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1 June 2009 Root Ultrastructure of Senecio coronatus Genotypes Differing in Ni Uptake
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Abstract

Root ultrastructure and histochemistry of Ni-hyperaccumulating and non-hyperaccumulating genotypes of Senecio coronatus were compared using transmission electron and light microscopy. Distinct groups of inner cortical cells in the Ni-hyperaccumulator had an organelle-rich cytoplasm, while indistinct groups of these cells in the non-hyperaccumulator had few organelles. The inner cortical-cell groups and adjacent endodermis in both genotypes appeared to be sites for the synthesis of an alkaloid which was produced more abundantly in the Ni-hyperaccumulator. Casparian bands in exodermal cells were better defined in the non-hyperaccumulator, suggesting a more efficient barrier for exclusion of Ni. Results are discussed in relation to the differential uptake of Ni by the genotypes and ultrastructural aspects of alkaloid production.

Jolanta Mesjasz-Przybyłowicz, Alban Barnabas, and Wojciech Przybyłowicz "Root Ultrastructure of Senecio coronatus Genotypes Differing in Ni Uptake," Northeastern Naturalist 16(sp5), 351-365, (1 June 2009). https://doi.org/10.1656/045.016.0526
Published: 1 June 2009
JOURNAL ARTICLE
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