Effects of Selenium on Wheat Seedlings Under Drought Stress

Abstract

The paper reports the effects of selenium (Se) supply on growth and some physiological traits of wheat (Triticum aestivum L. cv Shijiazhuang NO. 8) seedlings exposed to drought stress. The growth and physiological responses of seedlings were different depending on the Se concentration. The higher (3.0 mg Se kg(-1)) and lower amount used (0.5 mg Se kg(-1)) did not significantly affect on biomass accumulation. Treatments with 1.0 and 2.0 mg Se kg(-1) promoted biomass accumulation of wheat seedlings. Treatments at 1.0, 2.0, and 3.0 mg Se kg(-1) significantly increased root activity, proline content, peroxidase (POD), and catalase (CAT) activities, carotenoids (Car) content, chlorophyll content, and reduced malondialdehyde (MDA) content of wheat seedlings. Lower Se treatment did not significantly effect on chlorophyll content and MDA content, although it also increased some antioxidant index (proline and Car content, POD and CAT activities) in wheat seedlings. These results suggest that optimal Se supply is favorable for growth of wheat seedlings during drought condition.

Influence of selenium on growth, lipid peroxidation and antioxidative enzyme activity in melon (Cucumis melo L.) seedlings under salt stress

“…Our result demonstrated that the role of Se could enhance the POD activity. This is in agreement with the findings of Yao et al [12], who found that Se supply significantly increased POD activity under drought stress.…”

“…Lipid peroxidation was estimated by measuring the content of malondialdehyde (MDA) using the thiobarbituric acid (TBA) assays as described by Yao et al [12]. Leaves tissues (0.5 g) were extracted in a solution of 20% (w/v) trichloroacetic acid containing 0.5% (w/v) TBA and 4% (w/v) butylated hydroxytoluene.…”

Effect of drought stress and selenium spraying on photosynthesis and antioxidant activity of spring barley / Učinek sušnega stresa in škropljenja s selenom na fotosintezo in antioksidativno aktivnost jarega ječmena

“…Drought stress reduced growth activity of barley (Tables 1), as is observed by other plants species (Ramesh, 1999;Liu and Stützel, 2004;Degu et al, 2008). Recently, Yao et al (2009) suggested that optimal Se supply is favorable for growth of wheat seedlings during drought condition. In this work, however, selenium spraying could not improve growth parameters under drought conditions.…”

“…A significantly higher actual photochemical efficiency of PSII was obtained in Sesupplemented water-deficit plants, which was possibly due to improvement of plant water management during treatment (Tadina et al, 2007). Selenium supply is favorable for growth of wheat seedlings during drought condition, however, the growth and physiological responses of seedlings were different, depending on the Se concentration (Yao et al, 2009). Simojoki (2003) reported that small Se addition that increased Se contents in lettuce shoots tend to enhance plant growth.…”

“…Moreover, some plant species grown in Se-enriched media have shown enhanced resistance to certain abiotic stresses, e.g. drought (Kuznetsov et al, 2003;Germ et al, 2007;Yao et al, 2009), salinity (Kong et al, 2005;Djanaguiraman et al, 2005;Hawrylak-Nowak, 2009) and heavy metals (Srivastava et al, 2009;Cartes et al, 2010) stresses. Selenium exerts beneficial effects on growth and stress tolerance of plants by enhancing their antioxidative capacity (Kong et al, 2005;Rios et al, 2009).…”