Ultramorphological and physiological modifications induced by high zinc levels in Paulownia tomentosa

Azzarello, Elisa; Pandolfi, Camilla; Giordano, Cristiana; Rossi, Marika; Mugnai, S.; Mancuso, Stefano

doi:10.1016/j.envexpbot.2012.02.008

Cited by 46 publications

(31 citation statements)

References 40 publications

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“…Whether the dark floccules and particles were Zn or not should be proved in the future. From the electron micrographs obtained by TEM, it was evident that the cell walls were thicker and some mitochondria were swollen, darkened, and deformed as compared to those of the control; the observations were consistent with those of Sedum alfredii Hance (Jin et al 2008) and Paulownia tomentosa (Azzarello et al 2012).…”

Section: Discussionsupporting

confidence: 81%

Effect of Zn toxicity on root morphology, ultrastructure, and the ability to accumulate Zn in Moso bamboo (Phyllostachys pubescens)

Liu

Chen

Mahmood

et al. 2014

Environ Sci Pollut Res

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The effects of zinc (Zn) on seed germination and growth of Moso bamboo (Phyllostachys pubescens) were investigated. Under zinc stress, the seed germination rate did not show significant difference from that of the control. Hydroponics experiments indicated that Moso bamboo had a strong ability to accumulate Zn in the shoot and it reached its maximum value in the shoot at 100 μM Zn. The root Zn concentration ranged from 2,329.29 to 8,642.51 mg kg(-1), with the root Zn concentration at 10 μM Zn being 58.23 times that of the control. The root morphology parameters slightly increased at the lower Zn treatments, while growth restriction was evident at higher Zn treatments. Root ultrastructural studies revealed that the cell structure, root tips, and organelles were significantly changed under Zn stress as compared to those of the control. Some abnormalities were evident in the cell walls, vacuoles, mitochondria, plasmalemma, tonoplast, and xylem parenchyma of root cells. While Moso bamboo seems a suitable candidate for phytoremediation, its metal remediation ability should be further explored in future investigations.

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Section: Discussionsupporting

confidence: 81%

Effect of Zn toxicity on root morphology, ultrastructure, and the ability to accumulate Zn in Moso bamboo (Phyllostachys pubescens)

Liu

Chen

Mahmood

et al. 2014

Environ Sci Pollut Res

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“…We found that chloroplasts of Zn treated mesophyll cells contained significantly more plastoglobuli and thylakoids with only limited number of grana, when compared with control leaf cells. Similar Zn-induced changes in leaf ultrastructure were documented by Azzarello et al (2012) in Paulownia tomentosa and by Hermle et al (2007) in poplar Populus tremula and willow Salix viminalis. Todeschini et al (2011) found that Zn reduced number and area of starch grains in chloroplasts of poplar Populus alba clone Villafranca.…”

Section: Discussionsupporting

confidence: 71%

Anatomical, biochemical and morphological responses of poplar Populus deltoides clone Lux to Zn excess

Stoláriková-Vaculíková

Romeo

Minnocci

et al. 2015

Environmental and Experimental Botany

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“…Similar Zn‐rich vesicular structures have also been shown in the root hairs of excessively Zn‐treated Paulownia tomentosa (Azzarello et al . ). Future work will show whether plant cells possess ‘zincosomes’ or Zn‐specialized vacuoles with transporters like MTP1 (Kawachi et al .…”

Section: Hm‐induced Alterations In Vacuolar Form and Dimensionsmentioning

confidence: 99%

Vacuolar compartmentalization as indispensable component of heavy metal detoxification in plants

Sharma

Dietz

Mimura

2016

Plant Cell & Environment

390

157

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Plant cells orchestrate an array of molecular mechanisms for maintaining plasmatic concentrations of essential heavy metal (HM) ions, for example, iron, zinc and copper, within the optimal functional range. In parallel, concentrations of non-essential HMs and metalloids, for example, cadmium, mercury and arsenic, should be kept below their toxicity threshold levels. Vacuolar compartmentalization is central to HM homeostasis. It depends on two vacuolar pumps (V-ATPase and V-PPase) and a set of tonoplast transporters, which are directly driven by proton motive force, and primary ATP-dependent pumps. While HM non-hyperaccumulator plants largely sequester toxic HMs in root vacuoles, HM hyperaccumulators usually sequester them in leaf cell vacuoles following efficient long-distance translocation. The distinct strategies evolved as a consequence of organ-specific differences particularly in vacuolar transporters and in addition to distinct features in long-distance transport. Recent molecular and functional characterization of tonoplast HM transporters has advanced our understanding of their contribution to HM homeostasis, tolerance and hyperaccumulation. Another important part of the dynamic vacuolar sequestration syndrome involves enhanced vacuolation. It involves vesicular trafficking in HM detoxification. The present review provides an updated account of molecular aspects that contribute to the vacuolar compartmentalization of HMs.

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Ultramorphological and physiological modifications induced by high zinc levels in Paulownia tomentosa

Cited by 46 publications

References 40 publications

Effect of Zn toxicity on root morphology, ultrastructure, and the ability to accumulate Zn in Moso bamboo (Phyllostachys pubescens)

Effect of Zn toxicity on root morphology, ultrastructure, and the ability to accumulate Zn in Moso bamboo (Phyllostachys pubescens)

Anatomical, biochemical and morphological responses of poplar Populus deltoides clone Lux to Zn excess

Vacuolar compartmentalization as indispensable component of heavy metal detoxification in plants

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