Sub-tropical urban environment affecting content and composition of non-structural carbohydrates of Lolium multiflorum ssp. italicum cv. Lema.
This study analyzed the relationship between environmental factors, especially air pollution and climatic conditions, and non-structural carbohydrates (NSC) in plants of Lolium multiflorum exposed during 10 consecutive periods of 28 days at a polluted site (Congonhas) and at a reference site in São Paulo city (Brazil). After exposure, NSC composition and leaf concentrations of Al, Fe, Cu, Zn, Pb and Cd were measured. The seasonal pattern of NSC accumulation was quite similar in both sites, but plants at Congonhas showed higher concentrations of these compounds, especially fructans of low and medium degree of polymerization. Regression analysis showed that NSC in plants growing at the polluted site were explained by variations on temperature and leaf concentration of Fe (positive effect), as well as relative humidity and particulate material (negative effect). NSC in the standardized grass culture, in addition to heavy metal accumulation, may indicate stressing conditions in a sub-tropical polluted environment.
Instituto de Botânica, Caixa Postal 3005, 01061-970 São Paulo, SP, Brazil.
Carla Zuliani
CZ
Sandrin
Rita de Cássia Leone
Rde C
Figueiredo-Ribeiro
Maria Angela Machado de
MA
Carvalho
Welington Braz Carvalho
WB
Delitti
Marisa
M
Domingos
D000393:Air Pollutants / Q000032:analysis*; D000535:Aluminum / Q000032:analysis; D001938:Brazil; D002104:Cadmium / Q000032:analysis; D002241:Carbohydrates / Q000737:chemistry*; D002947:Cities; D002980:Climate; D003300:Copper / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods; D007501:Iron / Q000032:analysis; D007854:Lead / Q000032:analysis; D008129:Lolium / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis*; D052638:Particulate Matter; D018515:Plant Leaves / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis; D001335:Vehicle Emissions
D000393:Air Pollutants; D002241:Carbohydrates; D019216:Metals, Heavy; D052638:Particulate Matter; D012989:Soil Pollutants; D001335:Vehicle Emissions; D002104:Cadmium; D007854:Lead; D003300:Copper; D000535:Aluminum; D007501:Iron