Aluminum Effects on Growth, Photosynthesis, and Mineral Nutrition of Cacao Genotypes

Ribeiro, Miguel A. Q.; Almeida, Alex-Alan Furtado de; Mielke, Marcelo Schramm; Gomes, Fábio Pinto; Pires, Marcel Viana; Baligar, V. C.

doi:10.1080/01904167.2013.766889

Cited by 74 publications

(44 citation statements)

References 51 publications

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“…We also noticed increased Al uptake under Al stress. The first symptom of Al toxicity is the inhibition of root elongation associated with uptake of Al, which disturbs the root functions including water and nutrient uptake under Al stress [1]- [20]. Panda et al [21] reported that long-term Al treated plants could not uptake water due to the interaction of Al with root cell nuclei, inhibiting cell division and cytoskeleton formation.…”

Section: Discussionmentioning

confidence: 99%

Salicylic Acid Alleviates Aluminum Toxicity in Tomato Seedlings (Lycopersicum esculentum Mill.) through Activation of Antioxidant Defense System and Proline Biosynthesis

Surapu¹,

Ediga²,

Meriga³

2014

ABB

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The aim of this work was to evaluate the alleviating efficacy of salicylic acid (100, 250 and 500 μM) against the toxic effects of aluminum (Al) on two tomato cultivars (GOWRI and SIRI) differing in their sensitivity to Al stress. Al treatment (500 µM) caused 40% -80% drop in plant growth, relative water content (RWC) and cell viability and a reduction of 1 -2.5 fold and 0.5 -2 fold in glutathione and proline content respectively, when compared to their control plants grown in Al free medium. Al treatment also resulted in 2 -5 fold raise in malondialdehyde (MDA) levels, 2 -3 fold higher Al uptake and 55% -80% more electrolyte leakage and caused severe DNA damage. Al stress enhanced (1 -2 fold) the activities of superoxide dismutase (SOD) and peroxidase (POD), but decreased catalase (CAT) activity over their respective controls. Exogenously-applied Salicylic acid (SA) significantly (p < 0.05) and dose-dependently alleviated Al-induced toxicity in tomato seedlings as marked by much improved plant growth, retention of higher RWC, cell viability, glutathione and proline content. SA also caused 0.6 -1.5 fold reduction in Al uptake, 50% -80% less electrolyte leakage, 40% -80% drop in lipid peroxidation and considerable protection against DNA damage. Also, supplementation of SA could considerably reverse the Al-induced changes in the activities of SOD, POD and CAT. Together, our findings demonstrate that, SA is an efficient growth regulator with diversified roles that contribute to its potential alleviating effect against Al induced toxicity and SIRI is a relatively Al-resistant cultivar compared to GOWRI. * Corresponding author. V. Surapu et al.778

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Section: Discussionmentioning

confidence: 99%

Salicylic Acid Alleviates Aluminum Toxicity in Tomato Seedlings (Lycopersicum esculentum Mill.) through Activation of Antioxidant Defense System and Proline Biosynthesis

Surapu¹,

Ediga²,

Meriga³

2014

ABB

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“…The decreased Mg 2? (Rengel and Zhang 2003;Ribeiro et al 2013). 1a) may be due (1) to decreased Mg 2?…”

Section: Discussionmentioning

confidence: 99%

Aluminum resistance in wheat involves maintenance of leaf Ca2+ and Mg2+ content, decreased lipid peroxidation and Al accumulation, and low photosystem II excitation pressure

Moustaka

Ouzounidou²,

Bayçu

et al. 2016

Biometals

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The phytotoxic aluminum species (Al(3+)) is considered as the primary factor limiting crop productivity in over 40 % of world's arable land that is acidic. We evaluated the responses of two wheat cultivars (Triticum aestivum L.) with differential Al resistance, cv. Yecora E (Al-resistant) and cv. Dio (Al-sensitive), exposed to 0, 37, 74 and 148 μM Al for 14 days in hydroponic culture at pH 4.5. With increasing Al concentration, leaf Ca(2+) and Mg(2+) content decreased, as well as the effective quantum yield of photosystem II (PSII) photochemistry (Φ PSII ), while a gradual increase in leaf membrane lipid peroxidation, Al accumulation, photoinhibition (estimated as F v /F m ), and PSII excitation pressure (1 - q p ) occurred. However, the Al-resistant cultivar with lower Al accumulation, retained larger concentrations of Ca(2+) and Mg(2+) in the leaves and kept a larger fraction of the PSII reaction centres (RCs) in an open configuration, i.e. a higher ratio of oxidized to reduced quinone A (QA), than plants of the Al-sensitive cultivar. Four times higher Al concentration in the nutrient solution was required for Al-resistant plants (148 μM Al) than for Al-sensitive (37 μM Al), in order to establish the same closed RCs. Yet, the decline in photosynthetic efficiency in the cultivar Dio was not only due to closure of PSII RCs but also to a decrease in the quantum yield of the open RCs. We suggest that Al(3+) toxicity may be mediated by nutrient deficiency and oxidative stress, and that Al-resistance of the wheat cultivar Yecora E, may be due at least partially, from the decreased Al accumulation that resulted to decreased reactive oxygen species (ROS) formation. However, under equal internal Al accumulation (exposure Al concentration: Dio 74 μM, Yecora E 148 μM) that resulted to the same oxidative stress, the reduced PSII excitation pressure and the better PSII functioning of the Al-resistant cultivar was probably due to the larger concentrations of Ca(2+) and Mg(2+) in the leaves. We propose that the different sensitivities of wheat cultivars to Al(3+) toxicity can be correlated to differences in the redox state of QA. Thus, chlorophyll fluorescence measurements can be a promising tool for rapid screening of Al resistance in wheat cultivars.

