Seed germination of Bidens subalternans DC. exposed to different environmental factors
| Autor: | Hélida Campos de Mesquita, Hamurábi Anizio Lins, Daniel Valadão Silva, Matheus de Freitas Souza, Juliana de Paiva Pamplona, Claudia Daianny Melo Freitas, Salvador Barros Torres, Danielle Marie Macedo Sousa |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Light Plant Science Plant Reproduction medicine.disease_cause 01 natural sciences Geographical locations Plant Resistance to Abiotic Stress Seed Germination Bidens photoperiodism Multidisciplinary Ecology Plant Anatomy Physics Electromagnetic Radiation Bidens subalternans Eukaryota food and beverages Agriculture 04 agricultural and veterinary sciences Plants Separation Processes Horticulture Artificial Light Germination Plant Physiology Seeds Physical Sciences Darkness Medicine Brazil Research Article Photoperiod Science Crops Environment Biology Research and Analysis Methods Stress Physiological Plant-Environment Interactions Infestation medicine Plant Defenses Distillation Plant Ecology Ecology and Environmental Sciences Organisms Water Biology and Life Sciences Sowing Plant Pathology South America Least significant difference 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Salts Weeds People and places Weed Crop Science 010606 plant biology & botany |
| Zdroj: | PLoS ONE, Vol 15, Iss 5, p e0233228 (2020) PLoS ONE |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0233228 |
| Popis: | Bidens subalternans DC. is a weed found in several tropical countries such as Brazil. Large number of produced seeds and easy dispersion favor the colonization of agricultural fields by this species. To know the factors that affect the germination of B. subalternans can help to understand its ecology, permitting to develop control strategies. Laboratory experiments were carried out to evaluate how the temperature, photoperiod, burial depth, water deficit, and salt stress affect the seed germination of B. subalternans. The means of the treatments of each experiment were shown in scatter plots with the bars indicating the least significant difference (LSD, p≤0.05). The results showed a germination percentage above 77% for a wide alternating temperature (15/20 C to 30/35 C night/day). The highest germination and uniformity occurred at 25/30°C night/day. Only 11% of the seeds germinated at a temperature of 35/40°C night/day. The deeper burial of seeds reduced their germination. Only 17% of the seeds germinated in darkness conditions. However, in constant light and 12 hours of light/dark conditions the germination percentage was over 96%, confirming the light dependence of the B. subalternans during germination. In constant light and 12 hours of light/dark, the germination was over 96%. B. subalternans seeds showed sensitivity to water and salt stress, and their germination was inhibited under a water potential of -0.4 MPa and 100.09 mM, respectively. The sensitivity of B. subalternans seeds to high temperatures, water stress, and salt stress explains the high frequency of this weed in south-central Brazil. The light and sowing depth showed that burial of seeds by mechanical control is a strategy to reduce the high infestation of B. subalternans. |
| Databáze: | OpenAIRE |
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