Selenium supplementation stimulates vegetative and reproductive growth in canola (Brassica napus L.) plants

Abstract

Selenium (Se) is a beneficial element for higher plants and its positive effect on plants growth and performance has been reported. Effect of Se under non-stress conditions especially during reproductive phase has not been attracted enough attention. In this work effect of Se supplementation at 0, 10 and 20 μg Se plant -1 was studied in canola (Brassica napus'RGS') plants during vegetative and reproductive phase of growth under greenhouse conditions. Selenium addition resulted in a significant enhancement of dry matter production of vegetative parts as well as pod and seed dry weight. In addition, Se supplementation caused a considerable acceleration of reproductive events. In vegetative plants, higher photosynthesis rate, carbohydrates and protein content in the leaves was observed in Se treated plants compared with control. Our results suggested beneficial effect of Se on canola seed yield that may also contribute in improving nutritional value of canola for livestock and human.Key words: flowering, pod dry weight, reproductive phase, seed yield IZVLEČEK DODATEK SELENA POSPEŠUJE RAST IN REPRODUKCIJO PRI RASTLINAH KANOLE (Brassica napus L.)Selen (Se) je za višje rastline koristen element, znani so njegovi ugodni vplivi na rast rastlin. Pri rastlinah, ki rastejo v nestresnih razmerah, zlasti v reproduktivni fazi razvoja, učinki Se še niso bili ustrezno raziskani. V tem delu so avtorji raziskovali dodatek Se (0, 10 in 20 μg Se na rastlino) pri kanoli (Brassica napus L., cv. RGS) tekom vegetativne in reproduktivne faze. Dodatek Se je povzročil značilno povečanje sušine vegetativnih delov, luskov in semen. Dodatek Se je vplival tudi na pospešitev poteka reprodukcije. Pri rastlinah je bila ugotovljena tudi povečana fotosinteza, večja vsebnost ogljikovih hidratov in beljakovin v listih tretiranih rastlin v primerjavi s kontrolo. Rezultati kažejo na ugoden vpliv Se na pridelek kanole, kar lahko vpliva tudi na izboljšano hranilno vrednost te poljščine za živali in ljudi.

THE ROLE OF MAGENTIC IRON AND SODIUM SELENATE IN MINIMIZING SOIL SALT HAZARDS ON GROWTH AND QUALITY OF JACARANDA ACUTIFOLIA HUMB. & BONPL. SEEDLINGS

“…At low level, selenium tended to stimulate the plant growth and root elongation, but at higher one, the dry mass accumulation and root tolerance index were severly decreased. Similar observations were also obtained by Euliss and Carmichael (2004) on canola, Kaklewski et al (2008) on wheat and rape, Lyons et al (2009) on Brassica rapa, Lehotai et al (2011) on Arabidopsis thaliana, Hajiboland and Keivanfar (2012) on canola and Saffaryazdi et al (2012) who noticed that shoot and root length, shoot and root fresh and dry weights and total dry weight of spinach plants were increased in response to the lowest concentration of Se (1 ppm), while higher concentrations (6 and 10 ppm) reduced these parameters. The low concentration enhanced also contents of chlorophylls a and b, while higher levels exert toxic effects.…”

Effect of Se application on photosynthesis, osmolytes and water relations in two durum wheat (Triticum durum L.) genotypes under drought stress

“…We observed previously higher nitrate reductase activity that was accompanied by higher amino acids and protein concentrations in Se-treated wheat (Hajiboland and Sadeghzadeh, 2014) and rapeseed plants (Hajiboland and Keivanfar, 2012). Soluble proteins may be involved in protection of tissues against dehydration damages (Verbruggen and Hermans, 2008) particularly in the leaves that was more affected by Se than the roots.…”

“…However, it did not influence water uptake capacity and biomass of plants under drought (Yao et al, 2009;Habibi, 2013). On the other hand, effect of Se on the improvement of plants growth is not restricted to stressful conditions and its application affects positively plants growth and reproduction under optimum growth conditions (Hajiboland and Amjad, 2007;Hajiboland and Keivanfar, 2012). Recently we reported higher CO 2 and NO 3 -assimilation in Se-supplemented wheat plants grown hydroponically under low or adequate nitrogen supply (Hajiboland and Sadeghzadeh, 2014) that evidenced marked alterations in the N and C metabolism by Se.…”

Protective Effects of Selenium on Wheat Seedlings under Salt Stress

“…Selenium (Se) is considered a beneficial element to plants [4]. Previous studies indicated that Se can delay senescence [5,6] and promote the vegetative and reproductive growth of plants [7]. Studies reported that Se mitigated disadvantageous phenomena caused by various stressful situations, such as heat [8][9][10], cold [11], heavy metals [12,13], ultraviolet (UV)-B [14][15][16][17], drought [18,19], and salt stress [20,21].…”