This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.
Seed germination response of a noxious agricultural weed Echium plantagineum to temperature and light, pH, drought stress, salinity, heat and smoke
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, quickly became established and is now a significant weed of agriculture. Although E. plantagineum is a well-established, highly competitive weed, which thrives under disturbance and is known to be tolerant of a wide variety of conditions, including varying soil moisture and drought, some aspects of its ecology are still unknown. This current study investigated germination response to temperature and light, pH, soil moisture, salinity, pre-germination exposure of seed to heat and smoke. Temperature was found to be more influential on germination than light and this species is tolerant a wide range of pH. However, available moisture may limit germination, as may elevated salinity. Management of this weed requires approaches that minimize soil seedbank input or prevent germination of soil seedbanks.
CP17308 Accepted 02 December 2017
© CSIRO 2017