Recovery and germinative response of Amaranthus deflexus L. seeds under different levels of water stress and luminosities

• DOI: 10.14295/cs.v9i4.1804
• Publication Date: 2019-05-23T14:01:52Z
• Authors: Larissa De Olivei...; Alexandre Bosco d...; Eneas Gomes Filho; Maria de Fátima D...; José Hamilton da ...; Ítalo Nunes Silva
• Keywords: Distilled water; Petri dish; Water Stress

The objective of this work was to evaluate, in two experiments, the effect water stress and luminosity on germinative behavior vigor Amaranthus deflexus L seeds. seeds were sown Petri dishes containing sheets filter paper moistened with distilled water, control treatment. Using treatment-control configuration, as a standard comparison, assays performed using subsamples from same A. seed population. In first experiment (experiment 1), solutions polyethylene glycol 6000 (PEG 6000) used, providing osmotic potentials -0.3; -0.6; -0.9; -1.2 -1.5 MPa; however, second trial 2) -0.1; -0.2; -0.4 -0.5 MPa used. At end test, ungerminated for each treatment washed germinated water. germination evaluated through count, speed index average time. experimental design completely randomized, 2 x 6 factorial scheme, totaling twelve treatments, four replicates 50 each, both trials. Water negatively affects performance seeds, reducing -0.1 MPa. Seed compromised by absence light, regardless applied levels. There an increase after application at higher levels stress.