Peleja Vanessa Leão, Peleja Poliana Leão, Lara Túlio Silva, Tribuzy Edgard Siza, de Moura José Mauro Sousa
Institute of Biodiversity and Forests, Federal University of Western Pará, Santarém CEP 68040-255, Brazil.
Institute of Water Science and Technology, Federal University of Western Pará, Santarém CEP 68040-255, Brazil.
Plants (Basel). 2022 Jul 27;11(15):1956. doi: 10.3390/plants11151956.
The low availability of phosphorus and water in soil can promote the remobilization of carbohydrates in the plant, releasing energy to mitigate stress. In this context, our objective was to analyze the production and allocation of carbohydrates in plants of Carapa guianensis Aubl. submitted to different doses of phosphate fertilization, during the rainy and dry seasons, in the western region of Pará. We used three phosphorus dosages (0, 50, 250 kg ha−1) as treatments. We evaluated the plants during the dry and wet seasons. We quantified dry matter production, phosphorus content, total soluble sugars, reducing sugars, sucrose, and starch. Phosphate fertilization and different evaluation periods influenced carbohydrate concentrations (p < 0.05) in plants. The highest levels of P in the leaves were registered in October and, in the roots the content decreased with the passage of time in all treatments. The control had higher dry matter production in leaves and stems. During the dry season, there was an accumulation of carbohydrates in plants and a low production of dry matter. Soluble sugars and sucrose tended to be allocated to the stem, reducing sugars to the leaves and starch to the roots, in most periods. In general, C. guianensis seedlings were not very responsive to phosphorus addition.
土壤中磷和水分的有效性较低会促进植物体内碳水化合物的再调动，释放能量以缓解胁迫。在此背景下，我们的目标是分析圭亚那卡拉帕树（Carapa guianensis Aubl.）植株在帕拉州西部地区雨季和旱季，施用不同剂量磷肥时碳水化合物的产生和分配情况。我们采用三种磷剂量（0、50、250千克·公顷⁻¹）作为处理。我们在旱季和雨季对植株进行评估。我们对干物质产量、磷含量、总可溶性糖、还原糖、蔗糖和淀粉进行了量化。磷肥施用和不同评估时期影响了植株体内碳水化合物的浓度（p < 0.05）。叶片中磷含量最高出现在10月，在所有处理中，根中的磷含量随时间下降。对照在叶片和茎中的干物质产量较高。在旱季，植株体内有碳水化合物积累且干物质产量较低。在大多数时期，可溶性糖和蔗糖倾向于分配到茎中，还原糖分配到叶片中，淀粉分配到根中。总体而言，圭亚那卡拉帕树幼苗对添加磷的反应不太明显。
