Brassinolide, a plant growth-promoting steroid isolated from Brassica napus pollen

@article{Grove1979BrassinolideAP,
  title={Brassinolide, a plant growth-promoting steroid isolated from Brassica napus pollen},
  author={Michael D. Grove and Gayland F. Spencer and William K. Rohwedder and Nagabhushanam Mandava and Joseph F. Worley and J. David Warthen and George L. Steffens and Judith L. Flippen-Anderson and J. Carter Cook},
  journal={Nature},
  year={1979},
  volume={281},
  pages={216-217}
}
Extracts of Brassica napus L. (rape) pollen (family, Cruciferae) have been reported to produce a novel growth-promoting effect when applied to young pinto bean plants1,2. Fractions that are active in the bean second-internode assay3 give rise to both increased cell elongation and cell division4. The validity of these early reports has been questioned because biological activity was not correlated with any one pure compound5. Subsequently, we showed that isolation of the growth promoter was… 
ACCELERATION OF PLANT GROWTH THROUGH SEED TREATMENT WITH BRASSINS
TLDR
Brassins seem to function endogenously in connection with the sexual reproduction of rape plants by influencing seed growth and subsequently enhancing the overall plant growth, thus brassins may enhance the growth potential of plants, particularly those that grow more slowly in a plant population.
CHAPTER 9 – Brassinosteroids
Synthesis of Five Known Brassinosteroid Analogs from Hyodeoxycholic Acid and Their Activities as Plant-Growth Regulators
TLDR
Analysis of the activities shows that the 2α,3α-dihydroxy-7-oxa-6-ketone moiety existing in brassinolide is required for the plant growing activity of these compounds, as it has been proposed by some structure-activity relationship studies.
The Influence of Brassinosteroid, a Growth-promoting Steroidal Lactone, on Development and CO2-fixation Capacity of Intact Wheat and Mustard Seedlings
TLDR
In 1970, Mitchell et al. isolated a lipoidal complex from the pollen of rape, called “Brassins”, which was found to have partly powerful growth-promoting properties.
Pleiotropic influences of brassinosteroids on fruit crops: a review
TLDR
The present review has attempted to highlight the conceptual research and development of BRs with their wide range of physiological functions and economic significance in relation to modern fruit production.
Brassinosteroid action in flowering plants: a Darwinian perspective.
TLDR
'Nothing in brassinosteroid research makes sense except in the light of Darwinian evolution' is concluded and the value of basic science is highlighted, with reference to the genetic engineering of better food crops that may become resistant to a variety of plant diseases.
Isolation and characterization of 24-Epibrassinolide from Brassica juncea L. and its effects on growth, Ni ion uptake, antioxidant defense of Brassica plants and in vitro cytotoxicity
TLDR
It was observed that pre-treatment of isolated 24-Epibrassinolide lowered the Ni ion uptake in plants and improved growth, and the amelioration of Ni toxicity was also observed by the activities of antioxidant enzymes.
Investigations on the Mechanism of the Brassinosteroid
TLDR
Results indicate that BR sensitizes bean hypocotyls to gravistimulation and potentiates the action of a growth factor that induces gravitropic growth.
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References

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Brassins—a New Family of Plant Hormones from Rape Pollen
TLDR
The discovery of new hormones, termed brassins, in rape pollen are reported, which have induced measurable growth control when applied in minute amounts to another plant.
Enhancement of overall plant growth, a new response to brassins.
TLDR
Using the fatty hormones, brassins, the authors increased repeatedly the overall growth of bean and some other kinds of plants in greenhouse conditions during the past 3 yr, which has broad implications for the existence of hormone control factors of a new type.
Photochemical rearrangement of α-hydroxy-ketones to lactones
U.v. irradiation of 3β-acetoxy-5α-hydroxycholestan-6-one (I; R = Ac) and of the 5β-epimer (VI; R = Ac) through Pyrex gives 3β-acetoxy-5α-hydroxy-5,6-secocholestan-6-oic lactone (II; R = Ac) and its
Development of Moving Type IV Solar Radio Bursts and Relation to Expanding Magnetic Bottles from Flare Regions
WIDE-BAND type IV radio bursts are usually associated with solar proton flares. Emission of these bursts generally starts from microwave frequency and later expands into decimetric and metric