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| Hauptseite > Publikationsdatenbank > Diversity in root growth responses to moisture deficit in young faba bean ( Vicia faba L.) plants |
| Hauptseite > Publikationsdatenbank > Diversity in root growth responses to moisture deficit in young faba bean ( Vicia faba L.) plants |
| Journal Article | FZJ-2018-01394 |
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2018
London [u.a.]
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Please use a persistent id in citations: http://hdl.handle.net/2128/17580 doi:10.7717/peerj.4401
Abstract: BackgroundSoil moisture deficiency causes yield reduction and instability in faba bean (Vicia faba L.) production. The extent of sensitivity to drought stress varies across accessions originating from diverse moisture regimes of the world. Hence, we conducted successive greenhouse experiments in pots and rhizotrons to explore diversity in root responses to soil water deficit.MethodsA set of 89 accessions from wet and dry growing regions of the world was defined according to the Focused Identification of Germplasm Strategy and screened in a perlite-sand medium under well watered conditions in a greenhouse experiment. Stomatal conductance, canopy temperature, chlorophyll concentration, and root and shoot dry weights were recorded during the fifth week of growth. Eight accessions representing the range of responses were selected for further investigation. Starting five days after germination, they were subjected to a root phenotyping experiment using the automated phenotyping platform GROWSCREEN-Rhizo. The rhizotrons were filled with peat-soil under well watered and water limited conditions. Root architectural traits were recorded five, 12, and 19 days after the treatment (DAT) began.ResultsIn the germplasm survey, accessions from dry regions showed significantly higher values of chlorophyll concentration, shoot and root dry weights than those from wet regions. Root and shoot dry weight as well as seed weight, and chlorophyll concentration were positively correlated with each other. Accession DS70622 combined higher values of root an
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