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

Gianoli, Ernesto; Gonzáles, Wilfredo L.; Valqui-Peña, David; Clark, Daniel

dc.contributor.author	Valqui-Peña, David
dc.contributor.author	Clark, Daniel
dc.contributor.author	Gianoli, Ernesto
dc.contributor.author	Gonzáles, Wilfredo L.
dc.date.accessioned	2021-10-04T23:01:01Z
dc.date.available	2021-10-04T23:01:01Z
dc.date.issued	2021
dc.identifier.uri	https://hdl.handle.net/20.500.12866/9894
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	en_US
dc.description.sponsorship	Este trabajo fue financiado por FONDECYT-PERU bajo el subsidio que otorgó una beca a David Valqui-Peña [número de contrato 190-2015-FONDECYT-DE].	es_PE
dc.language.iso	eng
dc.publisher	Wiley
dc.relation.ispartofseries	Agronomy Journal
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	Temperature	en_US
dc.subject	germination promoters	en_US
dc.subject	high-Andean	en_US
dc.subject	crop	en_US
dc.subject	maca	en_US
dc.title	Temperature regime influences accessions and effectiveness of germination promoters in the high-Andean crop maca	en_US
dc.type	info:eu-repo/semantics/article
dc.identifier.doi	https://doi.org/10.1002/agj2.20688
dc.subject.ocde	https://purl.org/pe-repo/ocde/ford#4.01.06
dc.relation.issn	1435-0645