Acclimation of poplar trees to heavy metals in polluted habitats: I. Carbohydrate metabolism in fine roots of Populus deltoides

• Autorzy: Lorenc-Plucinska G. , Stobrawa K.
• Języki publikacji: EN

Abstrakty

EN

Concentrations of total nonstructural carbohydrates (TNC), soluble carbohydrates, starch, sucrose, glucose, fructose, raffinose, galactose, stachyose, mannitol and specific activities of soluble acid (AI) and neutral (NI) invertases, sucrose synthase (SuSy), hexokinase (HK), fructokinase (FK), glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and glucose 6-phosphate dehydrogenase (G6PDH) were analyzed in fine roots of Populus deltoides Bartr. ex Marsh growing at a polluted site (near copper smelters) and a control site (free from heavy pollution). Also chemical properties of the soil from both sites were assessed. In comparison with the control, fine roots from the polluted site contained greater concentrations of TNC, soluble sugars, starch and sucrose but less hexoses, so they had higher values of sucrolysis index (sucrose/hexoses). The activity of AI, NI and SuSy declined insignificantly, while specific activities of HK, FK, GAPDH and G6PDH were significantly inhibited. The results suggest that a long-term heavy metal stress leads to an accumulation of carbohydrates and altering activities of glycolysis and the oxidative pentose phosphate pathway in fine roots.

Słowa kluczowe

EN

glucose; fructokinase; fructose; glycolysis; glyceraldehyde 3-phosphate dehydrogenase; non-structural carbohydrate; carbohydrate; hexokinase; galactose; soluble carbohydrate; polluted habitat; root; poplar tree; stachyose; sucrose; starch; Populus deltoides; concentration; sugar; raffinose; glucose 6-phosphate dehydrogenase; heavy metal

• Wydawca: -
• Czasopismo: Acta Societatis Botanicorum Poloniae
• Rocznik: 2005
• Tom: 74
• Numer: 1
• Opis fizyczny: p.11-16,ref.

Twórcy

autor

Lorenc-Plucinska G.

• Polish Academy of Sciences, Parkowa 5, 62-035 Kornik, Poland

autor

Stobrawa K.