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The inability of barley to germinate after submergence depends on hypoxia-induced secondary dormancy.

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Název: The inability of barley to germinate after submergence depends on hypoxia-induced secondary dormancy.
Autoři: Gómez-Álvarez, Eva María, Tondelli, Alessandro, Nghi, Khac Nhu, Voloboeva, Viktoriia, Giordano, Guido, Valè, Giampiero, Perata, Pierdomenico, Pucciariello, Chiara
Zdroj: Journal of Experimental Botany; 8/3/2023, Vol. 74 Issue 14, p4277-4289, 13p
Témata: GENOME-wide association studies, CLIMATE change, HORDEUM, AGRICULTURAL productivity, BARLEY, OXYGEN in water
Abstrakt: 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. [ABSTRACT FROM AUTHOR]
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Databáze: Complementary Index
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Abstrakt: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. [ABSTRACT FROM AUTHOR]
ISSN:00220957
DOI:10.1093/jxb/erad151