Brassinolide appears to be the most common Brassinosteroid.

Brassinosteroids (BAs), or Brassins, are a group of plant hormones. These steroid compounds were first discoved in rapeseed plant (Brassica napus) pollen. Image File history File links Brassinolide. ... Image File history File links Brassinolide. ... Plant hormones (or plant growth regulators, or PGRs) are internally secreted chemicals in plants that are used for regulating their growth. ... Binomial name Brassica napus L. Rapeseed Brassica napus, also known as Rape, Oilseed Rape, Rapa, Rapaseed and (one particular cultivar) Canola, is a bright yellow flowering member of the family Brassicaceae. ...

Location, Characteristics and Occasions for Synthesis Induction

• Released in mature cells (and less so in immature cells) when they have less than enough sugar and oxygen to support both themselves and any dependent cells
• Released in response to root environmental, pest, or disease stress

• May work in concert with Gibberellin or be part of the hormone effect cascade
• Is visually similar to the animal hormone cortisol and may function in a similar manner, raising phloem sugar levels to deal with short term environmental stress just like cortisone.

Magnification of typical sugar In non-scientific use, the term sugar means sucrose, also called table sugar or saccharose, a white crystalline solid disaccharide. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless (gas) very pale blue (liquid) Atomic mass 15. ...

Effects

• It can inhibits leaf abscission, the metabolism of cells in the root and root growth;
• It enhances the rate of stem elongation.
• It possibly enhances the production of ethylene indirectly by the causation of root cell senescence while it increases auxin response
• Xylem differentiation can be promoted by these compounds in order to transfer resources from cannibalized root cells. Stressed Shoot is resistant to the stress because of rerouting resources from the root to the shoots..
• It involves in gravitropism and bending of grass leaves at the sheath or blade joints.
• It can acts as an indicator of poor shoot efficiency and low sugar and gases.
• Thus all its effects, such as inhibiting root growth, possibly inhibiting root metabolism, possibly releasing stored sugars and gases and promoting shoot growth may be an attempt to increase sugar and essential gases.
• For example at night when little light is available to make sugar, there may be high levels of BA.
• BRs regulate the expression of numerous genes, impact the activity of complex metabolic pathways, contribute to the regulation of cell division and differentiation, and help control overall developmental programs leading to morphogenesis.
• They are also involved in regulating processes more specific to plant growth including photomorphogenesis and skotomorphogenesis
• They promote cell expansion in the presence of a potentially growth-limiting cell wall.

ROOT is an object-oriented software package developed by CERN. It was originally designed for particle physics data analysis and contains several features specific to this field, but it is also commonly used in other applications such as astronomy and data mining. ... A stem is the above ground axis of a vascular plant. ... Ethylene (or IUPAC name ethene) is the chemical compound with the formula CH2CH2. ... geotropism is a turning or growth movement by a plant or fungi in response to gravity. ...

Reference

• Plant Hormones: Table of Characteristics