Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.1134/S1021443721050137

Ключевые слова: nasturtium officinale, glycophyte, salt tolerance, photosynthetic apparatus, closed ecosystems

Аннотация: Productivity values, sodium accumulation in aboveground biomass, and photosynthetic indices of watercress (Nasturtium officinale) leaves were investigated under conditions resembling artificial closed ecological systems (CES). The seedlings were grown on nutrient media with various NaCl concentrations (0.7, 1.4, and 1.8 g/L) for 7, 14, and 19 days after transferring them to saline solutions. The productivity of plants on the seventh day of their growth on saline media did not differ from that of control plants. The decrease in plant productivity was noted in all the treatments starting from the 14th day after transferring the plants to saline solutions. When NaCl concentration in the nutrient solution was raised from 0.7 to 1.8 g/L, a significant increase in relative Na+ content in plant tissues was observed, regardless of the duration of NaCl treatment. A substantial decrease in chlorophyll (a + b) to carotenoid content ratio was noted on the seventh and 14th days in plants grown at 1.8 g/L NaCl. In plants treated for 7 days with 0.7 and 1.4 g/L NaCl, the content of chlorophylls a and b and carotenoids was found to increase, which indicates the tolerance of N. officinale to CES conditions. The relative content of chlorophylls a and b in the light-harvesting chlorophyll (a + b) complex was independent of the extent of salinity. The maximum quantum yield of photosystem II reaction in N. officinale plants had typically high values (Y(II)(max) of 0.755 +/- 0.007). Using the Imaging Maxi version of the pulse amplitude-modulated (PAM) fluorometer, it was found that light curves for the effective quantum yield of photochemical and nonphotochemical fluorescence quenching (Y(II) and Y(NPQ), respectively) differed appreciably between the salt-treated and untreated plants in the case of long-term cultivation (19 days) at 0.7 and 1.4 g/L NaCl. The treatment with 1.8 g/L NaCl for the period from 14 to 19 days had no effect on light curves of Y(II) and Y(NPQ). It is argued that N. officinale can be used as a source of NaCl for humans under CES conditions.

Журнал: RUSSIAN JOURNAL OF PLANT PHYSIOLOGY

Выпуск журнала: Vol. 68, Is. 6

Номера страниц: 1173-1185

ISSN журнала: 10214437

Место издания: NEW YORK

Издатель: PLEIADES PUBLISHING INC

• Pavlova A.M. (Siberian Fed Univ, Krasnoyarsk, Russia; Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk, Russia)
• Gaevskii N.A. (Siberian Fed Univ, Krasnoyarsk, Russia)
• Anishchenko O.V. (Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk, Russia)
• Tikhomirova N.A. (Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk, Russia)
• Tikhomirov A.A. (Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk, Russia; Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk, Russia)

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