Accumulation and distribution of zinc in the leaves and roots of the hyperaccumulator Noccaea caerulescens

Dinh, Ngoc; Vu, Dang; Nguyen, Anh V.

doi:10.1016/j.envexpbot.2014.10.001

Cited by 44 publications

(51 citation statements)

References 30 publications

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“…Zn/Cd hyperaccumulator species Noccaea caerulescens (DINH et al, 2015). The C and O relative concentrations in specialized A. angustifolia needle tissues followed this descending order: adaxial epidermis> abaxial epidermis> mesophyll palisade> spongy mesophyll and, spongy mesophyll> abaxial epidermis>mesophyll palisade>adaxial epidermis, respectively (Figure 3a, b).…”

Section: Elemental Distribution In Epidemis and Mesophyllmentioning

confidence: 91%

“…Advanced microscopy and spectroscopy techniques have allowed for a more comprehensive assessment of the elemental composition of plant tissues (DINH et al, 2015;KRIEGER et al, 2017). In the evaluation of elemental accumulation, studies have concentrated on the elemental distribution in different tissues and plant cells (CONN; GILLIHAM, 2010) including crystals (HE et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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SOIL FERTILITY AFFECTS ELEMENTAL DISTRIBUTION IN NEEDLES OF THE CONIFER Araucaria angustifolia: A MICROANALYTICAL STUDY

Barbosa

Constantino

Zanette

et al. 2017

CERNE

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Araucaria angustifolia is a conifer species found in South American subtropical forests that comprises less than 3% of the native vegetation and little is known concerning the accumulation of nutritional elements in its needles. In this study, scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) was used to assess the elemental distribution in needles. Needles were selected from 28 month-old plants grown in a fertilization experiment supplied with: 1) N, P, and K; 2) N and P; and 3) N and K. In microanalysis, four types of specialized needle tissues (adaxial epidermis, palisade mesophyll, spongy mesophyll and abaxial epidermis) were evaluated for elemental composition (C, O, P, K, Ca, S and Al). When crystals were detected, the concentrations of 12 elements were determined (C, O, P, K, Ca, S, Al, Fe, Mg, Na, Si, and Cl). Under low soil P and K, these elements were found in low concentrations in the epidermis, mesophyll, and crystals. Under low soil P, Ca and K accumulated in the spongy mesophyll, while under low soil K only Ca accumulated in this tissue. In addition, low soil P or K availability favored the formation of crystals; crystals under low soil K availability had more Ca and Mg. Soil P and K availability affected the distribution of elements in needles of A. angustifolia, in that type of tissue and formation of crystals were key to the nutrient dynamics in needles.

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Section: Elemental Distribution In Epidemis and Mesophyllmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

SOIL FERTILITY AFFECTS ELEMENTAL DISTRIBUTION IN NEEDLES OF THE CONIFER Araucaria angustifolia: A MICROANALYTICAL STUDY

Barbosa

Constantino

Zanette

et al. 2017

CERNE

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“…Other studies reveal that an increasing Zn concentration may reduce the uptake of other elements such as Mn (Lombi et al, 2001;Foroughi et al, 2014) and P (Zhao et al, 1998 The preliminary results for N. caerulescens (Dinh et al, 2015) showed that Ca and Zn co-localize in the leaf tissues, but uptake of Ca was reduced up to 50% by increasing concentrations of Zn.…”

Section: Introductionmentioning

confidence: 89%

“…The seeds were then germinated on wet filter papers in the dark in a temperature-controlled glasshouse (22±3 °C) for 7 days (Dinh et al, 2015). One week-old uniform seedlings were transplanted into foam strips to keep the plants in direct contact with a basal nutrient solution made up of the following (in μM) (Monsant et al, 2010) applied to the hydroponics 12 weeks after the seedlings were transferred to the pots.…”

Section: Plant Growthmentioning

confidence: 99%

“…In a previous study on N. caerulescens, (Dinh et al, 2015) focused on assessing the capacity of Zn uptake and tolerance by N. caerulescens and to benchmark the results relative to the non-hyperaccumulator T. arvense. That study also elucidated the Zn detoxification mechanisms of N. caerulescens through characterization of Zn distribution in the plant tissues.…”

