*4.1. Plant Material*

Seeds of common bean *P. vulgaris* L. cultivar *Riñón*, from the Protected Geographical Identification *La Bañeza-León* region (Spain), were sterilized with 70% (*v*/*v*) ethanol for 30 s and 0.4% (*w*/*v*) NaClO for 20 min, prior to washing with sterile water. Germination took place under in vitro conditions using glass jars (946 mL of volume) with universal sterilized substrate (Blumenerde, Gramoflor, made in Germany). Plants were grown in a growth chamber at 25 ± 2 ◦C with a 16 h photoperiod under a photon flux density of <sup>45</sup> ± <sup>5</sup> <sup>μ</sup>mol m<sup>−</sup>2s−<sup>1</sup> provided by daylight fluorescent tubes (TLD 36W/830, Philips), as indicated in De la Rubia et al. (2021) [47].
