Differences in germination response to temperature, salinity, and water potential among Prosopis laevigata populations are guided by the tolerance–exploitation trade-off.

Flora ◽  
2021 ◽  
pp. 151963
Author(s):  
Gonzalo Contreras-Negrete ◽  
Fernando Pineda-García ◽  
Sergio Nicasio-Arzeta ◽  
Erick De la Barrera ◽  
Antonio González-Rodríguez
PLoS ONE ◽  
2016 ◽  
Vol 11 (8) ◽  
pp. e0161185 ◽  
Author(s):  
Hélène Tribouillois ◽  
Carolyne Dürr ◽  
Didier Demilly ◽  
Marie-Hélène Wagner ◽  
Eric Justes

2019 ◽  
Vol 157 ◽  
pp. 211-216 ◽  
Author(s):  
Raoudha Abdellaoui ◽  
Fayçal Boughalleb ◽  
Dhikra Zayoud ◽  
Mohamed Neffati ◽  
Esmaeil Bakhshandeh

2021 ◽  
Vol 281 ◽  
pp. 109987
Author(s):  
Naeimeh Sousaraei ◽  
Benjamin Torabi ◽  
Kambiz Mashaiekhi ◽  
Elias Soltani ◽  
Seyyed Javad Mousavizadeh

2002 ◽  
Vol 12 (3) ◽  
pp. 181-191 ◽  
Author(s):  
Amanda J. Ellery

Changes in embryo dormancy of capeweed [Arctotheca calendula (L.) Levyns.] seeds in response to temperature were investigated to determine the nature of seasonal dormancy cycles. Primary embryo dormancy persisted for 2–3 months after seed collection and was then rapidly relieved when seeds were maintained at temperatures simulating summer soil surface temperatures. Embryo dormancy was also rapidly relieved in seeds maintained at constant temperatures, indicating that a daily temperature fluctuation was not necessary for the relief of embryo dormancy in capeweed. Dormancy relief was maximal at 40°C. Secondary dormancy was induced when seeds were maintained at low temperatures and a water potential of –1.5 MPa, suggesting that the onset of winter may postpone germination until a subsequent autumn. These results indicate that the dormancy cycles observed in capeweed seeds maintained on the soil surface are probably driven by seasonal changes in soil temperature.


2018 ◽  
Vol 69 (3) ◽  
pp. 326 ◽  
Author(s):  
Singarayer Florentine ◽  
Sandra Weller ◽  
Alannah King ◽  
Arunthathy Florentine ◽  
Kim Dowling ◽  
...  

Echium plantagineum is a significant pasture weed in the Mediterranean climatic zone of several countries, including Australia. This invasive weed, introduced as an ornamental into Australia (where it is known as Paterson’s curse), quickly became established and is now a significant weed of agriculture. Although E. plantagineum is a well-established, highly competitive weed that thrives under disturbance and is tolerant of a wide variety of conditions, including varying soil moisture and drought, and some aspects of its ecology remain unknown. This study investigated germination response to temperature and light, pH, soil moisture, salinity, and pre-germination exposure of seed to heat and smoke. Temperature was found to be more influential on germination than light and the species is tolerant to a wide range of pH. However, available moisture may limit germination, as may elevated salinity. Management of this weed requires approaches that minimise soil seedbank input or prevent germination of soil seedbanks.


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