Photosynthetic activity and chlorophyll pigment concentration in Medicago x varia T. Martyn leaves treated with the Tytanit growth regulator

The purpose of the research was to determine the effect of the foliar use of a growth regulator with the trade name of Tytanit, containing titanium ascorbate, on photosynthetic activity and chlorophyll content in Medicago x varia T. Martyn leaves. There were two kinds of plots: C - control series; Ti - plants treated with Tytanit, containing 8.5 g of titanium in 1 dm3. The following parameters were determined: maximum photosystem II efficiency (F-v/F-m) in a dark-adapted state, actual photosystem II efficiency (Delta F/F-m') in a light-adapted state, photochemical quenching factor (QP), non-photochemical quenching factor (QN), and chlorophyll a and b content. The Fisher-Snedecor test was used to determine whether the impact of experimental factors was significant, and the HSD 0.05 value was calculated using Tukey's test. Compared to control, the photosynthetic apparatus performance of alfalfa was positively affected by the regulator compared to control. Tytanit applied to plant leaves increased their photosynthetic activity as a result of an increase in the content of chlorophyll pigments. It was also found that periods of rainfall deficiency did not affect the beneficial effects of the regulator. (C) 2021 The Author(s). Published by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Automated summary

The research showed that the use of Tytanit, containing titanium ascorbate, positively affected the photosynthetic activity and chlorophyll content of Medicago x varia T. Martyn leaves. Additionally, periods of rainfall deficiency did not diminish the beneficial effects of the growth regulator on the plant leaves.