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

Grove, Michael D.; Spencer, Gayland F.; Rohwedder, W. K.; Mandava, N. Bhushan; Worley, J. F.; Warthen, J. D.; Steffens, G. L.; Flippen‐Anderson, Judith L.; Cook, James C.

doi:10.1038/281216a0

Cited by 953 publications

(457 citation statements)

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“…Since the first discovery of the growth promoting activity in extracts of rape pollen in 1970 [1] and the identification of the bioactive compound brassinolide (BL) in 1979 [2], many plant steroids with similar structure and functions to BL have been identified throughout the plant kingdom, and they are defined as brassinosteroids (BRs). Physiological studies have demonstrated that BR can induce diverse cellular responses such as stem elongation, pollen tube growth, leaf bending and epinasty, root inhibition, induction of ethylene biosynthesis and fruit ripening, and xylem differentiation [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

The brassinosteroid signal transduction pathway

Wang

Chong

et al. 2006

Cell Res

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Steroids function as signaling molecules in both animals and plants. While animal steroid hormones are perceived by nuclear receptor family of transcription factors, brassinosteroids (BR) in plants are perceived by a cell surface receptor kinase, BRI1. Recent studies have demonstrated that BR binding to the extracellular domain of BRI1 induces kinase activation and dimerization with another receptor kinase, BAK1. Activated BRI1 or BAK1 then regulate, possibly indirectly, the activities of BIN2 kinase and/or BSU1 phosphatase, which directly regulate the phosphorylation status and nuclear accumulation of two homologous transcription factors, BZR1 and BES1. BZR1 and BES1 directly bind to promoters of BR responsive genes to regulate their expression. The BR signaling pathway has become a paradigm for both receptor kinase signaling in plants and steroid signaling by cell surface receptors in general.

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Section: Introductionmentioning

confidence: 99%

The brassinosteroid signal transduction pathway

Wang

Chong

et al. 2006

Cell Res

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“…1 ) This steroid promotes cell division, cell elongation and plant growth. 2 , 3) Recently, four research groups succeeded in the total synthesis of brassinolide and its analogues.…”

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Synthesis and Plant Growth-promoting Activity of Brassinolide Analogues

Wada

Marumo

1981

Agricultural and Biological Chemistry

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“…Las primeras investigaciones sobre BRs se iniciaron a partir del aislamiento de la brassinolide (BL), cuando se observó que algunos extractos orgánicos presentes en el polen de Brassica napus promovían la elongación y división celular en los tallos de las plantas (Mitchell et al, 1970;Grove et al, 1979). El hecho de que cierto componente activador de estos extractos resultó ser un esteroide impulsó investigaciones internacionales sobre la química y fisiología de estos potentes reguladores del crecimiento (Rao et al, 2002).…”

Section: Introductionunclassified

“…The first researches on BRs, initiated from the isolation of brassinolide (BL), when it was observed that some organic extracts in the pollen of Brassica napus promoted elongation and cell division in plant stems (Mitchell et al, 1970;Grove et al, 1979). The fact that some activator component of these extracts resulted a steroid, motivating international research on the chemistry and physiology of these potent growth regulators (Rao et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

La elongación de brotes adventicios de frambuesa (Rubus ideaus L.) es influenciada por brasinosteroides

Robres-Torres

López-Medina

Rocha-Granados

2017

Remexca

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ResumenLa técnica de cultivo in vitro fue utilizada para estudiar el efecto de la combinación de benciladenina (BA) y brasinolido (BL), dos reguladores de crecimiento vegetal, en la formación y elongación de brotes adventicios de frambuesa (Rubus idaeus L.). También se evaluó el enraizamiento de los brotes regenerados tanto en condiciones in vitro como ex vitro. Tres selecciones de frambuesa, UMC-702, UMC-706 y UMC-708, generadas de un programa de mejoramiento genético en la Facultad de Agrobiología, fueron seleccionadaspara llevar a cabo esta investigación. En la fase de multiplicación, el medio MS fue suplementado con diferentes combinaciones de bencialadenina (0 y 1.5 mg L -1 ) y brasinolido (0, 0.00001 y 0.00002 µM). La formación de brotes adventicios no fue dependiente de la combinación de los reguladores; sin embargo, la elongación de los mismos fue significativamente influenciada por el genotipo y el uso de brasinolido (BL); los mejores resultados se obtuvieron con la selección UMC-706 expuesta a 0.00002 µM de BL. El enraizamiento de los brotes adventicios fue mejor en condiciones ex vitro que in vitro, con mayor formación y elongación tanto de raíz como de los brotes; ello permitió una mejor aclimatación y adaptación de las plantas, lo que significa un ahorro tanto en tiempo como en costos de labor para la micropropagación de frambuesa. Así, este es el primer reporte del uso de brasinosteroides en frambuesa. AbstractIn vitro culture techniques have been used to study the effect of the combination of benzyladenine (BA) and brassinolide (BL), two plant growth regulators, in the formation and adventitious shoot elongation of raspberry (Rubus idaeus L.). Rooting of regenerated shoots both in vitro and ex vitro conditions were evaluated. Three selections of raspberry, UMC-702 UMC-706 and UMC-708, generated from a breeding program at the Faculty of Agrobiology, were selected to conduct this research. In the multiplication phase, the MS medium was supplemented with different combinations of benzyladenine (0 and 1.5 mg L -1 ) and brassinolide (0, 0.00001 and 0.00002 µM). Adventitious shoot formation was not dependent on the combination of regulators; however, the elongation of it was significantly influenced by genotype and use of brassinolide (BL); the best results were obtained with UMC-706 exposed to 0.00002 µM of BL. Rooting of adventitious shoots were better in ex vitro than in vitro conditions, with higher formation and elongation both root and shoots; allowing a better acclimatization and adaptation of plants, which means savings in time and labor for micro propagation of raspberry. So, this is the first report on the use of brassinosteroids in raspberry.

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

Cited by 953 publications

References 10 publications

The brassinosteroid signal transduction pathway

The brassinosteroid signal transduction pathway

Synthesis and Plant Growth-promoting Activity of Brassinolide Analogues

La elongación de brotes adventicios de frambuesa (Rubus ideaus L.) es influenciada por brasinosteroides

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