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Liečivé rastliny v meniacich sa environmentálnych podmienkach

Liečivé rastliny v meniacich sa environmentálnych podmienkach

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Vliv biotických a abiotických stresorů na vlastnosti rostlin 11.5.2005<br />

Vzdialenosť Casparyho pásika od<br />

apexu (µm)<br />

14000<br />

12000<br />

10000<br />

8000<br />

6000<br />

4000<br />

2000<br />

0<br />

0 1 10 0 1 10 0 1 10<br />

2. 6. 10.<br />

Koncentrácia Cd(NO3)2.4 H2O + čas odberu (dni)<br />

seminálny koreň<br />

laterálny koreň<br />

Obr. 1 Vzdialenosť zakladania <strong>sa</strong> Casparyho pásikov od apexu v seminálnych a laterálnych<br />

koreňoch v závislosti od koncentrácie Cd(NO 3 ) 2 .4H 2 O (0, 1, 10 µM) v médiu a čase kultivácie.<br />

Použitá literatúra<br />

(1) PRÁT, S. & KOMÁREK, K. 1934. Vegetácia u mědených dolů. Sborník Ma<strong>sa</strong>rykovy<br />

Akademie Práce 8: 1-16.<br />

(2) SCHREIBER, L., HARTMANN, K., SKRABS, M. & ZEIER, J. 1999. Apoplastic barriers in<br />

roots: chemical composition of endodermal and hypodermal cell walls. J. Exp. Bot. 337: 1267-<br />

1280.<br />

(4) UETAKE, Y., IKEDA, A., KONDO, F. & KARAHARA, I. 2001. Radial widening of the<br />

Casparian strip in primary roots of maize under <strong>sa</strong>lt stress. The 6th Symposium of the International<br />

Society of root Research, 11.-15. November 2001, Nagoya, Japan.<br />

(3) VON GUTTENBERG, H. 1968. Der primäre Bau der Angiospermenwurzel.<br />

Handbuch der Pflanzenanatomie. Gebrüder Borntraegern – Berlin – Stuttgart, 472 pp.<br />

Summary<br />

Cadmium is a toxic metal, its presence in substrate induces changes in lignification and<br />

suberinization of endodermal cell walls in seminal and lateral roots in plants of Silene dioica L.<br />

These changes are evident according to the distances of Casparian band – one of barriers preventing<br />

apoplastic cadmium transport - formation from the apex of seminal and lateral roots. With<br />

increasing cadmium concentration decreases examined distance and with time prolongation of<br />

cadmium treatment the differences between variants are more evident. Casparian bands develop in<br />

lateral roots closer to the root apex and react to presence of cadmium in substrate more sensitive<br />

than in seminal roots.<br />

Poďakovanie<br />

Táto práca bola finančne podporená z grantov 1/0100/03 zo slovenskej grantovej agentúry VEGA<br />

a projektu EÚ COST Action 837.<br />

210

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