Element distribution in mycorrhizal and nonmycorrhizal roots of the halophyte Aster tripolium determined by proton induced X-ray emission

Protoplasma
S ScheloskeB Povh

Abstract

The salt aster (Aster tripolium L.) colonized by the arbuscular mycorrhizal fungus Glomus intraradices Sy167 and noncolonized control plants were grown in a greenhouse for nine months with regular fertilization by Hoagland nutrient solution supplemented with 2% NaCl. Mycorrhizal roots showed a high degree of mycorrhizal colonization of 60-70% and formed approximately 25% more dry weight and much less aerenchyma than the nonmycorrhizal controls. Cryosectioning essentially preserved the root cell structures and apparently did not cause significant ion movements within the roots during cuttings. The experimental conditions, however, did not allow to discriminate between fungal and plant structures within the roots. Quantification of proton-induced X-ray emission (PIXE) data revealed that in control roots, Na(+) was mainly concentrated in the outer epidermal and exodermal cells, whereas the Cl(-) concentration was about the same in all cells of the roots. Cross sections of roots colonized by the mycorrhizal fungus did not show this Na(+) gradient in the concentration from outside to inside but contained a much higher percentage of NaCl among the elements determined than the controls. PIXE images are also presented for the four othe...Continue Reading

Citations

May 26, 2010·Mycorrhiza·Edith C HammerHåkan Wallander
Mar 5, 2013·The Journal of Microbiology·Zhongqun He, Zhi Huang
Aug 5, 2010·Journal of Agricultural and Food Chemistry·Bharathi AvulaIkhlas A Khan
Aug 19, 2015·Frontiers in Plant Science·Asha KumariPradeep K Agarwal
Aug 8, 2014·Frontiers in Plant Science·Kevin Garcia, Sabine D Zimmermann
Nov 5, 2014·Frontiers in Plant Science·Robert M AugéArnold M Saxton
Jul 1, 2016·Functional Plant Biology : FPB·Oren ShelefShimon Rachmilevitch
Mar 27, 2018·Plant, Cell & Environment·Tania Galindo-CastañedaJonathan P Lynch

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