Impact of Sinorhizobium meliloti strains and plant population on regrowth and nodule regeneration of alfalfa after a freezing event

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creativework.keywords - en
alfalfa
freezing stress
nodules
cold adaptation
symbiosis
acclimatization
creativework.keywords - fr
luzerne
symbiose
nodosités
stress dû au gel
adaptation au froid
acclimatation
dc.contributor.author
D'Amour, Emmanuelle
Bertrand, Annick
Cloutier, Jean
Claessens, Annie
Rocher, Solen
Seguin, Philippe
dc.date.accepted
2022-08-14
dc.date.accessioned
2024-11-04T21:06:55Z
dc.date.available
2024-11-04T21:06:55Z
dc.date.issued
2022-08-25
dc.date.submitted
2022-06-30
dc.description.abstract - en
Purpose The increase in frequency of freeze–thaw episodes with the diminution of snow cover protection due to climate change compromises the winter survival of alfalfa (Medicago sativa L.). Symbiosis with cold-tolerant rhizobial strains can improve the ability of alfalfa to survive and grow under stressful conditions. Methods Six strains of Sinorhizobium (Ensifer) meliloti were tested in combination with two alfalfa populations bred to differ in their levels of freezing tolerance. Plants of each different combination were grown for eight weeks in a growth chamber before being exposed to temperatures promoting their acclimation to cold. Plants were then exposed to a freezing stress (-11ºC) and regrown for three weeks. Shoot, root and nodule biomass were measured before cold acclimation and three weeks after the freezing stress. Results After freezing stress, the alfalfa population A-TF7 had shoot and root biomasses that were respectively 19% and 15% larger than cultivar A-TF0. Alfalfa plants inoculated with strain NRG34 showed both a larger shoot biomass and a higher nodule dry weight than plants inoculated with any other strains. Assessment of freezing damages on nodules showed that plants inoculated with NRG34 had the largest proportion of undamaged nodules or of nodules with a regeneration zone. Conclusion This study shows for the first time a relationship between nodule and shoot regrowth after a freezing stress, the latter being linked with the proportion of nodules showing less freezing damage. Our results demonstrated that both the choice of alfalfa populations and S. meliloti strains adapted to stress are complementary to increasing alfalfa persistence.
dc.identifier.citation
D’Amours, E., Bertrand, A., Cloutier, J., Claessens, A., Rocher, S., & Seguin, P. (2022). Impact of Sinorhizobium meliloti strains and plant population on regrowth and nodule regeneration of alfalfa after a freezing event. Plant and Soil, 500(1-2), 161–179. https://doi.org/10.1007/s11104-022-05662-4
dc.identifier.doi
https://doi.org/10.1007/s11104-022-05662-4
dc.identifier.issn
1573-5036
0032-079X
dc.identifier.uri
https://open-science.canada.ca/handle/123456789/3105
dc.language.iso
en
dc.publisher - en
Springer Nature
dc.rights - en
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.rights - fr
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.rights.uri - en
https://creativecommons.org/licenses/by/4.0/
dc.rights.uri - fr
https://creativecommons.org/licenses/by/4.0/deed.fr
dc.subject - en
Crops
Agriculture
dc.subject - fr
Cultures
Agriculture
dc.subject.en - en
Crops
Agriculture
dc.subject.fr - fr
Cultures
Agriculture
dc.title - en
Impact of Sinorhizobium meliloti strains and plant population on regrowth and nodule regeneration of alfalfa after a freezing event
dc.type - en
Article
dc.type - fr
Article
local.article.journalissue
1-2
local.article.journaltitle - en
Plant and Soil
local.article.journalvolume
500
local.pagination
161-179
local.peerreview - en
Yes
local.peerreview - fr
Oui
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