Seed Priming with Salicylic Acid Minimizes Oxidative Effects of Aluminum on Trifolium Seedlings
- PDF / 606,371 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 105 Downloads / 193 Views
ORIGINAL PAPER
Seed Priming with Salicylic Acid Minimizes Oxidative Effects of Aluminum on Trifolium Seedlings Gabriel Streck Bortolin 1 & Sheila Bigolin Teixeira 1 & Romário de Mesquita Pinheiro 1 & Gabriele Espinel Ávila 2 & Filipe Selau Carlos 3 & Carlos Eduardo da Silva Pedroso 1 & Sidnei Deuner 2 Received: 7 February 2020 / Accepted: 30 July 2020 # Sociedad Chilena de la Ciencia del Suelo 2020
Abstract Aluminum (Al) toxicity is one of the main aspects restricting the development of fabaceous plants grown in soils with spontaneous vegetation prevalence in temperate climate zones. Salicylic acid (SA) minimizes the effects of stress on plants. Therefore, the aim of the current study was to evaluate the ability of SA seed priming to mitigate the effects of Al on seed germination and seedling performance in two Trifolium species. Trifolium vesiculosum (annual) and Trifolium repens (perennial) seeds were primed in solution added, or not, with SA (25 μM) and placed on germination paper moistened with aluminum sulfate (Al2(SO4)3) solutions at three different doses: 0 mM (control), 0.25 mM (moderate dose), and 1.25 mM (high dose). Seed priming with SA has mitigated the global toxicity effects of Al on T. vesiculosum and T. repens seedlings. Inferior damages were observed in T. vesiculosum root length and dry mass and in T. repens shoot dry mass, after SA pretreatment. T. vesiculosum seed priming with SA in the presence of Al has significantly reduced the osmotic potential of seedling sap. Salicylic acid (SA) has also enabled increased antioxidant activity of enzymes such as superoxide dismutase (SOD) in the two investigated plant species and ascorbate peroxidase (APX) in T. repens. In addition to the increased antioxidant activity, SA-primed seeds reduced the malondialdehyde content in T. vesiculosum seedlings exposed to Al. Overall, seed priming with SA mitigates oxidative effects of Al and improves T. vesiculosum and T. repens seedling performance in the presence of this element. Keywords Hibernal legumes . Al toxicity . Priming agent . Osmotic potential . Antioxidant activity
1 Introduction Vast areas of natural pasture in the Southern Cone of Latin America are the source of important environmental benefits to this region. Summer species prevail in these sites; therefore, the introduction of winter forage species through overseeding can increase forage production, and this process contributes to ecosystem sustainability, mainly to economic sustainability (Elejalde
* Gabriel Streck Bortolin [email protected] 1
Seed Testing Laboratory, Department of Plant Sciences, Faculty of Agronomy “Eliseu Maciel” (FAEM), Federal University of Pelotas, Eliseu Maciel Avenue, Capão do Leão, RS 96160-000, Brazil
2
Laboratory of Plant Nutrition, Department of Botany, Institute of Biology, Federal University of Pelotas, Capão do Leão, RS, Brazil
3
Department of Soil Science, Federal University of Pelotas, Capão do Leão, RS, Brazil
et al. 2012). Genus Trifolium is an important option to improve forage quality and adap
Data Loading...
