Application of brassinosteroids for improving crop production

Efimova, M. V.

doi:10.1016/b978-0-12-813227-2.00001-1

Cited by 1 publication

(2 citation statements)

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“…Of particular interest is their ability to increase plant resistance to damaging abiotic factors of various physical natures, such as drought. The protective effect of exogenous BRs under conditions of water deficit has been convincingly demonstrated in many plant species [10,29]. However, whether the stress-protective effect of steroidal phytohormones depends on their chemical structure remains poorly investigated.…”

Section: Discussionmentioning

confidence: 99%

“…To date, methods for increasing plant resistance to water deficit have been developed using glycine betaine [7], folic acid [6], α-lipoic acid, cysteine [8], and others. It is widely known that the increase in plant resistance is largely determined by factors of hormonal nature [9,10]. In this regard, brassinosteroids (BRs) are of particular interest because they are involved in the regulation of plant growth and ontogenesis and, by acting at extremely low concentrations, exhibit a pronounced stress-protective effect [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Lactone- and Ketone-Brassinosteroids of the 28-Homobrassinolide Series on Barley Plants under Water Deficit

Kolomeichuk,

Murgan,

Danilova

et al. 2024

Plants

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The aim of this work was to study the ability of 28-homobrassinolide (HBL) and 28-homocastasterone (HCS) to increase the resistance of barley (Hordeum vulgare L.) plants to drought and to alter their endogenous brassinosteroid status. Germinated barley seeds were treated with 0.1 nM HBL or HCS solutions for two hours. A water deficit was created by stopping the watering of 7-day-old plants for the next two weeks. Plants responded to drought through growth inhibition, impaired water status, increased lipid peroxidation, differential effects on antioxidant enzymes, intense proline accumulation, altered expression of genes involved in metabolism, and decreased endogenous contents of hormones (28-homobrassinolide, B-ketones, and B-lactones). Pretreatment of plants with HBL reduced the inhibitory effect of drought on fresh and dry biomass accumulation and relative water content, whereas HCS partially reversed the negative effect of drought on fresh biomass accumulation, reduced the intensity of lipid peroxidation, and increased the osmotic potential. Compared with drought stress alone, pretreatment of plants with HCS or HBL followed by drought increased superoxide dismutase activity sevenfold or threefold and catalase activity (by 36%). The short-term action of HBL and HCS in subsequent drought conditions partially restored the endogenous B-ketone and B-lactone contents. Thus, the steroidal phytohormones HBL and HCS increased barley plant resistance to subsequent drought, showing some specificity of action.

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Section: Discussionmentioning

confidence: 99%