Root anatomy and element distribution vary between two Salix caprea isolates with different Cd accumulation capacities.
The understanding of the influence of toxic elements on root anatomy and element distribution is still limited. This study describes anatomical responses, metal accumulation and element distribution of rooted cuttings of Salix caprea after exposure to Cd and/or Zn. Differences in the development of apoplastic barriers and tissue organization in roots between two distinct S. caprea isolates with divergent Cd uptake and accumulation capacities in leaves might reflect an adaptive predisposition based on different natural origins. Energy-dispersive X-ray spectroscopy (EDX) revealed that Cd and Zn interfered with the distribution of elements in a tissue- and isolate-specific manner. Zinc, Ca, Mg, Na and Si were enriched in the peripheral bark, K and S in the phloem and Cd in both vascular tissues. Si levels were lower in the superior Cd translocator. Since the cuttings originated from stocks isolated from polluted and unpolluted sites we probably uncovered different strategies against toxic elements.
Department of Applied Genetics and Cell Biology, BOKU - University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria.
Marek
M
Vaculík
Cornelia
C
Konlechner
Ingrid
I
Langer
Wolfram
W
Adlassnig
Markus
M
Puschenreiter
Alexander
A
Lux
Marie-Theres
MT
Hauser
D001673:Biodegradation, Environmental; D002104:Cadmium / Q000378:metabolism* / Q000633:toxicity; D018517:Plant Roots / Q000033:anatomy & histology / Q000187:drug effects / Q000378:metabolism*; D032108:Salix / Q000033:anatomy & histology / Q000187:drug effects / Q000378:metabolism*; D012989:Soil Pollutants / Q000378:metabolism* / Q000633:toxicity; D015032:Zinc / Q000378:metabolism / Q000633:toxicity
D012989:Soil Pollutants; D002104:Cadmium; D015032:Zinc