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Brassinosteroid phytohormones - structure, bioactivity and applications. Brassinosteroids are a new class of plant hormones with a polyoxygenated steroid structure showing pronounced plant growth regulatory activity. This review covers their natural occurrence, biological and chromatographic methods for their detection, biosynthesis and metabolism, biological activity, structure-activity relationships and prospective agricultural uses. Key words: brassinolide, brassinosteroids. Since the 's, USDA researchers have found that pollen extracts promote plant growth Mandava, and the first paper was published in reporting that application of hexanic extracts of maize pollen to the first internode of young bean seedlings produced marked elongation of the treated internode Mitchell and Whitehead, , a response also obtained using extracts of immature bean seeds Mitchell et al.

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We'd like to understand how you use our websites in order to improve them. Register your interest. Endogenous phytohormone levels and cell structure of Acer saccharinum embryos were studied during seed development.

The submicroscopic cell structure was similar to the structure of functionally active cells. Free and conjugated indoleacetic acid IAA , abscisic acid ABA , zeatin riboside and dihydrozeatin content and gibberellin-like substances GLS activity were determined during embryo maturation.

This is a preview of subscription content, log in to check access. Bewley, J. Google Scholar. Chin, H. Craig, S. Dathe, W. Finkelstein, R. Hallam, N. Fine structure of the developing embryo. Kefeli, V. Leprince, O. Protsko, R. Miller, A. Batsch cv.

Readhaven during development. Musatenko, L. Polyakova, E. Tomaszewska, E. Wanner, G. Ultrastructural evidence. Download references. Reprints and Permissions. Phytohormones and structure of cells of Acer saccharinum seed embryo. Biol Plant 37, Download citation. Received : 20 July Accepted : 10 May Search SpringerLink Search.

Abstract Endogenous phytohormone levels and cell structure of Acer saccharinum embryos were studied during seed development. References Bewley, J. Author information Affiliations N. Sytnik Authors L. Musatenko View author publications. You can also search for this author in PubMed Google Scholar. View author publications. Rights and permissions Reprints and Permissions. About this article Cite this article Musatenko, L.

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In view of the health context linked to the spread of the coronavirus, the methods of organisation and evaluation of the learning units could be adapted in different situations; these possible new methods have been - or will be - communicated by the teachers to the students. See also the list of assessments for the June session. Teacher s. Different processes of development and morphogenesis are studied.

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We'd like to understand how you use our websites in order to improve them. Register your interest. Endogenous phytohormone levels and cell structure of Acer saccharinum embryos were studied during seed development. The submicroscopic cell structure was similar to the structure of functionally active cells. Free and conjugated indoleacetic acid IAA , abscisic acid ABA , zeatin riboside and dihydrozeatin content and gibberellin-like substances GLS activity were determined during embryo maturation. This is a preview of subscription content, log in to check access.

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