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Relationships between climate at origin and seedling traits in eight Panafrican provenances of Vitellaria paradoxa C.F. Gaertn. under imposed drought stress

Authors: Bayala, J.; Sanon, Z.; Bazié, P.; Sanou, Josias; Roupsard, O.; Jourdan, Christine; Ræbild, Anders; +4 Authors

Relationships between climate at origin and seedling traits in eight Panafrican provenances of Vitellaria paradoxa C.F. Gaertn. under imposed drought stress

Abstract

The morphological responses of seedlings of eight African provenances of Vitellaria paradoxa (Shea tree or Karite) to imposed draught stress were compared under nursery experimental conditions. The potted seedlings were subjected to three different watering regimes (87 days after sowing): no water stress (100% of the field capacity, C), moderate water stress (75% of C) and severe water stress (50% of C). Before the application of the stress, we observed genotypical differences in the morphological variables at the scale of leaves and of above-ground parts. The six-month water stress affected aerial growth: all provenances responded to drought by down-regulating growth (in height and in diameter), leaf number and area. Katawki provenance of Uganda performed relatively poorly, possibly of it being a nilotica subspecies, contrary to the others (paradoxa subspecies). There was a lack of correlation between climate of seeds origin, seed characteristics, seeds germination and survival rate of seedlings. The study confirmed the importance of leaf area in the vigor of the initial growth in this species. Thus, Tamale and Karaba provenances performed better than other West African provenances due to their larger leaf area, which was found to be a determining factor of relative growth in height at the seedling stage.

Countries
France, Denmark
Keywords

Morphological variables, P40 - Météorologie et climatologie, Stress dû à la sécheresse, Water stress, croissance et développement [F62 - Physiologie végétale], Vitellaria paradoxa, adaptation aux changements climatiques, Essai de provenances, F30 - Génétique et amélioration des plantes, Parklands, Climate change, Croissance, 580, Changement climatique, Morphologie végétale, Relative growth, Surface foliaire, Plant, Résistance à la sécheresse, Provenance, Pépinière, agrovoc: agrovoc:c_5973, agrovoc: agrovoc:c_16022, agrovoc: agrovoc:c_3394, agrovoc: agrovoc:c_15235, agrovoc: agrovoc:c_36850, agrovoc: agrovoc:c_13434, agrovoc: agrovoc:c_24993, agrovoc: agrovoc:c_1374567058134, agrovoc: agrovoc:c_16110, agrovoc: agrovoc:c_16111, agrovoc: agrovoc:c_2392, agrovoc: agrovoc:c_8038, agrovoc: agrovoc:c_8355, agrovoc: agrovoc:c_1666

  • BIP!
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    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    6
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
6
Top 10%
Average
Average
bronze