Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: stoma index

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Effect of zinc and copper soil contamination on the transpiration intensity and stomal index of winter crop wheat seedlings

100%

Stolarska A., Wrobel J., Wozniak A., Marska B.

Journal of Elementology

2007

tom 12

nr 1

In the study, the physiological response of wheat plants to the effect of metal salts was examined by measuring gaseous exchange transpiration parameters, such as transpiration intensity, stomatal conductivity and stomata count per 1 mm2 of the leaf under- and upperside. The study was carried out using the gley soil [black earth] of granulometric composition of loam collected from the plough-humus horizon of 0-10 cm depth. The soil was contaminated with different pollutant doses, i.e. 0 (control), 0.05, 0.5, 5 and 50 mmol·kg-1. Each combination was seeded with 10 wheat grains. Two-factor analysis of variance was used, with the type of applied salt (ZnSO4 and CuSO4) being the first factor and its dose the second one. The significance of factors was examined with Tukey's test (p<0.05). A delayed germination of seeds was observed in relation to the control in soil samples contaminated with 5 mmol·kg-1 (both salts). The seedlings examined showed large differentiation in their response to Zn and Cu; in the case of CuSO4, transpiration was much lower than under the effect of ZnSO4. The transpiration intensity was the lowest after application of copper salts in a concentration of 5 and 50 mmol-kg1, whereas the highest one was observed in zinc concentration of 5 mmol·kg-1. The soil contamination with a dose of 0.05 and 50 mmol·kg-1 resulted in a significant decrease of stomatal conductivity in relation to the control. The examined heavy metals significantly affected the stomatal count only on the leaf underside, where it increased at the highest concentration of heavy metals, i.e. 50 mmol·kg-1.

Ograniczanie wyników

1 Journal of Elementology

1 Marska B.

1 Stolarska A.

1 Wozniak A.

1 Wrobel J.

1 2007

Wyniki wyszukiwania

Effect of zinc and copper soil contamination on the transpiration intensity and stomal index of winter crop wheat seedlings