Comparative highlights of morphological, phytochemical and nutritional key characteristics of Mediterranean Lupinus species

Lupinus species are valuable for sustainable agriculture due to their high protein content, adaptability, and bioactive compounds. This study assessed the morphological, nutritional, and phytochemical diversity of Lupinus albus, L. luteus, and L. pilosus using 27 agro-morphological traits and analytical techniques (GC–MS, GC-FID, HPLC, and spectrophotometry). L. pilosus, with its dense leaf pubescence, thrives in arid environments, whereas L. luteus and L. albus, with glabrous leaves, are adaptable to humid conditions. L. albus has the shortest ripening period (208.61 ± 12.79 days) and the highest protein (37.18 ± 2.37 %) and nitrogen (5.95 ± 0.38 %) content. L. pilosus exhibits the strongest antioxidant activity (ABTS: 84.5 %) due to its rich flavonoid and phenolic profile, while L. albus differ with its nutraceutical potential. Additionally, 38.88 % of L. albus seeds are “sweet”, improving edibility. These findings highlight L. albus as an optimal candidate for genetic improvement and sustainable agriculture, particularly in Mediterranean regions.