ABSTRACT

The purple passion fruit (Passiflora edulis Sims f. edulis) is a promising crop in Colombia because of its high potential for international markets and high profitability. However, without adequate fertilization, the metabolic processes of plant growth can be affected. The objective of this research was to evaluate the effect of macro- and micronutrient deficiencies on growth, photosynthesis, and transpiration in purple passion fruit plants during vegetative development. Seedlings with four to six leaves (three-months-old) were transplanted to a sand culture and subjected to mineral deficiencies using the missing element technique under greenhouse conditions. The plants subjected to Fe deficiency had the lowest maximum photosynthetic rate at saturation by light (1.72 µmol CO₂ m⁻²s⁻¹) at 72 days after treatment, while the lowest apparent quantum efficiency (0.008 µmol CO₂ µmol photons⁻¹) was observed in the plants with Mg deficiency. The lowest values of maximum photochemical efficiency of photosystem II, Fv/Fm (0.69) and transpiration rate (2.39 µg H₂O cm⁻²s⁻¹) were found in the plants with P deficiency. The mineral nutrient deficiencies negatively affected metabolic processes in the purple passion fruit plants, with the highest impact on photosynthesis observed with the Fe or Mg deficiencies. The plants subjected to P deficiencies were the most affected plants in terms of transpiration rate.

摘要

紫色百香果（Passiflora edulis Sims f。edulis）在哥伦比亚是很有前途的作物，因为它具有很高的国际市场潜力和高利润率。但是，如果不适当施肥，植物生长的代谢过程可能会受到影响。这项研究的目的是评估营养丰富期间紫色和西番莲植物中微量元素和微量元素缺乏对生长，光合作用和蒸腾作用的影响。将四到六片叶子（三个月大）的幼苗移植到沙土栽培中，并在温室条件下使用缺失元素技术进行矿物质缺乏。缺铁植物在光饱和下的最大光合速率最低（1.72 µmol CO处理后第72天为₂ m ^-2 s ^-1），而在缺镁植物中观察到最低的表观量子效率（0.008 µmol CO ₂ µmol光子^-1）。在缺磷植物中，光系统II的最大光化学效率，Fv / Fm（0.69）和蒸腾速率（2.39 µg H ₂ O cm ^-2 s ^-1）最低。矿质营养素缺乏对紫色百香果植物的代谢过程产生负面影响，其中铁或镁缺乏对光合作用的影响最大。就蒸腾速率而言，遭受磷缺乏的植物是受影响最大的植物。