Gas-exchange, photo- and antioxidant protection, and metal accumulation in I-214 and Eridano Populus sp. clones subjected to elevated zinc concentrations

Fernàndez-Martínez, Jordi; Zacchini, Massimo; Fernández‐Marín, Beatriz; Garcı́a-Plazaola, José Ignacio; Fleck, Isabel

doi:10.1016/j.envexpbot.2014.06.004

Cited by 24 publications

(20 citation statements)

References 52 publications

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“…Both metals were in fact accumulated in plant biomass at relatively high concentrations (112.6 ± 17.8 mg and 82.8 ± 19.3 mg for Zn and Pb, respectively) in respect to those reported for other species under similar metal doses (Di Baccio et al, 2009;Caldelas et al, 2012;Fernàndez-Martínez et al, 2014). Moreover, translocation factor was less than unity (TF <1) for both treatments, and was especially low for the highly toxic Pb, in agreement with the fact that the accumulation of metals occurred mostly in rhizomes and roots, as a metal exclusion strategy (Ahmad et al, 2014).…”

Section: Discussionmentioning

confidence: 56%

“…In our study, a significant reduction of gas exchanges in the Zn treated plants can be attributable mainly to stomatal limitation due to Zn (Sagardoy et al 2010;Caldelas et al 2012;Fernàndez, Zacchini and Fleck 2012;Fernàndez et al 2014), since no increase in Ci was measured. This inhibition of stomatal conductance could be either due to a direct effect of Zn in the leaves, or to an indirect ABA-dependent mechanism due to the toxic effects of this metal on the roots (Disante, Fuentes, and Cortina 2011).…”

Section: Discussionmentioning

confidence: 66%

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Effects of high Zn and Pb concentrations onPhragmites australis(Cav.) Trin. Ex. Steudel: Photosynthetic performance and metal accumulation capacity under controlled conditions

Bernardini

Salvatori

Guerrini

et al. 2015

International Journal of Phytoremediation

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The response of Phragmites australis (Cav.) Trin. Ex. Steudel to zinc (Zn) and lead (Pb) was studied separately in two hydroponic tests, during a three weeks experiment. The effects on ecophysiology and biomass partitioning were evaluated during the metal treatments and at the recovery, and total metal content and accumulation capacity in different plant organs were assessed. Zn and Pb had different effects on the overall measured parameters, highlighting different mechanism of action. In particular, Zn concentration was higher in roots and, being a micronutrient, it was translocated into leaves, producing a reduction of assimilation rate, stomatal conductance (-71.9 and -81.3% respect to the control plant respectively), and a strong down regulation of photosystems functionality both at PSII and PSI level. Otherwise, Pb was accumulated mainly in the more lignified tissue such as rhizomes, with slightly effect on gas exchange. Chlorophyll a fluorescence highlighted that Pb inhibits the electron transfer process at the PSI donor side, without recovery after the removal of the metal stress. Despite these physiological limitations, P. australis showed a high capacity to accumulate both metals, and only slight reduction of biomass, being therefore a suitable species for phytoremediation interventions.

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Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 66%

Effects of high Zn and Pb concentrations onPhragmites australis(Cav.) Trin. Ex. Steudel: Photosynthetic performance and metal accumulation capacity under controlled conditions

Bernardini

Salvatori

Guerrini

et al. 2015

International Journal of Phytoremediation

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“…Zinc can activate several antioxidant enzymes, such as SOD, POD, and CAT (Jat et al 2007, Saeed et al 2013. Fernàndez-Martínez et al (2014) showed that plant photoprotection and antioxidant capacity increase with increasing Zn concentration; however, high concentrations of Zn produce high toxicity, which can reduce crop biomass, decrease photosynthetic pigment content, and damage the photochemical processes and photosynthesis. Mateos-Naranjo et al (2014) showed that a suitable amount of Zn (30 mmol L −1 ) can increase the total biomass, relative growth rate, and photosynthetic pigment content of Juncus acutus, but high concentrations of Zn (> 60 mmol L −1 ) inhibit plant growth, reduce its growth rate and photosynthetic pigment content, and affect the chlorophyll fluorescence characteristics.…”

Section: Discussionmentioning

confidence: 99%

Effects of exogenous zinc on the photosynthesis and carbonic anhydrase activity of millet (Setaria italica L.)

Cao¹,

Li²,

Du³

2020

Photosynt.

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This study aimed to evaluate the effects of Zn on the growth safety and activity of carbonic anhydrase (CA) in foxtail millet (Setaria italica L.). The photosynthetic characteristics, CA activity, and relative gene expression of different varieties of millet at the seedling stage were studied by spraying Zn solution under pot experiment and indoor culture conditions. Results showed that spraying low-concentration Zn solution (20, 40, and 60 mg L −1) reduced malondialdehyde content and intercellular CO2 concentration (Ci) but increased antioxidant enzyme activity, pigment content, and photosynthetic gas-exchange parameters (net photosynthetic rate, stomatal conductance, transpiration rate, except for Ci); meanwhile, spraying high Zn concentration (80 and 100 mg L −1) exerted opposite effects. The optimal growth of millet was achieved when the Zn concentration was 40 mg L −1. At this concentration, CA activity increased and β-CA family expression was upregulated, which exerted little or no effect on other CA families. Compared to Zhangzagu 10 (zinc-resistant variety), Jingu 21 (zinc-sensitive variety) showed a more significant change. This study may serve as a reference for further research on the function of CA and physiological processes, such as photosynthesis in millet, and a theoretical basis for the effective use of Zn fertilizer in millet.

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“…cell suspension cultures (Cetin et al 2014) to Cd as well as Eridano Populus sp. clones to elevated Zn concentrations (Fern andez-Martínez et al 2014). It has been shown that oxidative stress activates the expression of genes responsible for the synthesis of tocopherols in higher plants (Tang et al 2011).…”

Section: Tocopherols and Tocotrienolsmentioning

confidence: 99%

Heavy Metal-Induced Oxidative Stress in Plants: Response of the Antioxidative System

Štolfa

Pfeiffer

Špoljarić

et al. 2015

Reactive Oxygen Species and Oxidative Damage in Plants Under Stress

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Gas-exchange, photo- and antioxidant protection, and metal accumulation in I-214 and Eridano Populus sp. clones subjected to elevated zinc concentrations

Cited by 24 publications

References 52 publications

Effects of high Zn and Pb concentrations onPhragmites australis(Cav.) Trin. Ex. Steudel: Photosynthetic performance and metal accumulation capacity under controlled conditions

Effects of high Zn and Pb concentrations onPhragmites australis(Cav.) Trin. Ex. Steudel: Photosynthetic performance and metal accumulation capacity under controlled conditions

Effects of exogenous zinc on the photosynthesis and carbonic anhydrase activity of millet (Setaria italica L.)

Heavy Metal-Induced Oxidative Stress in Plants: Response of the Antioxidative System

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