Growth and physiological responses to cadmium stress of two populations of Dittrichia viscosa (L.) Greuter

Fernández, Roberto García; Bertrand, A.; Reis, Rafaela Amaral Dos; Mourato, Miguel; Martins, L. L.; González, A.

doi:10.1016/j.jhazmat.2012.10.044

Cited by 81 publications

(47 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reduction in Gs after 12 days of cadmium treatments were about 69% and 78% under 5 and 10 mM Cd, respectively, and could be ascribed to plant water balance [69]. Closing the stomatal pores and/or decreasing its density have been reported in other species under salt [24,31] and Cd treatments [33][34]. The stomatal closures along with reductions in chlorophyll contents suggest that both stomatal and non-stomatal restrictions occurred under NaCl and Cd stresses [62].…”

Section: Stomatal Conductancementioning

confidence: 84%

“…disturbances in mineral nutrition and carbohydrate metabolism, and therefore may strongly reduce biomass production [6][7][8]. Decreased biomass due to Cd toxicity could be a direct consequence of inhibited chlorophyll synthesis and photosystem II (PSII) efficiency [9][10].…”

mentioning

confidence: 99%

“…Environmental stresses such as salt [28][29][30][31] and cadmium [32][33][34][35] can also affect photosynthetic pigments and inhibit photosynthesis. It was shown that PSII efficiency depends on pigment concentration and structure [36].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Photosynthetic Responses of Tomato Leaves to Salt and Cadmium Stresses: Growth and Chlorophyll a Fluorescence Kinetic Analyses

Gharbi¹,

Zribi²,

Daly³

et al. 2018

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Section: Stomatal Conductancementioning

confidence: 84%

mentioning

confidence: 99%

See 1 more Smart Citation

Photosynthetic Responses of Tomato Leaves to Salt and Cadmium Stresses: Growth and Chlorophyll a Fluorescence Kinetic Analyses

Gharbi¹,

Zribi²,

Daly³

et al. 2018

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

“…1). This result is in line with the findings that tolerant varieties/cultivars/ecotypes/ populations of diverse plant species have an increased Cd concentration in shoots when compared to the sensitive genotypes (Uraguchi et al, 2009;Fernández et al, 2013), probably due to a high root-to-shoot translocation rate (Zhu et al, 2004;Puschenreiter et al, 2010;Rui et al, 2016), that may provide a great accumulation of this metal in tomato seeds. Another approach that corroborates this hypothesis is the use of ectopic and non-ectopic overexpression of genes that are related to the concurrent increases in the Cd accumulation and plant tolerance, as observed in transformed A. thaliana when compared to non-transformed wild-type (Park et al, 2012;Rui et al, 2016).…”

Section: Is Translocated To the Seeds But Its Concentration Depensupporting

confidence: 90%

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

“…SOD is one of the most effective antioxidant enzymes scavenging oxygen radicals in plants [29] and can convert superoxide radicals into less toxic agents [30]. Furthermore, the concentration of SOD activity is directly related to the degree of cell damage and plant resistance [31].…”

Section: Discussionmentioning

confidence: 99%

The Alleviation of Nutrient Deficiency Symptoms in Changbai Larch (Larix olgensis) Seedlings by the Application of Exogenous Organic Acids

Song

Markewitz

Liu

et al. 2016

Forests

View full text Add to dashboard Cite

Exogenous organic acids are beneficial in protecting plants from the stress of heavy metal toxins (e.g., Pb) in soils. This work focuses on the potential role of organic acids in protecting Changbai larch (Larix olgensis) seedlings from the stress of growing in nutrient deficient soil. The seedlings were planted in a nutrient rich or deficient soil (A 1 horizon of a Haplic Cambisol without organic acid as the nutrient rich control, or fully-mixed A 1 + B horizons in a proportion of 1:2 as deficient) in pots in a greenhouse. In A 1 + B horizons the seedlings were treated daily with concentrations of oxalic or citric acid (OA or CA) at a rate approximately equivalent to 0, 0.04, 0.2, 1.0, or 2.0 mmol·kg −1 of soil for 10, 20, and 30 days. Nutrient deficiency stressed the seedlings as indicated by lipid peroxidation and malondialdehyde (MDA) content in leaves significantly increasing, and superoxide dismutase (SOD) activities, proline, photosynthetic pigment contents, and chlorophyll fluorescence (F v /F m) decreasing. The stress increased in controls over the application periods. When nutrient deficient plants were exposed to an organic acid (especially 5.0 or 10.0 mmol·L −1 for 20 days), the stress as indicated by the physiological parameters was reversed, and survival rate of seedlings, and biomass of root, stem, and leaf significantly increased; CA was more effective than OA. The results demonstrate that exogenous organic acids alleviate nutrient deficiency-induced oxidative injuries and improve the tolerance of L. olgensis seedlings to nutrient deficiency.

show abstract

Growth and physiological responses to cadmium stress of two populations of Dittrichia viscosa (L.) Greuter

Cited by 81 publications

References 52 publications

Photosynthetic Responses of Tomato Leaves to Salt and Cadmium Stresses: Growth and Chlorophyll a Fluorescence Kinetic Analyses

Photosynthetic Responses of Tomato Leaves to Salt and Cadmium Stresses: Growth and Chlorophyll a Fluorescence Kinetic Analyses

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

The Alleviation of Nutrient Deficiency Symptoms in Changbai Larch (Larix olgensis) Seedlings by the Application of Exogenous Organic Acids

Contact Info

Product

Resources

About