AI Article Synopsis
- Global climate change is causing more frequent flooding, which negatively affects crop production, particularly barley, a crucial cereal.
- Researchers tested various barley varieties' ability to germinate after flooding and found that sensitive varieties enter a state of secondary dormancy due to low oxygen levels.
- The study identified a specific Laccase gene linked to this dormancy response, providing insights that could help breeders enhance barley genetics for better resilience to flood conditions.
Article Abstract
Global climate change has dramatically increased flooding events, which have a strong impact on crop production. Barley (Hordeum vulgare) is one of the most important cereals and its cultivation includes a broad range of different environments. We tested the capacity to germinate of a large barley panel after a short period of submergence followed by a period of recovery. We demonstrate that sensitive barley varieties activate underwater secondary dormancy because of a lower permeability to oxygen dissolved in water. In sensitive barley accessions, secondary dormancy is removed by nitric oxide donors. The results of a genome-wide association study uncovered a Laccase gene located in a region of significant marker-trait association that is differently regulated during grain development and plays a key role in this process. Our findings will help breeders to improve the genetics of barley, thereby increasing the capacity of seeds to germinate after a short period of flooding.
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| http://dx.doi.org/10.1093/jxb/erad151 | DOI Listing |
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