TABLE 3.

Impact of light regime and substrate on putative biosurfactant formation by Pseudomonas agarici (normal font) and Pseudomonas sp. DR 5-09 (italics) as assessed by drop collapse test.

Sources	Group 1	Group 2	Group 3	Group 4	Group 5
N	Glycine-glutamic acid, m-tartaric acid, caproic acid, L-isoleucine, L-valine, L-leucine	Succinic acid, D,L-malic acid, glycerol, D-galactonic acid-g-lactone, acetic acid, D-maltose, D-glucosaminic acid, and α-keto-glutaric	D-glucoronic acid, 4-hydroxy-benzoic acid, malonic acid, and caproic acid	L-isoleucine, citraconic acid	L-arabinose, α-keto-valeric acid, 2-hydroxy-benzoic acid, and γ-hydroxy-butyric
P	D-asparagine, sodium nitrite, sodium nitrate, glycine, L-isoleucine,L-valine, and D-lysine	Sodium nitrite, sodium nitrate, glycine, L-isoleucine, D-lysine, ethanolamine, cytosine, thymine, uracil, δ-amino-valeric acid, glycine-methionine, adenine, and guanine	L -threonine
S	Cysteamine-S-phosphate, parabanic acid, thymidine-3′-monophosphate	Negative control, trietyl phosphate, hypophosphite, phosphor-glycolic acid, cytidine-5′-monophosphate, phosphor-L-arginine, phosphono acetic acid, methylene diphosphonic acid, thymidine-5′-monophosphate, Allantoin, D-2-phospho glyceric acid

The compounds in bold font had the same reaction norm for both strains (Group 1: Absence of drop collapse at lower respiration rates when exposed to blue LEDs compared with the other light regimes; Group 2: Absence of drop collapse when exposed to blue LEDs, but respiration rates comparable between the four light regimes; Group 3: Absence of drop collapse at low respiration rates when exposed to either blue or white LEDs; Group 4: Absence of drop collapse when exposed to either blue or white LEDs with lower respiration for blue and maintained for white LED treatments; Group 5: Enhanced drop collapse when exposed to blue LED, but not to other light regimes). N, nitrogen; P, phosphorus; S, sulfur.