Recently, I was doing some studying on chemicals and hormones that may effect plant and mushroom growth and I came across Brassinosteroids. Here is the two references that made me wonder about their use in mushroom growth:Brassinosteroids. G. Adam, V. Marquardt. Phytochem. 25: 1787 (1986)
Growth-promoting effect of a brassinosteroid in mycelial cultures of the fungus Psilocybe cubensis. J. Gartz, G. Adam, H.-M. Vorbrodt. Naturw. 77: 388 (1990)
I haven't had a chance to check these sources out yet, but the second suggests that this might work. Here are some more sources:
TITLE: Brassinosteroids.
AUTHORS: Adam G; Schmidt J; Schneider B
AUTHOR AFFILIATION: Institute of Plant Biochemistry, Halle/S., Germany.
SOURCE: Fortschr Chem Org Naturst 1999;78:1-46
CITATION IDS: PMID: 10592760 UI: 20060345
TITLE: Biological effects of brassinosteroids.
AUTHORS: Brosa C
SOURCE: Crit Rev Biochem Mol Biol 1999;34(5):339-58
CITATION IDS: PMID: 10565679 UI: 20029409
TITLE: Molecular physiology of brassinosteroids revealed by the analysis of mutants.
AUTHORS: Altmann T
AUTHOR AFFILIATION: Max-Planck-Institut fur molekulare Pflanzenphysiologie, Golm, Germany. altmann@mpimp-golm.mpg.de
SOURCE: Planta 1999 Mar;208(1):1-11
CITATION IDS: PMID: 10212999 UI: 99229469
TITLE: Recent advances in brassinosteroid molecular genetics.
AUTHORS: Altmann T
AUTHOR AFFILIATION: Max-Planck-Institut fur molekulare Pflanzenphysiologie, Karl-Liebknecht- Strasse 25, 14476 Golm, Germany. altmann@mpimp-golm.mpg.de
SOURCE: Curr Opin Plant Biol 1998 Oct;1(5):378-83
CITATION IDS: PMID: 10066617 UI: 99167776
ABSTRACT: The importance of brassinosteroids (BRs, a specific class of ecdysone- like plant steroids) as essential endogenous regulators of growth and development is demonstrated through a growing number of well characterised Arabidopsis, pea, and tomato mutants deficient in BR biosynthesis or BR response. Thus, a rapid advancement in understanding the molecular genetics of BR biosynthesis and mode of action can be witnessed, which will be further enhanced through the availability of a set of extremely valuable molecular tools for the analysis of the biological function of BRs.
TITLE: A tale of dwarfs and drugs: brassinosteroids to the rescue.
AUTHORS: Altmann T
AUTHOR AFFILIATION: Max-Planck-Institut fur molekulare Pflanzenphysiologie, Golm, Germany. altmann@mpimp-golm.mpg.de
SOURCE: Trends Genet 1998 Dec;14(12):490-5
CITATION IDS: PMID: 9865154 UI: 99082673
ABSTRACT: Brassinosteroids (BRs), a specific class of low abundance plant steroids, are capable of eliciting strong growth responses and a variety of physiological changes through exogenous application to plants. Recently, BRs gained general acceptance as important regulators (hormones) of plant growth and development through genetic and molecular identification and characterization of genes involved in BR biosynthesis or response in Arabidopsis, pea and tomato. This major advance in the molecular genetics of BR biosynthesis and mode of action disclosed another case of amazing functional conservation of signalling molecules utilized in plants and animals, and provided a set of extremely valuable tools for the functional analysis of BRs.
TITLE: Synthesis and molecular modeling: related approaches to progress in brassinosteroid research.
AUTHORS: Brosa C; Zamora I; Terricabras E; Soca L; Peracaula R; Rodriguez-Santamarta C
AUTHOR AFFILIATION: Institut Quimic de Sarria, CETS, Universitat Ramon Llull, Barcelona, Spain. brosa@iqs.url.es
SOURCE: Lipids 1997 Dec;32(12):1341-7
CITATION IDS: PMID: 9438246 UI: 98101143
ABSTRACT: In the field of brassinosteroids, which are potent plant growth regulators, we have developed a quantitative structure-activity relationship study to develop knowledge from a structural point of view and to find out new requirement definitions. This will help identify other suitable active brassinosteroid derivatives with a good activity/synthetic cost ratio for further application in agriculture. The methodology used to achieve this goal represents a multidisciplinary study involving synthesis, molecular modeling calculations, and bioactivity evaluation. The influence of different molecular properties in the bioactivity of a set of synthetic compounds (i.e., molecular electrostatic potential and the ability to form H bonds) is discussed. The molecular electrostatic potential is expressed in terms of the electrostatic Carbo similarity index (CI) between brassinolide (1) and other brassinosteroids. We have found that the electrostatic charges of the functional groups play an important role in the description of the activity, as evidenced by its good correlation with the CI in most cases. Deviation from this rule could be explained by the H bonding abilities of some of these compounds, which we believe may play an essential role in binding to the natural receptors.
TITLE: Recent developments in the field of plant steroid hormones.
