Impact of moderate Fe excess under Cd stress on the photosynthetic performance of poplar (Populus jacquemontiana var. glauca cv. Kopeczkii)

Sárvári, Éva; Solti, Ádám; Basa, Brigitta; Mészáros, Ilona; Lévai, László; Fodor, Ferenc

doi:10.1016/j.plaphy.2011.02.012

Cited by 19 publications

(10 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Re-distribution of leaf Fe, and its allocation to the chloroplasts in particular, promote the recovery of photosynthetic structures and activity, which, in fact, also contributes to the requirement of the antioxidative defence for reductants. Thus, it allows increasing Cd tolerance of poplar by elevating Fe supply [22] and/or by overexpressing antioxidant [52] or ROS-scavenging enzymes [53,54].…”

Section: Resultsmentioning

confidence: 99%

“…Non-solubilised material (starch) was removed by centrifugation at 10,000 × g for 5 min. As described in Sárvári et al [22], the iron content of solubilised chloroplast material was measured photometrically in form of the [Fe(BPDS) 3 ] 4-complex at 535 nm in a UV-VIS spectrophotometer (Shimadzu, Kyoto, Japan) after the addition of 100 μM ascorbic acid to reduce the total iron content of the samples to Fe 2+ and 300 μM bathophenanthroline …”

Section: Determination Of Element Concentrationsmentioning

confidence: 99%

“…From the point of view of both damage to and hardening of photosynthesis, the most important event is the Cd induced Fe deficiency in leaves [3,4] which is also manifested in the chloroplasts [22]. In fact, the translocation of Fe from roots to the shoots was negligible during the entire experimental period.…”

Section: Metal Re-distribution and Hardeningmentioning

confidence: 99%

See 2 more Smart Citations

Stress hardening under long-term cadmium treatment is correlated with the activation of antioxidative defence and iron acquisition of chloroplasts in Populus

Solti

Sárvári

Szöllősi

et al. 2016

Zeitschrift Für Naturforschung C

Self Cite

View full text Add to dashboard Cite

Cadmium (Cd), a highly toxic heavy metal affects growth and metabolic pathways in plants, including photosynthesis. Though Cd is a transition metal with no redox capacity, it generates reactive oxygen species (ROS) indirectly and causes oxidative stress. Nevertheless, the mechanisms involved in long-term Cd tolerance of poplar, candidate for Cd phytoremediation, are not well known. Hydroponically cultured poplar (Populus jacquemontiana var. glauca cv. 'Kopeczkii') plants were treated with 10 μM Cd for 4 weeks. Following a period of functional decline, the plants performed acclimation to the Cd induced oxidative stress as indicated by the decreased leaf malondialdehyde (MDA) content and the recovery of most photosynthetic parameters. The increased activity of peroxidases (PODs) could have a great impact on the elimination of hydrogen peroxide, and thus the recovery of photosynthesis, while the function of superoxide dismutase (SOD) isoforms seemed to be less important. Re-distribution of the iron content of leaf mesophyll cells into the chloroplasts contributed to the biosynthesis of the photosynthetic apparatus and some antioxidative enzymes. The delayed increase in photosynthetic activity in relation to the decline in the level of lipid peroxidation indicates that elimination of oxidative stress damage by acclimation mechanisms is required for the restoration of the photosynthetic apparatus during long-term Cd treatment.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Determination Of Element Concentrationsmentioning

confidence: 99%

See 1 more Smart Citation

Stress hardening under long-term cadmium treatment is correlated with the activation of antioxidative defence and iron acquisition of chloroplasts in Populus

Solti

Sárvári

Szöllősi

et al. 2016

Zeitschrift Für Naturforschung C

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since Fe deficiency affects the photosynthetic activity, it also reduces the crop yield (Wu et al 2010). In contrast, slight excess of Fe does not cause significant alterations in the composition and function of the photosynthetic apparatus (Sárvári et al 2011). Non-complexed Fe ions can be highly toxic for plants.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

The developmental and iron nutritional pattern of PIC1 and NiCo does not support their interdependent and exclusive collaboration in chloroplast iron transport in Brassica napus

Pham

Pólya

Müller

et al. 2020

Planta

Self Cite

View full text Add to dashboard Cite

Main conclusion The accumulation of NiCo following the termination of the accumulation of iron in chloroplast suggests that NiCo is not solely involved in iron uptake processes of chloroplasts.Abstract Chloroplast iron (Fe) uptake is thought to be operated by a complex containing permease in chloroplast 1 (PIC1) and nickel-cobalt transporter (NiCo) proteins, whereas the role of other Fe homeostasis-related transporters such as multiple antibiotic resistance protein 1 (MAR1) is less characterized. Although pieces of information exist on the regulation of chloroplast Fe uptake, including the effect of plant Fe homeostasis, the whole system has not been revealed in detail yet. Thus, we aimed to follow leaf development-scale changes in the chloroplast Fe uptake components PIC1, NiCo and MAR1 under deficient, optimal and supraoptimal Fe nutrition using Brassica napus as model. Fe deficiency decreased both the photosynthetic activity and the Fe content of plastids. Supraoptimal Fe nutrition caused neither Fe accumulation in chloroplasts nor any toxic effects, thus only fully saturated the need for Fe in the leaves. In parallel with the increasing Fe supply of plants and ageing of the leaves, the expression of BnPIC1 was tendentiously repressed. Though transcript and protein amount of BnNiCo tendentiously increased during leaf development, it was even markedly upregulated in ageing leaves. The relative transcript amount of BnMAR1 increased mainly in ageing leaves facing Fe deficiency. Taken together chloroplast physiology, Fe content and transcript amount data, the exclusive participation of NiCo in the chloroplast Fe uptake is not supported. Saturation of the Fe requirement of chloroplasts seems to be linked to the delay of decomposing the photosynthetic apparatus and keeping chloroplast Fe homeostasis in a rather constant status together with a supressed Fe uptake machinery.

