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Temperature regime influences accessions and effectiveness of germination promoters in the high-Andean crop maca

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dc.contributor.author Valqui-Peña D. es_PE
dc.contributor.author Clark D. es_PE
dc.contributor.author Gianoli E. es_PE
dc.contributor.author Gonzáles W.L. es_PE
dc.date.accessioned 2024-05-30T23:13:38Z
dc.date.available 2024-05-30T23:13:38Z
dc.date.issued 2021
dc.description This work was supported by the Fondo Nacional de Desarrollo Cient?fico, Tecnol?gico y de Innovaci?n Tecnol?gica (FONDECYT-PERU) under Grant 190-2015-FONDECYT-DE which provided a fellowship for David Valqui-Pe?a. We thank Mois?s Alderete, Arturo C?rdenas, and Efra?n Z??iga for providing the seed accessions of maca. We are also grateful to Ang?lica P?rez, Jonhny V?lchez, Ovaldo Rojas, and Fluber Mamani, as well as the ?Asociaci?n de Productores Agropecuarios Org?nicos de Carhuamayo? for generously sharing their knowledge on this crop. Finally, we thank Cristina Guerra-Giraldez for proofreading the?manuscript.
dc.description.abstract High-Andean crops are precious resources for low-income farmers threatened by climate conditions. In the Puna region of the central Peruvian Andes, poor farmers grow maca (Lepidium meyenii Walpers), a root crop endemic to this region, under extreme environmental conditions. The performance ranking of crop accessions may vary with climate variability due to interactions between genotypes and the environment, but this issue has not been addressed for maca crops. Here we used three thermal setups under laboratory conditions and tested the effects of temperature regime, seed accession, and germination promoters on seed germination and seedling performance traits of maca plants. We found significant temperature × accession (T × A) interactions for most response variables, that is, the performance ranking of accessions varied with temperature regimes. The positive effects of promoters (gibberellic acid, GA; sodium hypochlorite, SH) on germination and seedling emergence variables were not additive and showed a clear trend to be greater at lower temperatures. Because available maca accessions still require the Andean Puna´s cold environment to develop their hypocotyls fully, the selection of accessions with better tolerance to higher temperatures should be taken as a long-term challenge. In the short term, our findings strongly suggest that maca growers might use GA as a promoter to overcome limitations imposed on seed germination and seedling emergence by low temperatures at the crop-growing areas.
dc.description.sponsorship Fondo Nacional de Desarrollo Científico y Tecnológico - Fondecyt
dc.identifier.doi https://doi.org/10.1002/agj2.20688
dc.identifier.scopus 2-s2.0-85107007796
dc.identifier.uri https://hdl.handle.net/20.500.12390/3061
dc.language.iso eng
dc.publisher John Wiley and Sons Inc
dc.relation.ispartof Agronomy Journal
dc.rights info:eu-repo/semantics/openAccess
dc.subject MET
dc.subject maca es_PE
dc.subject germination es_PE
dc.subject gibberellic acid es_PE
dc.subject mean emergence time es_PE
dc.subject mean germination es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.06.15
dc.title Temperature regime influences accessions and effectiveness of germination promoters in the high-Andean crop maca
dc.type info:eu-repo/semantics/article
dspace.entity.type Publication
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