Olmos-Ruiz Rafael, Garcia-Gomez Pablo, Carvajal Micaela, Yepes-Molina Lucia
Aquaporins Group, Plant Nutrition Department, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Campus Universitario de Espinardo, Murcia, Spain.
J Sci Food Agric. 2024 Jan 15;104(1):235-248. doi: 10.1002/jsfa.12903. Epub 2023 Sep 8.
Recently, vesicles derived from plant cell membranes have received attention for their potential use as active biomolecules and nanocarriers, and obtaining them from organic crops may be an interesting option because different farming systems can affect production, plant secondary metabolism and biochemistry of cell membranes. The present study aimed to determine how organic and conventional farming affects the mineral nutrition, gas exchange, CO fixation and biochemical composition of lemon fruits, which could have an impact on the different fractions of cell membranes in pulp and juice.
Organic trees had higher intrinsic water use efficiency (WUEi) but conventional trees had higher stomatal conductance (gs) and nitrogen use efficiency (NUtE). Also, organic lemons had significantly higher levels of some micronutrients (Ca, Cu, Fe and Zn). Second, the main differences in the membrane vesicles showed that organic pulp vesicles had a higher antioxidant activity and more oleic acid, whereas both types of vesicles from conventional lemons had more linoleic acid.
In conclusion, organic farming did not alter carbon fixation parameters but impacted nitrogen fixation and water uptake, and resulted in higher micronutrient levels in lemons. These mineral nutritional changes could be related to the higher production of membranes that showed suitable morphological traits and a high antioxidant activity, positively correlated with a high amount of oleic acid, which could have stronger cell protection characteristics. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
最近，源自植物细胞膜的囊泡因其作为活性生物分子和纳米载体的潜在用途而受到关注，从有机作物中获取囊泡可能是一个有趣的选择，因为不同的种植系统会影响产量、植物次生代谢和细胞膜的生物化学。本研究旨在确定有机种植和传统种植如何影响柠檬果实的矿质营养、气体交换、二氧化碳固定和生化组成，这可能会对果肉和果汁中细胞膜的不同部分产生影响。
有机种植的树木具有更高的内在水分利用效率（WUEi），但传统种植的树木具有更高的气孔导度（gs）和氮利用效率（NUtE）。此外，有机柠檬中的一些微量营养素（钙、铜、铁和锌）含量显著更高。其次，膜囊泡的主要差异表明，有机果肉囊泡具有更高的抗氧化活性和更多的油酸，而传统柠檬的两种囊泡都含有更多的亚油酸。
总之，有机种植并未改变碳固定参数，但影响了氮固定和水分吸收，并导致柠檬中微量营养素含量更高。这些矿质营养变化可能与具有合适形态特征和高抗氧化活性的膜的产量增加有关，与大量油酸呈正相关，油酸可能具有更强的细胞保护特性。© 2023作者。由John Wiley & Sons Ltd代表化学工业协会出版的《食品与农业科学杂志》。
