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Open AccessBrief Report

Plant Triterpenoid Crosstalk: The Interaction of Brassinosteroids and Phytoecdysteroids in Lepidium sativum

Laboratory of Growth Regulators, Institute of Experimental Botany, Czech Academy of Sciences and Palacky University, CZ-78371 Olomouc, Czech Republic
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Plants 2020, 9(10), 1325; https://doi.org/10.3390/plants9101325
Received: 7 September 2020 / Revised: 3 October 2020 / Accepted: 5 October 2020 / Published: 7 October 2020
(This article belongs to the Special Issue Biosynthesis and Functions of Terpenoids in Plants)
Plant steroid alcohols, plant sterols, are essential components of cell membranes that perform many functions. Their most prominent function is maintaining membrane semipermeability and regulating its fluidity through their specific interaction with phospholipids and membrane proteins. This work is focused on the study of the interaction of two groups of plant sterols, brassinosteroids (BRs) and phytoecdysteroids (PE). Steroid substances belonging to both groups are important signaling molecules essential for plant growth and development, but while the first group has all the known attributes of plant hormones, the second lacks hormonal function in plants. The aim of this preliminary study was to determine at what concentration level and to what extent substances of this type are able to interact with each other, and thus influence the early growth and development of a plant. It was found that exogenously applied PE 20-hydroxyecdysone (20E) significantly reduced the level of endogenous BRs in four-day-old garden cress (Lepidium sativum) seedlings. On the other hand, exogenously applied BRs, 24-epibrassinolide (epiBL), caused the opposite effect. Endogenous 20E was further detected at the picogram level in garden cress seedlings. Thus, this is the first report indicating that this plant species is PE-positive. The level of endogenous 20E in garden cress seedlings can be decreased by exogenous epiBL, but only at a relatively high concentration of 1·10−6 M in a culture medium. The image analysis of garden cress seedlings revealed that the length of shoot is affected neither by exogenous BRs nor PE, whereas the root length varies depending on the type and concentration of steroid applied. View Full-Text
Keywords: triterpenoids; brassinosteroids; phytoecdysteroids; Lepidium sativum; plant growth triterpenoids; brassinosteroids; phytoecdysteroids; Lepidium sativum; plant growth
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MDPI and ACS Style

Tarkowská, D.; Krampolová, E.; Strnad, M. Plant Triterpenoid Crosstalk: The Interaction of Brassinosteroids and Phytoecdysteroids in Lepidium sativum. Plants 2020, 9, 1325. https://doi.org/10.3390/plants9101325

AMA Style

Tarkowská D, Krampolová E, Strnad M. Plant Triterpenoid Crosstalk: The Interaction of Brassinosteroids and Phytoecdysteroids in Lepidium sativum. Plants. 2020; 9(10):1325. https://doi.org/10.3390/plants9101325

Chicago/Turabian Style

Tarkowská, Danuše; Krampolová, Eliška; Strnad, Miroslav. 2020. "Plant Triterpenoid Crosstalk: The Interaction of Brassinosteroids and Phytoecdysteroids in Lepidium sativum" Plants 9, no. 10: 1325. https://doi.org/10.3390/plants9101325

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