AUTHORS: McMorris TC
AUTHOR AFFILIATION: Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla 92093-0506, USA. tmcmorris@ucsd.edu
SOURCE: Lipids 1997 Dec;32(12):1303-8
CITATION IDS: PMID: 9438241 UI: 98101138
ABSTRACT: Brassinolide and related brassinosteroids are a novel group of steroids which appear to be ubiquitous in plants. There is compelling evidence, particularly from recent genetic studies, that these steroids are essential for normal plant growth and development. Synthesis of brassinosteroids and aspects of their biochemistry are reviewed.
TITLE: Studies on biosynthesis of brassinosteroids.
AUTHORS: Sakurai A; Fujioka S
AUTHOR AFFILIATION: Institute of Physical and Chemical Research (RIKEN), Saitama 351-01, Japan.
SOURCE: Biosci Biotechnol Biochem 1997 May;61(5):757-62
CITATION IDS: PMID: 9178548 UI: 97321846
ABSTRACT: Biosynthesis of steroidal plant hormones, brassinosteroids, was studied using the cell culture system of Catharanthus roseus. Feeding labeled compounds of possible intermediates to the cultured cells, followed by analyzing the metabolites by gas chromatography-mass spectrometry disclosed the pathways from a plant sterol, campesterol, to brassinolide. There are two pathways, named the early C6-oxidation pathway and late C6-oxidation pathway, both of which would be operating in a wide variety of plants. Recent findings of brassinosteroid- deficient mutants of Arabidopsis and the garden pea by several groups, and the possible blocked steps of the mutants in the biosynthetic pathways are also introduced.
TITLE: Brassinosteroids.
AUTHORS: Fujioka S; Sakurai A
AUTHOR AFFILIATION: Institute of Physical and Chemical Research (RIKEN), Saitama, Japan.
SOURCE: Nat Prod Rep 1997 Feb;14(1):1-10
CITATION IDS: PMID: 9121728 UI: 97235569
TITLE: Molecular genetic studies confirm the role of brassinosteroids in plant growth and development.
AUTHORS: Clouse SD
AUTHOR AFFILIATION: Department of Horticultural Science, North Carolina State University, Raleigh 27695-7609, USA. steve_clouse@ncsu.edu
SOURCE: Plant J 1996 Jul;10(1):1-8
CITATION IDS: PMID: 8758975 UI: 96314857
TITLE: Plant hormones: brassinosteroids in the spotlight.
AUTHORS: Clouse SD
AUTHOR AFFILIATION: Department of Horticultural Science, North Carolina State University, Raleigh 27695-7609, USA.
SOURCE: Curr Biol 1996 Jun 1;6(6):658-61
CITATION IDS: PMID: 8793287 UI: 96385429
ABSTRACT: Recent studies on dwarf mutants of the model plant Arabidopsis thallana have provided convincing evidence that brassinosteroids-natural plant products similar to animal steroid hormones-are essential for normal plant growth and development.
TITLE: Synthesis of new brassinosteroids with potential activity as antiecdysteroids.
AUTHORS: Brosa C; Nusimovich S; Peracaula R
AUTHOR AFFILIATION: Department of Organic Chemistry, C.E.T.S. Institut Quimic de Sarria, Universitat Ramon Llull, Barcelona, Spain.
SOURCE: Steroids 1994 Aug;59(8):463-7
CITATION IDS: PMID: 7985206 UI: 95076485
ABSTRACT: The synthesis of four new brassinosteroids with 2 beta,3 beta-diol functionality and A/B cis and A/B trans ring junction is reported. These brassinosteroids could present activity as antiecdysteroids.
TITLE: Synthesis of brassinosteroids and relationship of structure to plant growth-promoting effects.
AUTHORS: Thompson MJ; Meudt WJ; Mandava NB; Dutky SR; Lusby WR; Spaulding DW
SOURCE: Steroids 1982 Jan;39(1):89-105
CITATION IDS: PMID: 7080117 UI: 82200325
ABSTRACT: A number of brassinosteroids with and without hydroxyl groups or an alkyl substituent in their side chain were synthesized. The alkyl substituent at C-24 highly influenced the oxidation of the C-22 double bond with osmium tetroxide and, hence the ratio of the 22 beta,23 beta- and 22 alpha,23 alpha-glycolic isomers obtained. Two different bean bioassays used to compare the plant growth-promoting capabilities of these compounds and of brassinolide and its three side chain 22,23-cis- glycolic isomers showed that brassinolide was the most active. The next most active brassinosteroids were generally those with 22 alpha-OH, 23 alpha-OH orientation and a beta-methyl or alpha-ethyl substituent at C- 24. Similarly, of the synthetic precursor tetrahydroxy ketones of the brassinosteroids, those with 22 alpha-OH, 23 alpha-OH orientation (like brassinolide) and an alkyl group at C-24 were also the most active in both bioassays. The results indicate stringent structural features are required for a steroid to induce brassin activity. The structural requirements are: a trans A/B ring system (5alpha-hydrogen), a 6-ketone or a 7-oxa-6-ketone system in ring B, cis alpha-oriented hydroxyl groups at C-2 and C-3, cis hydroxy groups at C-22 and C-23 as well as a methyl or ethyl substituent at C-24.
IMAGINE: STEROIDS FOR SHROOMS!!!
-PsiliPharm
[This message has been edited by PsiliPharm (edited December 30, 1999).]