Foliar Application of Selenite and Selenate to Potato (Solanumtuberosum): Effect of a Ligand Agent on Selenium Content of Tubers

Abstract

The effect of a foliar spray of selenium on potatoes was investigated for 2 years. Amounts of 0, 50, and 150 g of Se ha(-)(1) were applied both as sodium selenate and as sodium selenite in water, either pure or with the addition of 0.15% of soluble leonardite as a source of humic acids (pH 7). Tuber selenium concentration increased with the application levels, both with sodium selenate and with sodium selenite, when only aqueous solutions were used. When humic acids were added, the tuber selenium level rose more markedly after the application of sodium selenate as compared to the case of the aqueous solutions; however, in the case of sodium selenite, the level showed a large increase only after the application of 50 g of Se ha(-)(1). Kinetics showed that humic acids raised the selenate availability, but no differences were found in the distribution of selenium in the tuber fractions. Foliar application of selenium with humic acids was proven to be a good way to increase the selenium content of potatoes, but the assimilation process of selenium was simpler with selenate than with selenite.

Effect of Selenium on Growth, Physiological Aspects and Productivity of Faba Bean (Vicia faba L.)

“…Boldrin et al (2013) indicated that, soil application of Se gave higher content of P compared with foliar application on rice. Similar results were also reported by Hu et al (2002) on rice and Poggi et al ( 2000) on potato.…”

Efectos Del Enriquecimiento Con Selenio en Spad, Calidad De La Fruta Y Parámetros De Crecimiento De Plantas De Fresa en Un Sistema De Cultivo Sin Suelo

“…Sin embargo, la fortificación agronómica de las plantas cultivadas mediante aplicación foliar con Se es aún poco usada (kÁPOLNA et al, 2009). A pesar de ello, la pulverización foliar de Se(IV) o Se(VI) para aumentar el contenido de Se se ha realizado con éxito en muchos cultivos, como la patata (POGGI et al, 2000), arroz (HU et al, 2002), soja (YANG et al, 2003, col, cebolla, ajo y rábano (SLEJKOVEC y GOESSLER, 2005), trigo y calabaza (SMRKOLJ et al, 2005;SMRKOLJ et al, 2006). No obstante, en el caso de la fresa (Fragaria x ananassa Duch.…”

Selenium – An Important Antioxidant in Crops Biofortification

“…Meat and fish are rich source of selenium, mostly in Se-cys form. On the other hand, vegetable and fruit are lower-grade source of selenium, occurring mostly in more acceptable form -Se-met [11]. Surai [3] presents the following acceptability of Se forms: Semet > SeO4 2-> SeO3 2-.…”

“…Figure 5. Increase of concentration of selenium in potato tubers after foliar application [11] Selenium is not considered essential nutrient of vascular plants although in case of its deficiency the reduction of rice (Oriza sativa L.) and wheat (Triticum eastivum L.) growth, higher sensibility of Perennial Ryegrass (Lolium perenneL.) and lettuce (Lactuca sativa L.) to UV radiation [8] were observed.…”

“…In comparison with Na2SeO3 sodium selenate was more efficient for higher applied doses. The experiment used the method of divided block in field conditions [11]. Demonstrative increase of selenium content in potato tubers where selenium was applied in form of Na2SeO3 foliary using field trial method, is described also by Munshi and Mondy [75].…”