Wheat germ agglutinin is involved in the protective action of 24-epibrassinolide on the roots of wheat seedlings under drought conditions

The involvement of wheat germ agglutinin (WGA) in the protective action of 24-epibrassinolide (EBR) against drought stress was studied in the seedling roots of two wheat cultivars differing in drought tolerance. Under dehydration conditions, the contents of ABA and WGA were shown to change significa...

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Bibliographic Details
Published in:Plant physiology and biochemistry 2020-01, Vol.146, p.420-427
Main Authors: Avalbaev, Azamat, Bezrukova, Marina, Allagulova, Chulpan, Lubyanova, Alsu, Kudoyarova, Guzel, Fedorova, Kristina, Maslennikova, Dilara, Yuldashev, Ruslan, Shakirova, Farida
Format: Article
Language:English
Subjects:
ABA
Brassinosteroids
Dehydration
Droughts
Lectin
Mitotic index
Plant Roots
Seedlings
Steroids, Heterocyclic
Triticum
Triticum aestivum L
Wheat Germ Agglutinins
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Summary:The involvement of wheat germ agglutinin (WGA) in the protective action of 24-epibrassinolide (EBR) against drought stress was studied in the seedling roots of two wheat cultivars differing in drought tolerance. Under dehydration conditions, the contents of ABA and WGA were shown to change significantly in the roots of either drought-tolerant cultivar Omskaya 35 or drought-sensitive cultivar Salavat Yulaev. Meanwhile, accumulation of either ABA or WGA started earlier and was two times greater in plants of drought-tolerant cultivar. Since WGA is an excreted protein, it is not surprising that the level of lectin in the roots gradually decreased by the 7th day of treatment due to its exudation into root environment. Pre-sowing treatment with EBR contributed to additional accumulation of lectin as compared to the control variants of either cultivar, while the hormone treatment did not change ABA content. Meanwhile, under conditions of drought, EBR-pretreated seedlings were characterized by lower level of accumulation of ABA and WGA in the roots. EBR application was found to prevent drought-induced inhibition of cell division in the root apical meristem, while WGA excreted into the root environment may contribute significantly to the effect. •Pre-sowing treatment with EBR increases drought tolerance of contrasting wheat cultivars.•EBR pretreatment induces WGA accumulation in roots of both cultivars under normal conditions.•WGA is involved in EBR-induced protection of roots of both cultivars against drought.
ISSN:0981-9428
1873-2690
DOI:10.1016/j.plaphy.2019.11.038