Sensitivity of Seed Germination to Temperature and Light in Helichrysum amorginum

  • Sofia ARGYRIOU Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
  • Panayiota PAPASTYLIANOU Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
  • George STAVROPOULOS Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
  • Angeliki KOUSTA Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
  • Ioanna KAKABOUKI Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
  • Panagiotis KANATAS Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
Keywords: germination percentage, germination time, Helichrysum amorginum, light, temperature.

Abstract

Helichrysum amorginum is a perennial shrub, endemic on the Greek island of Amorgos and used for medicinal, cosmetic and ornamental purposes. Information concerning germination behavior and seedling survival is considered essential for the establishment and cultivation of wild species. The objective of this study was to investigate the effect of temperature and light on germination of Helichrysum amorginum seeds. A set of experiments was conducted under completely randomized design with four replications of 200 seeds at three different suboptimal germination temperatures (15, 20 and 25°C) in light and dark conditions for 10 days. Seed material was collected from two different fields of the island (Aegiali and Katapola). The germination performance was evaluated by final germination percentage and mean germination time. The effect of temperature on seed germination percentage and mean germination time was significant in all cases. The presence of light enhanced germination, especially at the optimum temperature of 20°C. In most cases the mean germination time increased at the lower temperature of 15°C. Seeds from Aegiali exhibited higher germination ability than the seed lot from Katapola. Knowledge of seed germination behaviour is of major importance in order to establish effective protocols for seed propagation in Helichrysum amorginum.

Author Biographies

Sofia ARGYRIOU, Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
Department of Crop Science, Laboratory of Agronomy
Panayiota PAPASTYLIANOU, Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
Department of Crop Science, Laboratory of Agronomy
George STAVROPOULOS, Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
Department of Crop Science, Laboratory of Agronomy
Angeliki KOUSTA, Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
Department of Crop Science, Laboratory of Agronomy
Ioanna KAKABOUKI, Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
Department of Crop Science, Laboratory of Agronomy
Panagiotis KANATAS, Agricultural University of Athens, School of Plant Sciences, 75 Iera Odos St., 118 55 Athens
Department of Crop Science, Laboratory of Agronomy
Published
2020-06-01