Plant Soil Environ., 2024, 70(5):287-295 | DOI: 10.17221/21/2024-PSE

The effect of various factors (light, temperature, salt, and drought) on germination of Bromus sterilis L.Original Paper

Kateřina Hamouzová1, Jaromír Šuk1, Soham Bhattacharya1, Jakub Mikulka1, Veronika Valičková1, Michaela Kolářová1, Josef Soukup1
1 Department of Agroecology and Crop Production, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic

Bromus sterilis L. (barren brome) is one of the most economically important noxious grass weeds in the winter cereal fields of Europe. Its ecological behaviour in this agro-climatic region should be assessed for effective weed control strategies. The present study was conducted to assess the dormancy and germination response of the B. sterilis population from the Czech Republic under thermal, light, and stress conditions. The dormancy loss experiment revealed that seeds exposed to the light regime showed a remarkably lower percentage of germination, and under alternating temperatures of 10/20 °C in dark conditions, rapid loss of primary dormancy was observed. This population was found to germinate across a wide temperature range of 5–35 °C, with the highest germination rate at 25 °C (T50 = 1.14 days in dark, 1.21 days in light) and the germination time increased with decreasing temperatures below 25 °C. Further, due to fitness advantage, herbicide-resistant (R) biotypes were found to be more stress-tolerant than susceptible (S) biotypes under salinity and drought conditions. In the highest stress conditions, the germination of S biotypes was negligible, while R biotypes can germinate under high stress, but germination decreased below 25 °C. The current findings may add value to effective weed control strategies using prediction models based on seed dormancy and germination values under different hydrothermal conditions.

Keywords: drought stress; herbicide resistance; salinity stress; competition

Received: January 10, 2024; Revised: February 19, 2024; Accepted: February 29, 2024; Prepublished online: March 25, 2024; Published: April 22, 2024  Show citation

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Hamouzová K, Šuk J, Bhattacharya S, Mikulka J, Valičková V, Kolářová M, Soukup J. The effect of various factors (light, temperature, salt, and drought) on germination of Bromus sterilis L. Plant Soil Environ. 2024;70(5):287-295. doi: 10.17221/21/2024-PSE.
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