Effect of Osmotic Stress on the Initial Development of Bean Seedlings

Abstract

One of the methods to determine the tolerance of plants to water stress is the observation of germination of seeds under stress induced in laboratory conditions. Thus, the aim was to evaluate the response of four common bean cultivars to water deficit simulated under laboratory conditions. Two common landrace genotypes acquired from farmers (FORT 07 and FORT 08) and two commercial cultivars, IAPAR 81 and Serrano were evaluated. The different levels of water deficit were induced with mannitol solution. The experimental design was completely randomized and a factorial scheme 5 × 4 (osmotic potential x genotypes), with four replications. The characteristics: primary root protrusion, seed vigor, normal and abnormal seedling, seedling and root length, fresh and dry weight of seedling and root were evaluated. By reducing the osmotic potential seedling vigor bean was more affected than the primary root protrusion. Regardless of cultivar, there was a significant and progressive reduction in the normal seedlings percentage from potential −0.3 MPa. The IAPAR 81 and FORT 07 cultivars showed higher tolerance to water deficit compared to other cultivars.

Identification and characterization of two faba bean (Vicia faba L.) WRKY transcription factors and their expression analysis during salt and drought stress

“…2015). The effects of osmotic pressure on molecular responses have been studied in a number of plant species such as Lotus japonicus (Liu et al 2015), Hordeum vulgare (Habte et al 2014) and P. vulgaris (Cabrall et al 2014). To date, osmotic adjustment in response to water deficit and the effect of osmotic stress on growth and development of faba bean plants has been less well studied (Siddiqui et al 2015).…”

“…2014) and P. vulgaris (Cabrall et al . 2014). To date, osmotic adjustment in response to water deficit and the effect of osmotic stress on growth and development of faba bean plants has been less well studied (Siddiqui et al .…”