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Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures

Increasing plant diversity in agricultural systems provides promising solutions for sustainably increasing crop yield. It remains unclear; however, how plant–plant interactions in diverse systems are mediated by plant genetic variation. We conducted a greenhouse experiment in which we grew three var...

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Autores principales: Singh, Akanksha, Lehner, Inea, Schöb, Christian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8829134/
https://www.ncbi.nlm.nih.gov/pubmed/35154224
http://dx.doi.org/10.3389/fpls.2022.813417
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author Singh, Akanksha
Lehner, Inea
Schöb, Christian
author_facet Singh, Akanksha
Lehner, Inea
Schöb, Christian
author_sort Singh, Akanksha
collection PubMed
description Increasing plant diversity in agricultural systems provides promising solutions for sustainably increasing crop yield. It remains unclear; however, how plant–plant interactions in diverse systems are mediated by plant genetic variation. We conducted a greenhouse experiment in which we grew three varieties of common beans with three companion plant species (chickpeas, sorghum, and sunflower) in different combinations (crop mixtures, bean cultivar mixtures, and monocultures), with and without drought stress. We hypothesized that under drought stress, the effect of companion plant species on bean yield would be mediated by the drought tolerance potential of the species. We further hypothesized that this effect would vary across different bean cultivars. Overall, we show that the effect of companion plant species on bean yield was not influenced by drought stress; instead, it was dependent on the identity of the bean variety. This could partially be explained by variation in growth rate between bean varieties, where the fastest growing variety recorded the highest yield increase in plant mixtures. The effect of companion plant species on chickpea biomass, however, was potentially influenced by chickpea drought tolerance potential; chickpea biomass was recorded to be higher in plant mixtures than in its monoculture under drought conditions. Our study highlights that to develop plant mixtures, it is not only important to consider the functional traits of the interacting plant species, but also those of the different plant varieties. We further suggest that stress tolerance can be a useful trait for initial selection of plant varieties when developing crop mixtures.
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spelling pubmed-88291342022-02-11 Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures Singh, Akanksha Lehner, Inea Schöb, Christian Front Plant Sci Plant Science Increasing plant diversity in agricultural systems provides promising solutions for sustainably increasing crop yield. It remains unclear; however, how plant–plant interactions in diverse systems are mediated by plant genetic variation. We conducted a greenhouse experiment in which we grew three varieties of common beans with three companion plant species (chickpeas, sorghum, and sunflower) in different combinations (crop mixtures, bean cultivar mixtures, and monocultures), with and without drought stress. We hypothesized that under drought stress, the effect of companion plant species on bean yield would be mediated by the drought tolerance potential of the species. We further hypothesized that this effect would vary across different bean cultivars. Overall, we show that the effect of companion plant species on bean yield was not influenced by drought stress; instead, it was dependent on the identity of the bean variety. This could partially be explained by variation in growth rate between bean varieties, where the fastest growing variety recorded the highest yield increase in plant mixtures. The effect of companion plant species on chickpea biomass, however, was potentially influenced by chickpea drought tolerance potential; chickpea biomass was recorded to be higher in plant mixtures than in its monoculture under drought conditions. Our study highlights that to develop plant mixtures, it is not only important to consider the functional traits of the interacting plant species, but also those of the different plant varieties. We further suggest that stress tolerance can be a useful trait for initial selection of plant varieties when developing crop mixtures. Frontiers Media S.A. 2022-01-27 /pmc/articles/PMC8829134/ /pubmed/35154224 http://dx.doi.org/10.3389/fpls.2022.813417 Text en Copyright © 2022 Singh, Lehner and Schöb. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Singh, Akanksha
Lehner, Inea
Schöb, Christian
Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures
title Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures
title_full Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures
title_fullStr Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures
title_full_unstemmed Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures
title_short Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures
title_sort effect of drought on bean yield is mediated by intraspecific variation in crop mixtures
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8829134/
https://www.ncbi.nlm.nih.gov/pubmed/35154224
http://dx.doi.org/10.3389/fpls.2022.813417
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