Author
MURDOCK, ALISTAIR - University Of Reading | |
DOGAN, ISIK - University Of Reading | |
NICHOLLS, ROY - University Of Reading | |
GONZALEZ ANDUJAR, JOSE - Consejo Superior De Investigaciones Cientificas (CSIC) | |
BENOIT, DIANE - Agriculture And Agri-Food Canada | |
Davis, Adam | |
Forcella, Frank | |
GRAZIANI, FEDERICA - University Of Perugia | |
GRUNDY, ANDREA - National Farmers Union (NFU) | |
KARLSSON, LAILA - Linkoping University | |
MILBERG, PER - Swedish University Of Agricultural Sciences | |
NEVE, PAUL - University Of Warwick | |
RASMUSSEN, ILSE - University Of Aarhus | |
SALONNEN, JUKKA - Mtt Agrifood Research Finland | |
SERA, BOZENA - Academy Of Sciences Of The Czech Republic (ASCR) | |
SOUSA, EDITE - Technical University Of Lisbon | |
TEI, FRANCESCO - University Of Perugia | |
TORRESEN, KIRSTEN - Bioforsk | |
URBANO, JOSE - University Of Sevilla |
Submitted to: Meeting Abstract
Publication Type: Abstract Only Publication Acceptance Date: 7/15/2010 Publication Date: 7/15/2010 Citation: Murdock, A.J., Dogan, I., Nicholls, R.A., Gonzalez Andujar, J., Benoit, D., Davis, A.S., Forcella, F., Graziani, F., Grundy, A., Karlsson, L., Milberg, P., Neve, P., Rasmussen, I.A., Salonnen, J., Sera, B., Sousa, E., Tei, F., Torresen, K., Urbano, J. 2010. Dormancy and germination of Chenopodium album seeds from different latitudes in Europe and the USA [abstract]. European Weed Research Society Symposium Proceedings. 17:A0090. Interpretive Summary: Technical Abstract: Twelve seed lots of Chenopodium album agg. from Canada, Czech Republic, Denmark, Finland, Italy, Norway, Portugal, Spain, Sweden, United Kingdom and the USA were characterized for responses to chilling, light, potassium nitrate and temperature. The research is part of a multi-location experiment performed by the EWRS Germination and Early Growth Working Group. Seeds were collected in two separate years and tested in common conditions in the Seed Science Laboratory at Reading, respectively. Results will be presented to emphasize differences and similarities observed between years and latitudes on the basis that environmental differences of seed maturation conditions in photoperiod and temperature could influence dormancy. Ultimately, the seed characterization reported here is intended to help explain differences observed in the field. Viability did not vary significantly with latitude, but dormancy did; seeds collected from the most southern latitudes in 2006 tended to be more dormant than those from further north. Surprisingly, the optimal constant temperature for germination was correlated with dormancy rather than latitude. The greater dormancy of the southern seed lots was associated with their germination being promoted by a combination of exposure to light and nitrate (0.01 mol/litre potassium nitrate) whereas additive effects were more common in the northern seedlots. Moist chilling for up to 49 days relieved some dormancy in a seed lot from the USA, but other seedlots were either unaffected or showed induced dormancy; the latter effect was unconnected with latitude. Results for both years will be described and implications for emergence in the field discussed. |