Affiliation:
1. Universidade Federal do Rio Grande do Norte, Brazil
2. Universidade Federal Rural do Semiárido, Brazil
Abstract
ABSTRACT The use of discontinuous hydration cycles can act in improving seed germination and seedling initial growth under water stress. In this context, the objective of this study was to evaluate the effect of discontinuous hydration on the germination of Mimosa caesalpiniifolia and Pityrocarpa moniliformis seeds under water stress. For this, seeds of these species were subjected to 0 (without hydration), 2 and 4 hydration cycles (18 h) and dehydration (12 and 18 h, respectively), with subsequent germination under water stress simulated for osmotic potentials of 0.0 (distilled water), -0.2, -0.4, -0.6 and -0.8 MPa. Seedlings were evaluated using tests of germination, germination speed index, mean germination time and seedling length. Discontinuous hydration in M. caesalpiniifolia and P. moniliformis seeds hampers germination and vigor of seedlings under water stress up to -0.6 MPa. However, the use of two cycles in P. moniliformis favors germination under more severe water stress (-0.8 MPa).
Subject
General Agricultural and Biological Sciences
Reference20 articles.
1. Testes de vigor para avaliação da qualidade fisiológica de sementes de feijoeiro;AMARO H. T. R.;Revista de Ciências Agrárias,2015
2. BioEstat 5.3: aplicações estatísticas nas áreas das Ciências Biomédicas;AYRES M.,2007
3. Germinação de sementes de Piptadenia moniliformis Benth. sob estresse hídrico;AZERÊDO G. A.;Ciência Florestal,2016
4. Seeds: ecology, biogeography, and evolution of dormancy and germination;BASKIN C. C,2014
5. Seeds: physiology of development, germination and dormancy;BEWLEY J. D.,2013
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献