nitrate natural biostimulants nutritional quality tropical plant extract Brillouin light scattering microscopy Diplotaxis erucoides L. Diplotaxis tenuifolia (L.) DC GABA HPLC Jute Lactuca sativa L. Ocimum basilicum L SPAD index Spinacia oleracea L. amino acid amino acids anthocyanins ascorbic acid atomic layer deposition benzimidazole chloride toxicity ethnic vegetable ferromagnet functional and nutritional quality greenhouse conditions ion homeostasis legume-derived protein hydrolysate macro-minerals magnetoresistance magnonics mineral profile nanotube nickel nitrogen use efficiency photosynthesis polyphenols production protein hydrolysate proton pump inhibitor root-to-shoot salt tolerance seaweed extract small bioactive molecules spin wave sugars sustainable horticulture