The effect of inoculation with arbuscular mycorrhizal fungus Rhizophagus irregularis on cytokinin content in a highly mycotrophic Medicago lupulina line under low phosphorus level in the soil

Andrey Yurkov, Svetlana Veselova, Lidia Jacobi, Galina Stepanova, Vladislav Yemelyanov, Guzel Kudoyarova and Maria Shishova
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Andrey Yurkov: All-Russian Research Institute for Agricultural Microbiology, Federal Agency of Scientific Organizations, St. Petersburg, Russia
Svetlana Veselova: Institute of Biochemistry and Genetics of Ufa Scientific Center, Russian Academy of Sciences, Federal Agency of Scientific Organizations, Oktyabrya, Russia
Lidia Jacobi: All-Russian Research Institute for Agricultural Microbiology, Federal Agency of Scientific Organizations, St. Petersburg, Russia
Galina Stepanova: All-Russian Williams Fodder Research Institute, Federal Agency of Scientific Organizations, Lobnya, Russia
Vladislav Yemelyanov: Saint-Petersburg State University, Saint-Petersburg, Russia
Guzel Kudoyarova: Institute of Biology of Ufa Scientific Center, Russian Academy of Sciences, Federal Agency of Scientific Organizations, Ufa, Russia
Maria Shishova: Saint-Petersburg State University, Saint-Petersburg, Russia

Plant, Soil and Environment, 2017, vol. 63, issue 11, 519-524

Abstract: The study is focused on the elucidation of the role of cytokinins (CKs, zeatin and zeatin riboside) in the development of effective arbuscular mycorrhiza (AM) symbiosis with Medicago lupulina. An important mechanism involved in the regulation of host plant growth is supposed to be linked to the modulation of plant hormone balance. The data obtained revealed the formation of an effective AM-symbiosis (M. lupulina + Rhizophagus irregularis) under phosphorus-deficiency. At the shooting stage (35th day after sowing), it is characterized by a decrease in the root:shoot ratio, the lowering in arbuscules and vesicle abundances, but an increase in the intensity of mycelium development. Mycorrhized plants differed from the control ones by higher CK levels in both roots and leaves. Zeatin and zeatin riboside concentration exhibited uneven alterations over time. A role of mycelium in the modulation of CK balance has been discussed.

Keywords: Fabaceae; phytohormone; rhizosphere; macronutrient; arbuscular mycorrhizae (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:63:y:2017:i:11:id:617-2017-pse

DOI: 10.17221/617/2017-PSE

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