Abscisic acid alters carbohydrate accumulation induced by differential response to sodium salts in the halophyte Prosopis strombulifera

IPARRAGUIRRE, J.; PINAMONTI, P.; LLANES, A.; LUNA, V.; BERTAZZA, G.

PLANT BIOSYSTEMS

TAYLOR & FRANCIS LTD

Lugar: Londres; Año: 2019 p. 1 - 11

1126-3504

The role of abscisic acid (ABA) was analyzed in roots and leaves of the halophyte Prosopis strombuliferain response to low osmotic potential (Wo: 1.0, 1.9, and 2.6 MPa) induced by sodium chloride(NaCl), sodium sulfate (Na2SO4), and the iso-osmotic combination of both compounds (NaClþ Na2SO4).P. strombulifera plants were sprayed with ABA, as well as with inhibitors of ABA biosynthesis (sodiumtungstate and fluridone). Different parameters were measured, including total plant height, leaf number, root length, root and shoot biomass, water content, transpiration rate, and total soluble carbohydrates, specific carbohydrates and ABA concentrations. Results showed that sodium salts affectedgrowth parameters in varying ways, depending on the type of salts used as well as the osmotic potentials. ABA-sprayed plants displayed the lowest transpiration values. These plants had a higher contentof total soluble carbohydrates in roots, greater root biomass and length and increased root/shoot rate.This study shows that ABA triggers different biochemical and physiological responses after the perception of a stressful condition, and that the interaction between different concentrations and types ofsalts, and the addition of ABA or its inhibitors generates responses that affect development andgrowth in the halophyte P. strombulifera