Authors:
Dandara Yasmim Bonfim de Oliveira Silva1
, Sefora Gil Gomes de Farias2
, Graziele Nunes
Lopes dos Santos1
, Daniele Cristina Pereira de Matos1
, Romario Bezerra e Silva |
Abstract:
This research aimed to evaluate the seed germination and the initial growth of Albizia niopoides
Benth. seedlings under different photoperiods. The experimental design was completely
randomized with four replicates, each one containing 25 seeds. The seeds were sown on the sand
substrate; and the experiment was carried out under B.O.D (Biochemical Oxigen Demand)
conditions, regulated at alternating 20-30 'c temperature, under photoperiods of continuous dark,
continuous light, 8, 12, and 16h light. The analyzed variables were germination percentage,
germination speed index (GSI), shoot length and primary root, and shoot dry mass and seedling
root system. There was a significant effect (p<_0.01) for all analyzed variables in response to
photoperiods. A. niopoides seeds germinated both in the light presence and absence; however,
the photoperiod conditions of 12 and 16 h light favor the seedling germination and performance
of the studied species. The highest germination values, GSI, primary root length, and dry mass of
the root system were obtained when the seeds were submitted to the 12h light photoperiod. The
12h light photoperiod favors the seed germination and initial growth of Albizia niopoides
seedlings under the conditions established by this study. |
