The effects of selenium Se (VI) on the physiological characteristics of red cabbage plants (Brassica oleracea var. capitata L. f. rubra, cv. Erfurtsko rano) and on its ability to absorb and translocate Se (VI) to different organs were studied. The soil in which the plants were grown was fertilized thirty times with 2 µg Se.L-1 Se (VI), or twice with 0.5 mg Se.L-1 Se (VI) during two months experimentation. Se (VI) was taken up from the soil. Its concentrations in treated plants ranged from 20 to 1190 ng Se.g-1 and in controls from 15 to 30 ng Se.g-1, on a dry matter basis. Se (VI) was distributed in the following order: stems ( leaves ( roots. Fertilization of the soil with Se (VI) had an impact on plant photosynthesis but did not affect transpiration rate, electron transport system activity, potential and effective quantum yields of photosystem (PSII) and the amounts of anthocyanins or chlorophyll a and b. No visual symptoms of Se (VI) toxicity appeared on the plants. Se enriched red cabbage could therefore be a suitable source of Se for human consumption.
COBISS.SI-ID: 2371919
For the study cabbage (Brassica oleracea var. capitata L.) and red cabbage (Brassica oleracea var. capitata L. f. rubra) were treated with Na selenate. Cabbage was foliarly sprayed twice with 20 mg Se (VI) L-1, while red cabbage was fertilized twice with 0.5 mg Se (VI) L-1. Despite the high dose of Se no toxic effects were observed on cabbage plants. The total Se concentration in cabbage leaves was 4.80 ± 0.25 µg Se g-1 (DM) and in red cabbage 0.96 ± 0.04 µg Se g-1 (DM). Soluble Se compounds were extracted from parts of cabbage with protease XIV, resulting in 49% of soluble Se from roots, 59% from leaves and 65% from stems. In red cabbage there the corresponding figures were 28% of soluble Se in roots, 31% in stems, and 43% in leaves. Se-species were determined in the enzymatic extracts using ion exchange HPLC-ICP-MS. The main Se species found in all parts of cabbage and red cabbage was SeMet, which in roots represented 94% and 55% of the soluble Se content in cabbage and red cabbage, respectively. In stems and leaves of cabbage SeMet represented only 23% of the soluble Se content. In stems of red cabbage SeMet represented 80% and in leaves 41% of the soluble Se content. We observed that traces of Se (VI) were present in upper parts of both plants.
COBISS.SI-ID: 2492495