New wild Brassica oleracea L. germplasm at its western distribution limit in the Iberian Peninsula

González, María Elena Cartea; Márquez, Margarita Lema

doi:10.5209/rev_laza.2015.v36.49213

Cited by 1 publication

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“…For this research, two independent experiments were carried out with the capitata (cabbage) and acephala (kale) groups of B. oleracea . Experiment 1 (‘ capitata experiment’) was conducted between October 2013 and January 2014 and included cabbage accessions with different domestication status: the commercial and extensively used cultivar ‘Corazon de Buey Grande’ ( capitata cultivar, Rocalba S.A.), the landrace MBG-BRS535 ( capitata landrace—a local variety collected from Galegos, Lugo, Spain at 42.9385°N, −7.5685°W) and the wild accession EXT-BRS0151 (wild- capitata —collected from sea cliffs in Foz, Lugo, Spain at 43.6279°N, −7.3340°W; Fagundez et al 2015). Experiment 2 (‘ acephala experiment’) was conducted between September and December 2014 and included kale accessions with different domestication status: the commercial and extensively used cultivar ‘Gigante Caballar’ ( acephala cultivar, Rocalba S.A.), the landrace MBG-BRS0510 ( acephala landrace—a local variety collected from Baleira, Lugo, Spain at 43.0285°N, −7.1756°W) and the wild accession EXT-BRS0217 (wild- acephala —collected from sea cliffs in Cudillero, Asturias, Spain at 43.5664°N, −6.1478°W).…”

Section: Methodsmentioning

confidence: 99%

Domestication influences morphological and physiological responses to salinity in Brassica oleracea seedlings

2019

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Brassica oleracea cultivars include important vegetable and forage crops grown worldwide, whereas the wild counterpart occurs naturally on European sea cliffs. Domestication and selection processes have led to phenotypic and genetic divergence between domesticated plants and their wild ancestors that inhabit coastal areas and are exposed to saline conditions. Salinity is one of the most limiting factors for crop production. However, little is known about how salinity affects plants in relation to domestication of B. oleracea. The objective of this study was to determine the influence of domestication status (wild, landrace or cultivar) on the response of different B. oleracea crops to salinity, as measured by seed germination, plant growth, water content and mineral concentration parameters at the seedling stage. For this purpose, two independent pot experiments were conducted with six accessions of B. oleracea, including cabbage (group capitata) and kale (group acephala), in a growth chamber under controlled environmental conditions. In both taxonomic groups, differences in domestication status and salt stress significantly affected all major process such as germination, changes in dry matter, water relations and mineral uptake. In the acephala experiment, the domestication × salinity interaction significantly affected water content parameters and shoot Na+ allocation. At early stages of development, wild plants are more succulent than cultivated plants and have a higher capacity to maintain lower Na+ concentrations in their shoots in response to increasing levels of salinity. Different responses of domesticated and cultivated accessions in relation to these traits indicated a high level of natural variation in wild B. oleracea. Exclusion of Na+ from shoots and increasing succulence may enhance salt tolerance in B. oleracea exposed to extreme salinity in the long term. The wild germplasm can potentially be used to improve the salt tolerance of crops by the identification of useful genes and incorporation of these into salinity-sensitive cultivars.

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Section: Methodsmentioning

confidence: 99%