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Vysotskaya L, Timergalina L, Akhiyarova G, Korobova A, Fedyaev V, Ivanov I, Kudoyarova G, Veselov D. Association of Barley Root Elongation with ABA-Dependent Transport of Cytokinins from Roots and Shoots under Supra-Optimal Concentrations of Nitrates and Phosphates. Cells 2021; 10:cells10113110. [PMID: 34831337 PMCID: PMC8625479 DOI: 10.3390/cells10113110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 10/27/2021] [Accepted: 11/09/2021] [Indexed: 11/25/2022] Open
Abstract
Changes in root elongation are important for the acquisition of mineral nutrients by plants. Plant hormones, cytokinins, and abscisic acid (ABA) and their interaction are important for the control of root elongation under changes in the availability of ions. However, their role in growth responses to supra-optimal concentrations of nitrates and phosphates has not been sufficiently studied and was addressed in the present research. Effects of supra-optimal concentrations of these ions on root elongation and distribution of cytokinins between roots and shoots were studied in ABA-deficient barley mutant Az34 and its parental variety, Steptoe. Cytokinin concentration in the cells of the growing root tips was analyzed with the help of an immunohistochemical technique. Increased concentrations of nitrates and phosphates led to the accumulation of ABA and cytokinins in the root tips, accompanied by a decline in shoot cytokinin content and inhibition of root elongation in Steptoe. Neither of the effects were detected in Az34, suggesting the importance of the ability of plants to accumulate ABA for the control of these responses. Since cytokinins are known to inhibit root elongation, the effect of supra-optimal concentration of nitrates and phosphates on root growth is likely to be due to the accumulation of cytokinins brought about by ABA-induced inhibition of cytokinin transport from roots to shoots.
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Affiliation(s)
- Lidiya Vysotskaya
- Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre of the Russian Academy of Sciences, Pr. Octyabrya, 69, 450054 Ufa, Russia; (L.V.); (L.T.); (G.A.); (A.K.); (V.F.); (I.I.); (D.V.)
| | - Leylya Timergalina
- Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre of the Russian Academy of Sciences, Pr. Octyabrya, 69, 450054 Ufa, Russia; (L.V.); (L.T.); (G.A.); (A.K.); (V.F.); (I.I.); (D.V.)
| | - Guzel Akhiyarova
- Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre of the Russian Academy of Sciences, Pr. Octyabrya, 69, 450054 Ufa, Russia; (L.V.); (L.T.); (G.A.); (A.K.); (V.F.); (I.I.); (D.V.)
| | - Alla Korobova
- Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre of the Russian Academy of Sciences, Pr. Octyabrya, 69, 450054 Ufa, Russia; (L.V.); (L.T.); (G.A.); (A.K.); (V.F.); (I.I.); (D.V.)
| | - Vadim Fedyaev
- Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre of the Russian Academy of Sciences, Pr. Octyabrya, 69, 450054 Ufa, Russia; (L.V.); (L.T.); (G.A.); (A.K.); (V.F.); (I.I.); (D.V.)
- Department of Biology, Bashkir State University, Zaki-Validi St. 32, 450074 Ufa, Russia
| | - Igor Ivanov
- Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre of the Russian Academy of Sciences, Pr. Octyabrya, 69, 450054 Ufa, Russia; (L.V.); (L.T.); (G.A.); (A.K.); (V.F.); (I.I.); (D.V.)
| | - Guzel Kudoyarova
- Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre of the Russian Academy of Sciences, Pr. Octyabrya, 69, 450054 Ufa, Russia; (L.V.); (L.T.); (G.A.); (A.K.); (V.F.); (I.I.); (D.V.)
- Correspondence:
| | - Dmitry Veselov
- Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre of the Russian Academy of Sciences, Pr. Octyabrya, 69, 450054 Ufa, Russia; (L.V.); (L.T.); (G.A.); (A.K.); (V.F.); (I.I.); (D.V.)
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