Germination of Macroptilium lathyroides seeds as a function of the presence of salts on the substrate

Abstract

Weeds are species evolutionarily adapted to development in areas of disorders caused by man or not. Adoption of practices to control and integrated weed management, it is essential the knowledge related to germination and environmental factors that interfere with seed germination processes. In this context, the present work aimed to evaluate the behavior of Macroptilium lathyroides seeds in response to different levels of osmotic potential induced NaCl and CaCl2 solutions. The experiment has been organized in a completely randomized design in a factorial 2 x 6, consisting of two salts in concentrations 6 with 4 repetitions. The seeds were kept in on moistened gerboxes germibox roles with NaCl and CaCl2 solutions at the potentials of 0.0; - 0.2; - 0.4; -0.6; -0.8 and -1.0 MPa. Daily reviews by germination, IVG and end ten days were determined shoot length, root length and plantlet dry weight were performed. The results demonstrated that salt stress induced by NaCl and CaCl2 provokes a gradual reduction in germination of M. lathyroides there is no tolerance limit. The NaCl The salt was more critical root development and of the seedlings dry weight.