Tolérance à l’engorgement d’eau chez les arbrisseaux de Parkia gigantocarpa Ducke
DOI :
https://doi.org/10.19182/bft2019.341.a31759Mots-clés
amidon, saccharose, hydrates de carbone solubles totaux, protéines solubles totales, BrésilRésumé
Cette étude se propose d’évaluer les réponses biochimiques des arbrisseaux de Parkia gigantocarpa devant l’engorgement d’eau. L’engorgement est appliqué en inondant les arbrisseaux dans des pots de 14 kg jusqu’à approximativement 5 cm au-dessus de la surface du sol. Le plan expérimental a été façonné aléatoirement et comprenait deux types d’application de l’eau (contrôle et engorgement) sur cinq périodes d’évaluation (après 0, 4, 8, 12 et 16 jours d’engorgement), avec cinq réplications par traitement. Amidon, saccharose, hydrates de carbone solubles totaux et protéines solubles totales ont été mesurés. Les arbrisseaux soumis à engorgement ont montré des réductions significatives des concentrations d’amidon (62,50 %) et de protéines solubles totales (40,98 %), en particulier dans les feuilles. L’engorgement a réduit la concentration de saccharose dans les feuilles (44,38 %), tandis que cette concentration a augmenté dans les racines (76,78 %). La concentration d’hydrates de carbone solubles a augmenté de 106,9 % dans les racines des plantes exposées à l’engorgement. Cette étude a démontré la sensibilité des arbrisseaux de Parkia gigantocarpa à l’engorgement.
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