Effects of aluminum toxicity on nutrient accumulation in maize shoots: Implications on photosynthesis

Lidon, Fernando C.; Barreiro, M.G.; Ramalho, José C.; Lauriano, J.A.

doi:10.1080/01904169909365637

Cited by 46 publications

(26 citation statements)

References 40 publications

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“…Thus, as roots were only washed with deionized water before Al analysis, the values obtained for Al concentrations are related to both absorbed and adsorbed mechanisms. The sharp increase in root Al concentrations was closely related to the level of Al in the nutrient solution, as has been reported elsewhere (Lidon et al, 1999). Moreover, the quite high Al concentration measured in root tissues in the control was related to a direct uptake from the water/tray substrate.…”

Section: Discussionsupporting

confidence: 60%

Physiological and oxidative stress responses of four potato clones to aluminum in nutrient solution

Tabaldi¹,

Nicoloso²,

Castro³

et al. 2007

Braz. J. Plant Physiol.

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Aluminum toxicity is a serious problem in Brazilian soils and selecting potato clones is an important strategy to produce this crop on these kinds of soils. Potato clones, Macaca, SMIC148-A, Dakota Rose, and Solanum microdontum, were grown in a nutrient solution (pH 4.0) with 0, 50, 100, 150 and 200 mg Al L -1 . After 7 d, Al concentration in both root system and shoot of all clones increased linearly with increasing Al levels. Based on relative root growth, S. microdontum and SMIC148-A were considered Al-tolerant clones, whereas Macaca and Dakota Rose were considered Al-sensitive. Shoot growth in Macaca linearly decreased with increasing Al levels. Root H 2 O 2 concentration in both Al-sensitive clones increased with increasing Al supply, whereas in Al-tolerant clones it either decreased (SMIC148-A) or demonstrated no alteration (S. microdontum). Shoot H 2 O 2 concentration increased linearly in Macaca, whereas for Dakota Rose it showed a quadratic relationship with Al levels. On the other hand, shoot H 2 O 2 concentration in the Al-tolerant clones either demonstrated no alteration (S. microdontum) or presented lower levels (SMIC148-A). Root catalase (CAT) activity in both Al-sensitive clones increased with increasing Al levels, whereas in Al-tolerant clones it either demonstrated no alteration (SMIC148-A) or presented lower levels (S. microdontum). Shoot CAT activity in the S. microdontum increased curvilinearly with increasing Al levels. In all potato clones, chlorophyll concentration showed a curvilinear response to Al supply, where in Al-sensitive clones it decreased upon addition of Al exceeding 100 mg L -1 , but in SMIC148-A it increased at levels between approximately 100 and 150 mg L -1 , and decreased in S. microdontum regardless of the Al level. Carotenoid concentrations in the Al-sensitive clones were linearly decreased with increasing Al levels. Aluminum supply caused root lipid peroxidation only in the Al-sensitive clones, whereas in the shoot it increased linearly in the Al-sensitive clones and in S. microdontum it only increased at around 50 mg L -1 . Most of root protein oxidation was only observed in the Al-sensitive clones. However, shoot protein oxidation was increased with increasing Al levels for all potato clones. These results indicate that oxidative stress caused by Al in potato may harm several components of the cell, mainly in Al-sensitive clones. Keywords: aluminum toxicity, antioxidative enzymes, growth, oxidative stress, Solanum tuberosum Respostas fisiológicas e de estresse oxidativo de quarto clones de batata ao alumínio em solução nutritiva: A toxicidade do alumínio é um problema sério em solos brasileiros e a seleção de clones de batata é uma estratégia importante para produzir essa cultura em tais solos.

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Section: Discussionsupporting

confidence: 60%

Physiological and oxidative stress responses of four potato clones to aluminum in nutrient solution

Tabaldi¹,

Nicoloso²,

Castro³

et al. 2007

Braz. J. Plant Physiol.

