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Article History

Received: 7 December 2017

Accepted: 20 February 2018

First Online: 6 March 2018

Ethics approval and consent to participate

: Seeds of Zea mays B73 were obtained from U.S. National Plant Germplasm System () as material for (non-commercial) academic purposes and as such were used. Z. mays is not on the List of Protected and Endangered species in European countries and no permissions to collect the seeds of these plants were needed (Czech law number: 114/1992 Sb.) Seeds were grown in hydroponics under greenhouse conditions, no field permissions were necessary to collect the plant samples for this study. The authors declared that experimental research works on the plants described in this paper comply with institutional, national and international guidelines.

: Not applicable.

: The authors declare that they have no competing interests.

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