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“…The same consequences are observed in both young and adult plants, such as fragility and dehydration of tissues (Ozyiğit & Akinci, 2009;Batista et al, 2013), which interfere with plant transpiration. These disorders can interfere with physiological processes, such as photosynthesis (Ribeiro et al, 2013;Parihar et al, 2015), because CO 2 assimilation is disfavored, when the stomata are closed for a long time period. Biochemical responses, such as increased enzymatic activity and production of metabolites from secondary metabolism, also cause an imbalance in the physiological processes (Boscolo et al, 2003;Richter, Erban, Kopka, & Zörb, 2015;Pidatala et al, 2018).…”

Section: Stomata and Foliar Anatomymentioning

confidence: 99%

“…The first plant response to Al 3+ stress is inhibition of root growth (S. Dipierro, Mondelli, Paciolla, Brunetti, & N. Dipierro, 2005), limited nutrient and water uptake, and reduced production (Lenoble et al, 2000;Sade et al, 2016). Studies show that Al 3+ also induces a decrease in chlorophyll content, photosynthetic rate, stomatal conductance, and leaf transpiration (Ali et al, 2008;Ribeiro et al, 2013). In addition, acidic soils are less fertile because Al 3+ reduces the availability of phosphorus, sulfur, and other cations to plants (Sade et al, 2016;Singh et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Growth and Anatomical Alterations in Leaves of Popcorn Induced by Abiotic Stresses

Trevizan¹,

Magalhães²,

Souza³

2018

JAS

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Stress by salt and aluminum (Al+3) causes significant loss in the growth of popcorn. Effects on the initial growth, especially of leaves and stomata, are poorly investigated, while no information is available for some cultivars. This work aims at verifying the effect of stress caused by salt and Al+3 on the initial growth, morphometry, and morphology of popcorn stomata (IAC-125), as well as on its foliar anatomy. In the presence of 50 mM or higher concentrations of NaCl, popcorn seedlings showed a reduction of 50% in shoot mass gains as compared to the control. With 150 mM or higher concentrations, mass gains reduced by 33% in popcorn root system as compared to the control. Small increases in shoot length were observed in seedlings treated with Al+3.The root system was highly affected by 160 µM or higher Al+3 concentrations. Pore opening and stomatal subsidiary cell width were altered under both salt and Al+3 stress. Stomatal density changes were observed only under salt stress. Tissue disruptions and cell numberreductions were verified in the epidermis and parenchyma under high Al+3 and saltconcentrations. The largest xylem and phloem cells were preserved in all treatments. Stress resulted in dehydration of plant tissues, which showed retraction under high concentrations of salt and Al+3due to anatomical changes in the leaves and morphometry of the stomata. Our results demonstrated that these characteristics contributed to a remarkable tolerance to salinity and aluminum, since they have an important protective role against different environmental stresses.

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Aluminum Effects on Growth, Photosynthesis, and Mineral Nutrition of Cacao Genotypes

Cited by 74 publications

References 51 publications

Salicylic Acid Alleviates Aluminum Toxicity in Tomato Seedlings (Lycopersicum esculentum Mill.) through Activation of Antioxidant Defense System and Proline Biosynthesis

Salicylic Acid Alleviates Aluminum Toxicity in Tomato Seedlings (Lycopersicum esculentum Mill.) through Activation of Antioxidant Defense System and Proline Biosynthesis

Aluminum resistance in wheat involves maintenance of leaf Ca2+ and Mg2+ content, decreased lipid peroxidation and Al accumulation, and low photosystem II excitation pressure

Growth and Anatomical Alterations in Leaves of Popcorn Induced by Abiotic Stresses

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