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“…Injured roots are stubby and thickened with inhibited secondary growth (1). Inhibition of shoot growth, in turn, seems to be a secondary response to Al, being mediated through interactions between root Al concentrations and the concurrent modulation of nutrient translocation mechanisms to the shoot (3). In fact, restricted shoot growth becomes evident only after root growth has been limited by prolonged exposure to toxic levels of Al ions in the rooting environment (4).…”

Section: Introductionmentioning

confidence: 99%

“…In leaves, Al toxicity may lead to malformations in chloroplasts, which display a swollen and distended shape, even though detectable amounts of Al may not be observed (5), thus indicating indirect effects of Al on chloroplast functioning. Aluminum-mediated toxicity may also affect the maximum rates of Mehler reaction and, therefore, the maximum NADP þ reduction, which then would affect the in vivo photosynthetic metabolism (3). In effect, decreases in both total chlorophyll (chl) content and photosynthetic rates have been reported for some species (2,6).…”

Section: Introductionmentioning

confidence: 99%

Responses of the Photosynthetic Apparatus to Aluminum Stress in Two Sorghum Cultivars

Peixoto

Matta

2002

Journal of Plant Nutrition

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This work focused on the effects of aluminum (Al) stress on photosynthetic apparatus using Al-tolerant and sensitive cultivars of sorghum (Sorghum bicolor (L.) Moench). Plants were grown in Clark's nutrient solution aerated continuously and adjusted daily to pH 4.0 and containing two Al concentrations (0 and 185 mmol m À 3 ) supplied as Al 2 (SO 4 ) 3 Á 18H 2 O. Measurements were performed on recently expanded leaves from the eighth to sixteenth day after imposing Al treatments. In general, chloroplastidic pigment concentration, chlorophyll fluorescence parameters, and photosynthetic rates were initially affected by Al stress to a greater extent in the Al-tolerant cultivar than in the susceptible cultivar. However, the Al-tolerant genotype JOURNAL OF PLANT NUTRITION, 25(4), 821-832 (2002) 821 seemed to cope with high Al via progressive, sustained decreases in initial chlorophyll fluorescence and increases in chlorophyll a=b ratio, photosystem II photochemical efficiency, net carbon assimilation rate, and photosynthetic oxygen evolution. In contrast, the Al-sensitive cultivar did not show any apparent acclimation response to high Al application. The results suggest that the harmful effects of Al on photosynthesis might be partially alleviated through time-dependent mechanisms, particularly in the Al-tolerant sorghum cultivar.

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“…Al inhibits root growth and elongation by different mechanisms, including Al interactions within symplast, plasma membrane and cell wall (Kochian 1995, Pineros and Kochian 2001, Yang et al 2008. Several studies revealed that Al stress decreased net photosynthetic rate (PN) and chlorophyll (Chl) content in tomato (Simon et al 1994), maize (Lidon et al 1999, Mihailovic et al 2008, Citrus spp. , Chen et al 2005a, and soybean ).…”

Section: Introductionmentioning

confidence: 99%

The effect of chromium and aluminum on growth, root morphology, photosynthetic parameters and transpiration of the two barley cultivars

Ali¹,

Zeng²,

Qiu³

et al. 2011

Biologia plant.

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The effect of aluminum and chromium on two barley genotypes differing in Al tolerance was studied in a hydroponic experiment. Al stress decreased plant growth, biomass production, chlorophyll content and photosynthetic efficiency determined as variable to maximum chlorophyll fluorescence ratio (F v /F m ), net photosynthetic rate (P N ), intercellular CO 2 concentration (c i ), stomatal conductance (g s ) and transpiration rate (E) less in an Al-tolerant genotype Gebeina than in an Al-sensitive genotype Shang 70-119. Cr stress also caused marked reduction in growth and photosynthetic traits in barley plants. Higher reduction was observed at pH 4.0 as compared to pH 6.5. Combined stress of Cr and Al, caused further reduction in growth and photosynthetic parameters.

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Effects of aluminum toxicity on nutrient accumulation in maize shoots: Implications on photosynthesis

Cited by 46 publications

References 40 publications

Physiological and oxidative stress responses of four potato clones to aluminum in nutrient solution

Physiological and oxidative stress responses of four potato clones to aluminum in nutrient solution

Responses of the Photosynthetic Apparatus to Aluminum Stress in Two Sorghum Cultivars

The effect of chromium and aluminum on growth, root morphology, photosynthetic parameters and transpiration of the two barley cultivars

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