Germinative response of Vellozia cinerascens (Velloziaceae) to different temperature and luminosity conditions

Authors

  • Leovandes Soares da Silva Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
  • Thaí­s Ribeiro Costa Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
  • Cristiane Coelho de Moura Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
  • Luana Martins dos Santos Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)
  • Evandro Luiz Mendonça Machado Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)

DOI:

https://doi.org/10.17648/heringeriana.v13i2.917891

Keywords:

Espí?©cie nativa, fotoperí?­odo, sementes florestais

Abstract

In view of the constant degradation of ecosystems in the semi-arid region and the naturally restricted distribution of some species, studies aimed at the conservation of the germplasm bank are essential for maintaining biodiversity. The objective of this study was to evaluate the germination of Vellozia cinerascens seeds, at different temperature levels, in the presence and absence of luminosity. Two experiments were carried out: (1) at different temperatures (20, 30, 40 and 50í°C); (2) at alternating temperatures (30-15 and 40-20í°C), both with two types of luminosity and four repetitions of 25 seeds per treatment. Twelve-hour photoperiod was used to represent day and night in both experiments. The germination count was performed during 30 days. The parameters evaluated were percentage, speed index and mean germination time. At temperatures of 20 and 50í°C the percentage of germination was lower, both for light and dark conditions. The temperatures 30 and 40í°C in the presence of light and alternating 30-15í°C were the ones that obtained the highest percentage of germination, speed and shortest germination time. Temperatures 30 and 40í°C in the presence of light and alternating 30-15í°C were those with the highest germination percentages, speed and shortest germination time.

Author Biographies

Leovandes Soares da Silva, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)

Mestre em Ciência Floresta,  Doutorando do Programa de Pós-Graduação em Ciência Florestal da  Universidade Federal dos Vales do Jequitinhonha e Mucuri

Thaí­s Ribeiro Costa, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)

Mestre em Ciência Floresta,  Doutoranda do Programa de Pós-Graduação em Ciência Florestal da  Universidade Federal dos Vales do Jequitinhonha e Mucuri

Cristiane Coelho de Moura, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)

Mestre em Ciência Floresta,  Doutoranda do Programa de Pós-Graduação em Ciência Florestal da  Universidade Federal dos Vales do Jequitinhonha e Mucuri

Luana Martins dos Santos, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)

Mestre em Ciência Floresta,   Programa de Pós-Graduação em Ciência Florestal da  Universidade Federal dos Vales do Jequitinhonha e Mucuri

Evandro Luiz Mendonça Machado, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)

Professor Adjunto - Departamento de Engenharia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG, Brasil.

Published

2019-12-30

How to Cite

Silva, L. S. da, Costa, T. R., de Moura, C. C., Santos, L. M. dos, & Machado, E. L. M. (2019). Germinative response of Vellozia cinerascens (Velloziaceae) to different temperature and luminosity conditions. Heringeriana, 13(2), 40–51. https://doi.org/10.17648/heringeriana.v13i2.917891

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Original Articles

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