Relationships between climate at origin and seedling traits in eight Panafrican provenances of Vitellaria paradoxa C.F. Gaertn. under imposed drought stress
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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. / Bayala, J.; Sanon, Z.; Bazié, P.; Sanou, Josias; Roupsard, O.; Jourdan, Christine ; Ræbild, Anders; Kelly, B. C.; Okullo, J. B L; Thiam, Massamba; Yidana, J.
In: Agroforestry Systems, Vol. 92, No. 6, 2018, p. 1455-1467.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Relationships between climate at origin and seedling traits in eight Panafrican provenances of Vitellaria paradoxa C.F. Gaertn. under imposed drought stress
AU - Bayala, J.
AU - Sanon, Z.
AU - Bazié, P.
AU - Sanou, Josias
AU - Roupsard, O.
AU - Jourdan, Christine
AU - Ræbild, Anders
AU - Kelly, B. C.
AU - Okullo, J. B L
AU - Thiam, Massamba
AU - Yidana, J.
PY - 2018
Y1 - 2018
N2 - The morphological responses of seedlings of eight African provenances of Vitellaria paradoxa (Shea tree or Karité) 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.
AB - The morphological responses of seedlings of eight African provenances of Vitellaria paradoxa (Shea tree or Karité) 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.
KW - Climate change
KW - Morphological variables
KW - Parklands
KW - Relative growth
KW - Water stress
U2 - 10.1007/s10457-017-0091-8
DO - 10.1007/s10457-017-0091-8
M3 - Journal article
AN - SCOPUS:85017162202
VL - 92
SP - 1455
EP - 1467
JO - Agroforestry Systems
JF - Agroforestry Systems
SN - 0167-4366
IS - 6
ER -
ID: 177188120