

What’s Brassinolide Details?

The common characteristics of Brassinolide are that it contains Brassinolide, a bioactive substance and steroidal compounds.

Brassinolide is a plant growth regulator with brassinolide lactone as its main component. It is a natural plant hormone primarily found in cruciferous vegetables. Brassinolide lactone plays roles in promoting plant growth, increasing yields, and improving quality, making it widely used in agricultural production.

1. Does Brassinolide Contain Auxins? Yes, brassinolide contains auxins. Auxins are plant hormones that regulate plant growth and development. In plants, auxins are distributed in roots, stems, leaves, and other tissues. They bind to receptors on cell membranes, influencing physiological processes.

2. Why Does Brassinolide Contain Auxins? The presence of auxins in brassinolide can be attributed to the following factors:

• Structural Similarity: The chemical structure of brassinolide resembles auxins, allowing mutual conversion. When auxin levels are low, brassinolide converts into auxins to supplement the plant’s needs. Conversely, excess auxins can be transformed into other substances to reduce dependency.
• Physiological Roles: Brassinolide promotes root development, enhances water/nutrient absorption, stimulates leaf growth, improves photosynthesis, and boosts disease resistance and taste. These effects may correlate with its auxin content.
• Biosynthesis: Some microorganisms produce brassinolide through biosynthesis, using auxins as raw materials. This process may result in residual auxins in microbial-derived brassinolide.

3. Impact of Brassinolide on Plant Growth Brassinolide affects plants in the following ways:

• Promotes Growth: Enhances root development and nutrient uptake, accelerating overall growth.
• Increases Yield: Improves photosynthetic efficiency and organic matter accumulation, boosting crop output.
• Improves Quality: Enhances disease resistance, taste, and market value of agricultural products.

4. Applications of Brassinolide As an efficient and eco-friendly growth regulator, brassinolide is widely used in agriculture:

• Vegetable Production: Used in seedling nurseries, transplantation, and pruning to improve yield and quality (e.g., stronger tomato/pepper seedlings).
• Fruit Tree Production: Applied during pruning, flower thinning, and fruit thinning to reduce pests and enhance fruit quality (e.g., apples, pears).
• Grain Production: Employed in seed treatment and sowing to boost germination and root development (e.g., wheat, corn).

5. Safety of Brassinolide Within prescribed dosages, brassinolide is safe and poses no harm to human health. excessive or long-term use may harm the environment and human health. Its application should comply with regulations to ensure safe usage.