Cenários de mudanças climáticas influenciando a germinação e vigor de sementes de Mimosa tenuiflora e Cenostigma pyramidalis

Abstract

<span class="fontstyle0">Climatic changes occurring on the planet can cause problems in the physiological behavior of plant seeds from the Caatinga biome. The objective of this research was to evaluate a reference scenario to climate changes in the germination and vigor of Mimosa tenuiflora and Cenostigma pyramidalis seeds. For this, different treatments of environmental stress (combinations of temperature, relative humidity, luminous intensities, and water stresses) were tested on seeds of M. tenuiflora and C. pyramidalis. Using Gerbox boxes with vermiculite substrate, the assays were assembled in CRD, and evaluated for variations related to germination and seed and seedlings vigor. The results obtained were obtained by ANOVA and by the Scott-Knott means test. The germination and vigor of M. tenuiflora seeds and seedlings were reduced after a temperature of 30°C. C. pyramidalis seeds germinated only under conditions of alternating temperature, absence of water stress and cannot tolerate temperatures above 30°C. Climatic changes can affect the germination and vigor of the studied species. Research with this theme must be carried out to improve the management of these species in relation to the effects of climate changes.</span> <br /><br />