Open AccessPlant development, gas exchanges and pigments of Mesosphaerum suaveolens submitted to osmoconditioning and saline stress
Author(s) -
Francisco Romário Andrade Figueiredo,
Jackson Silva Nóbrega,
Reynaldo Teodoro de Fátima,
Toshik Iarley da Silva,
Rodrigo Garcia da Silva Nascimento,
Maria de Fátima de Queiroz Lopes,
Thiago Jardelino Dias,
Riselane de Lucena Alcântara Bruno
Publication year - 2020
Publication title -
acta botanica croatica
Language(s) - English
Resource type - Journals
eISSN - 1847-8476
pISSN - 0365-0588
DOI - 10.37427/botcro-2021-005
Subject(s) - salinity , irrigation , saline water , randomized block design , biomass (ecology) , chlorophyll , abiotic component , chlorophyll a , environmental science , horticulture , saline , botany , chemistry , agronomy , biology , ecology , endocrinology
Salinity is one of the main plant abiotic stresses which affects the establishment and development crops. Hence, the search for technologies that minimize the damage caused by salinity is essential. The aim of thepresent work was to evaluate the effect of salinity stress and osmotic conditioning of seeds on the biomass, gas exchanges and chlorophyll pigments in Mesosphaerum suaveolens (L.) Kuntze. The statistical design adopted was a randomized block design, combined according to the CentralComposite Design, referring to electrical conductivities of irrigation water and osmotic potentials, with minimum (- α) and maximum (α) values of 0.5 and 10.0 dS m-1 and 0.0 and -1.0 MPa, respectively, totaling ninecombinations. The characteristics of dry biomass, gas exchange and chlorophyll indices were evaluated at 45 days after irrigation with saline water started. The salinity of irrigation water severely affectedthe dry biomass and the gas exchanges of M. suaveolens. Irrigation water of electrical conductivity above 3.2 dS m-1 caused reductions in chlorophyll a, b and total contents in M. suaveolens plants. Seed osmoconditioning did not attenuate the negative effects of saline stresson M. suaveolens plants.