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[ Article ] Association between vitamin content, plant morphology and geographical origin in a worldwide collection of the orphan crop Gynandropsis gynandra (Cleomaceae)

Date de soumission: 29-10-2020
Année de Publication: 2019
Entité/Laboratoire Laboratoire Horticulture and Genetics Unit
Document type : Article
Discipline(s) : Agriculture & Agronomie
Titre Association between vitamin content, plant morphology and geographical origin in a worldwide collection of the orphan crop Gynandropsis gynandra (Cleomaceae)
Auteurs Sogbohossou E. O. Dêêdi [1], Kortekaas Dieke [2], Achigan‑Dako Enoch G. [3], Maundu Patrick [4], Stoilova Tsvetelina [5], Deynze Allen Van [6],
Journal: Planta
Catégorie Journal: Internationale
Impact factor: 3.11
Volume Journal: 250
DOI: https://doi.org/10.1007/s00425-019-03142-1
Resume We examined the variation in carotenoids, tocopherols and ascorbic acid as well as morphological traits in a worldwide germplasm of 76 accessions of the orphan leafy vegetable Gynandropsis gynandra (Cleomaceae) using greenhouse experiments and high-performance liquid chromatography analysis. The levels of carotenoids and tocopherols accumulating in the leaves varied significantly across accessions and were linked with the geographical origin and morphological variation. The main carotenoids included lutein, β-carotene, α-carotene and violaxanthin. A twofold to threefold variation was observed for these compounds. The main tocopherols detected were α-tocopherol and γ-tocopherol with a 20-fold variation. A ninefold variation in vitamin C concentration and independent of geographical origin was observed. Overall, the accessions were grouped into three clusters based on variation in nutrient content and morphology. West African accessions were short plants with small leaves and with high tocopherol contents and relatively low carotenoid contents, Asian accessions were short plants with broad leaves and with relatively low carotenoid and high tocopherol contents, while East–Southern African plants were tall with high contents of both carotenoids and chlorophylls and low tocopherol contents. Carotenoids were positively correlated with plant height as well as foliar and floral traits but negatively correlated with tocopherols. The absence of a significant correlation between vitamin C and other traits indicated that breeding for high carotenoids or tocopherols content may be coupled with improved leaf yield and vitamin C content. Our study provides baseline information on the natural variation available for traits of interest for breeding for enhanced crop yield and nutrient content in Gynandropsis gynandra.
Mots clés Gynandropsis gynandra · Leafy vegetable · Vitamins · Morphology · Natural variation · Geography
Pages 933 - 947
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