Section: Introductionmentioning

confidence: 99%

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Phytoextraction of zinc by the hyperaccumulator Noccaea caerulescens: accumulation, distribution and multi-element interactions

Dinh¹

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Phytoextraction involves the removal of heavy metals from contaminated sites using hyperaccumulators such as Noccaea caerulescens F.K.Meyer (formerly Thlaspi caerulescens) which is a well-known Zn hyperaccumulator and a model species for hyperaccumulator studies.This PhD thesis investigates the zinc response of the hyperaccumulator in terms of accumulation, distribution and multi-element interactions. The impact of Zn, Pb and Cu on the growth, Zn accumulation and distribution, and interaction between the metals and between the metals and other plant nutrients were examined in soution culture to provide insights into the physiological and biochemical mechanisms of metal hyperaccumulation and detoxification.Noccaea caerulescens were treated with a range of Zn concentrations to investigate uptake, tolerance and distribution of Zn, and these were compared with the responses in a related nonhyperaccumulator, Thlaspi arvense. Noccaea caerulescens showed a high Zn requirement for growth and a higher Zn accumulation and tolerance, with in excess of 2.5 % Zn in the shoot dry mass occurring without visible toxicity symptoms. Thlaspi arvense displayed Zn toxicity symptoms within two weeks of comparable Zn treatment. Increasing shoot Zn concentrations in N.caerulescens reduced Ca and P concentrations by up to 50% and 35%, respectively. Scanning electron microscopy with energy-dispersive X-ray (SEM-EDS) showed that Zn-containing crystals were abundant in leaf epidermal cells and the cortex of the roots during the later growth phase of N. caerulescens.The impact of Pb and Cu on Zn phytoextraction in N. caerulescens was investigated and these metals in solution were found to inhibit both growth and Zn accumulation when present in combination with Zn. Plants were more sensitive to Cu than Pb with Cu being more readily transported to the shoots while almost all Pb was retained in the roots. Concentrations of other essential nutrients such as Ca, Mg, P, S, Fe, and K were decreased in shoots but increased in roots when there was a prolonged period of metal exposure. Higher levels of Zn accumulation decreased the concentrations of Ca, Mg, S and Fe in shoots. Sub-cellular elemental localization analysis using SEM-EDS revealed that Zn accumulated primarily inside the vacuoles of leaf epidermal cells. Znrich crystals were observed in the SEM freeze-dried leaf samples of the control and the Zn plus Pb treatment after extended exposure, but no crystals were found in the cryo-SEM leaf samples.Copper and Pb were not detected in the Zn-rich crystals of the freeze-dried samples or the cryo-SEM samples.ii A fluorescent probe technique was developed and applied to investigate the distribution of Zn ion in fresh plant tissues. Noccaea caerulescens was found to have not only a high capacity for Zn accumulation, but also a high tolerance to Pb. Both these characteristics were more prominent in younger plants. Zinc in combination with Pb had less impact on plant growth than Zn alone. In this thesis, a number of novel techniques were succe...

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Spatial distribution of structural elements in leaves of Ilex paraguariensis: physiological and ecological implications

Barbosa¹,

Motta

Reis

et al. 2019

Trees

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Accumulation and distribution of zinc in the leaves and roots of the hyperaccumulator Noccaea caerulescens

Cited by 44 publications

References 30 publications

SOIL FERTILITY AFFECTS ELEMENTAL DISTRIBUTION IN NEEDLES OF THE CONIFER Araucaria angustifolia: A MICROANALYTICAL STUDY

SOIL FERTILITY AFFECTS ELEMENTAL DISTRIBUTION IN NEEDLES OF THE CONIFER Araucaria angustifolia: A MICROANALYTICAL STUDY

Phytoextraction of zinc by the hyperaccumulator Noccaea caerulescens: accumulation, distribution and multi-element interactions

Spatial distribution of structural elements in leaves of Ilex paraguariensis: physiological and ecological implications

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