Nutritional traits of bean ( Phaseolus vulgaris ) seeds from plants chronically exposed to ozone pollution.
The effect of chronic exposure to ozone pollution on nutritional traits of bean ( Phaseolus vulgaris L. cv. Borlotto Nano Lingua di Fuoco) seeds from plants grown in filtered and nonfiltered open-top chambers (OTCs) has been investigated. Results showed that, among seed macronutrients, ozone significantly raised total lipids, crude proteins, and dietary fiber and slightly decreased total free amino acid content, although with a significant reduction of asparagine, lysine, valine, methionine, and glycine, compensated by a conspicuous augmentation of ornithine and tryptophan. Phytosterol analysis showed a marked increase of beta-sitosterol, stigmasterol, and campesterol in seeds collected from nonfiltered OTCs. With regard to secondary metabolites, ozone exposure induced a slight increase of total polyphenol content, although causing a significant reduction of some flavonols (aglycone kaempferol and its 3-glucoside derivative) and hydroxycinnamates (caffeic, p-coumaric, and sinapic acids). Total anthocyanins decreased significantly, too. Nevertheless, ozone-exposed seeds showed higher antioxidant activity, with higher Trolox equivalent antioxidant capacity (TEAC) values than those measured in seeds collected from filtered air.
Iriti
Marcello
M
Istituto di Patologia Vegetale, Universita di Milano, Milano, Italy. marcello.iriti@unimi.it
Di Maro
Antimo
A
Bernasconi
Silvana
S
Burlini
Nedda
N
Simonetti
Paolo
P
Picchi
Valentina
V
Panigada
Cinzia
C
Gerosa
Giacomo
G
Parente
Augusto
A
Faoro
Franco
F
D000393:Air Pollutants / Q000633:toxicity*; D000596:Amino Acids / Q000032:analysis; D000975:Antioxidants / Q000032:analysis; D003373:Coumaric Acids / Q000032:analysis; D004043:Dietary Fiber / Q000032:analysis; D004044:Dietary Proteins / Q000032:analysis; D005419:Flavonoids / Q000032:analysis; D008055:Lipids / Q000032:analysis; D009753:Nutritive Value; D010126:Ozone / Q000633:toxicity*; D027805:Phaseolus / Q000737:chemistry* / Q000187:drug effects; D012639:Seeds / Q000737:chemistry* / Q000187:drug effects
D000393:Air Pollutants; D000596:Amino Acids; D000975:Antioxidants; D003373:Coumaric Acids; D004043:Dietary Fiber; D004044:Dietary Proteins; D005419:Flavonoids; D008055:Lipids; D010126:Ozone