show abstract

“…However, there are evidences that interaction of Fe with other nutrients is more important than Fe deficiency per se, since the Fe concentration was not changed or even increased in some plant species after Cd exposure (Root et al, 1975;Larbi et al, 2002;Lopéz-Millán et al, 2009;. When Fe concentration is the same in Cd-treated and non-treated plants, at least two events must be taken into consideration: (1) "dilution and concentration effects" on Fe concentration by changing the concentration of other nutrients and/or by altering the cell growth, and (2) modifications in the Fe distribution in sub-cellular compartments, which can play a key role in the protective effect against Cd exposure (Sárvári et al, 2011).…”

Section: Low Fe Concentrations In Leaves Are Uncoupled To the Highestmentioning

confidence: 99%

Integrated approach of anatomical, physiological and biochemical parameters for the study of tolerance mechanisms to cadmium in tomato accessions

Carvalho¹

View full text Add to dashboard Cite

Integrated approach of anatomical, physiological and biochemical parameters for the study of tolerance mechanisms to cadmium in tomato accessions Tomato (Solanum lycopersicum L.) consumption has increased every year due to the fruit attractiveness, several utilizations, and beneficial effects for human health. However, tomato fruits can accumulate a Cd concentration that exceeds the safety threshold for human consumption of vegetables, even when plants are grown in soil with acceptable Cd level. Cd is a non-essential, hazardous element to biological systems, triggering several diseases in humans. In plants, Cd disturbs the antioxidant machinery, changes the nutritional status, and impairs the photoassimilate production and/or partitioning, hence reducing fruit yield and quality. However, distinct tomato accessions can present contrasting tolerance degree to Cd toxicity, as detected by our group in previous studies. The use of these accessions is a powerful approach to identify strategies employed by plants to cope with Cdinduced challenges, and the acknowledgement of such strategies can be potentially used in breeding and biotechnological programs to improve fruit yield and quality in crops that were cultivated in contaminated fields. The set of studies that compose the present thesis aimed (i) to identify the main mechanisms for the contrasting tolerance degree to Cd-induced toxicity in tomato accessions after short and long-term Cd exposure; (ii) to evaluate the relationship among tolerance degree and fruits attributes in plants that were grown in Cd-containing soil, and (iii) to determine the transgenerational effects of Cd-induced stress. In the first experiment, nine tomato accessions with a varied tolerance degree, which was based on biomass accumulation, to Cd exposure were grown in hydroponic solution containing CdCl2 35 µM for 6 days. Avoidance of high Mg concentration in roots was identified as a plant strategy to mitigate Cd toxicity by preventing formation of root hairs. Regarding the mode of action of Cd toxicity, Mn excess in leaves, in addition to the high Cd concentration per se, seems to be coupled to leaf damages that are enhanced by the increased Zn and B concentrations in the photosynthetic tissues. In the second experiment, tolerant (Yoshimatsu) and sensitive (Tropic Two Orders) genotypes were grown in Cd-containing soil, in order to evaluated production parameters. After plant exposure to Cd, the tolerant genotype presented an increased fruit diameter, height and weight, when compared to the control plants. In both cultivars, Cd concentration varied according to the following descending order: roots = leaf blade > (floral receptacle, peduncle and sepals) > stem = fruit peel = fruit pulp. Moreover, data suggested that floral receptacle and its related-structures acted as a barrier to the Cd transportation to the fruits, but it was not enough to avoid Cd reaching the fruits. Furthermore, Cd exposure provoked remarkable reductions in the Mg concentration in roots of sensitive and tolerant genot...

show abstract

Impact of moderate Fe excess under Cd stress on the photosynthetic performance of poplar (Populus jacquemontiana var. glauca cv. Kopeczkii)

Cited by 19 publications

References 39 publications

Stress hardening under long-term cadmium treatment is correlated with the activation of antioxidative defence and iron acquisition of chloroplasts in Populus

Stress hardening under long-term cadmium treatment is correlated with the activation of antioxidative defence and iron acquisition of chloroplasts in Populus

The developmental and iron nutritional pattern of PIC1 and NiCo does not support their interdependent and exclusive collaboration in chloroplast iron transport in Brassica napus

Integrated approach of anatomical, physiological and biochemical parameters for the study of tolerance mechanisms to cadmium in tomato accessions

Contact Info

Product

Resources

About