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

Singh, Akanksha; Lehner, Inea and Schoeb, Christian (2022) Effect of Drought on Bean Yield Is Mediated by Intraspecific Variation in Crop Mixtures. Frontiers in Plant Science, 13 (813417), pp. 1-10.

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Document available online at: https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2022.813417/full


Summary in the original language of the document

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.


EPrint Type:Journal paper
Keywords:beans, crop diversification
Agrovoc keywords:
Language
Value
URI
English
beans
http://aims.fao.org/aos/agrovoc/c_331566
English
crop diversification -> diversification
http://aims.fao.org/aos/agrovoc/c_2344
Subjects: Crop husbandry > Crop combinations and interactions
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Environmental aspects > Biodiversity and ecosystem services
Research affiliation: Switzerland > ETHZ - Agrarwissenschaften
DOI:10.3389/fpls.2022.813417
Deposited By: Singh, Dr. Akanksha
ID Code:52746
Deposited On:11 Mar 2024 11:17
Last Modified:11 Mar 2024 11:17
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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