Physiological performance of Hancornia speciosa Gomes seedlings under different watering conditions: growth and chlorophyll a fluorescence
Palavras-chave:
mangaba tree, photosynthetic pigments, root to shoot ratio, water stressResumo
(Physiological performance of Hancornia speciosa Gomes seedlings under different watering conditions: growth and chlorophyll a fluorescence). To gain a better understanding of the physiological responses of the Hancornia speciosa (mangaba tree) to water stress, the aim of the present study was to evaluate initial growth, chlorophyll content and chlorophyll a fluorescence in mangaba seedlings under different watering conditions (daily irrigation and intervals of two, four and six days between watering). Water cycles did not negatively affect stem diameter, leaf area or chlorophyll content. Plants grown with watering at six-day intervals had a better performance in terms of plant height and number of leaves. The differences observed in Fm, Fv, Fv/Fm and PI do not represent a negative effect, indicating no damage to PSII. The findings suggest that mangaba seedlings are tolerant to intermittent drought and six-day intervals between watering may favor growth in the early development phase.Downloads
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