Indirect effects of aluminium on photosynthesis and mineral concentration in triticales

Nunes, M. A.; Matos, Marcorelio Carvalho da Silva; Azinheira, H. G.; Quartin, V. L.

doi:10.1007/978-94-009-0173-5_867

Cited by 2 publications

(2 citation statements)

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“…Dry mass (g plant -1 ) Fresh mass (g plant -1 ) Leaf mass ratio for four Citrus spp. rootstocks (Pereira et al 2000), and two Triticosecale cultivars (Nunes et al 1995). The reduced rate of CO 2 assimilation in Al-treated leaves (Table 3) was not caused by stomatal limitation, because the intercellular CO 2 concentration was higher in Al-treated leaves than in control leaves (Table 3).…”

Section: Treatmentmentioning

confidence: 96%

Aluminum-induced decrease in CO2 assimilation in citrus seedlings is unaccompanied by decreased activities of key enzymes involved in CO2 assimilation

Chen

Smith

et al. 2005

Tree Physiology

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'Cleopatra' tangerine (Citrus reshni Hort. ex Tanaka) seedlings were irrigated daily for 8 weeks with 1/4 strength Hoagland's nutrient solution containing 0 (control) or 2 mM aluminum (Al). Leaves from Al-treated plants had decreased CO2 assimilation and stomatal conductance, but increased intercellular CO2 concentrations compared with control leaves. On a leaf area basis, 2 mM Al increased activities of key enzymes in the Calvin cycle, including ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), NADP-glyceraldehyde-3-phosphate dehydrogenase (GAPDH), phosphoribulokinase (PRK), stromal fructose-1,6-bisphosphatase (FBPase), and a key enzyme in starch synthesis, ADP-glucose pyrophosphorylase (AGPase), compared with control leaves. Aluminum had no effect on cytosolic FBPase activity, but it decreased sucrose phosphate synthase (SPS) activity. Aluminum had no effect on area-based concentrations of carbohydrates, glucose-6-phosphate (G6P) and fructose 6-phosphate (F6P) or the G6P:F6P ratio, but it decreased the area-based concentration of 3-phosphoglycerate (PGA). Photochemical quenching coefficient (qP) and electron transport rate through PSII were greatly reduced by Al. Non-photochemical quenching coefficient (NPQ) was less affected by Al than qP and electron transport rate through PSII. We conclude that the reduced rate of CO2 assimilation in Al-treated leaves was probably caused by a combination of factors such as reduced electron transport rate through PSII, increased closure of PSII reaction centers and increased photorespiration.

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Section: Treatmentmentioning

confidence: 96%

Aluminum-induced decrease in CO2 assimilation in citrus seedlings is unaccompanied by decreased activities of key enzymes involved in CO2 assimilation

Chen

Smith

et al. 2005

Tree Physiology

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“…The variability in the adaptation to Al can be observed between plants of the same genus or between varieties of the same species (Nunes et al, 1995, Simon et al, 1994, Massot et al, 1999, and the use of genetic material that is tolerant or resistant to toxicity by Al becomes an important option for the occupation of acid soils.…”

Section: Introductionmentioning

confidence: 99%

Growth of citrus rootstocks under aluminium stress in hydroponics

Pereira

Siqueira²,

Puiatti³

et al. 2003

Sci. agric. (Piracicaba, Braz.)

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Plants present different degrees of adaptation to aluminium (Al) concentrations in the soil, and the understanding of this characteristic can lead to a viable option for the utilization of acid soils. The objective of this experiment was to evaluate the effects of five Al concentrations (0, 50, 100, 200, and 400 µmol L -1 ) on the growth of 'Rangpur' lime ( Citrus limonia Osbeck) and 'Volkamer' lemon (Citrus volkameriana Hort. ex Tan.), and tangerine rootstocks 'Cleópatra' (Citrus reshni Hort. ex Tan) and 'Sunki' ( Citrus sunki Hort. ex Tan.), in hydroponic culture. The treatments were arranged in a randomized block design, with four replications. For all rootstocks, the relative growth rate in terms of plant total fresh matter increased under low and, decreased under large Al concentrations. Growth of the shoot, leaf area ratio and leaf weight ratio decreased for all rootstocks in the presence of Al. The 'Rangpur' lime had a decrease of the root system growth, starting from 23 µmol L -1 of Al. For the remaining rootstocks, this growth reached maximum values at 91 to 117 µmol L -1 of Al, respectively. Considering all the evaluated characteristics of plant growth, the ' Rangpur' lime was the most susceptible to Al. Key words: Citrus sp., relative growth rate, principal components, nutrient solution CRESCIMENTO DE PORTA-ENXERTOS DE CITROS SUBMETIDOS A ESTRESSE POR ALUMÍNIO, EM CULTIVO HIDROPÔNICORESUMO: As plantas apresentam diferentes graus de tolerância aos efeitos tóxicos do alumínio (Al), e a exploração dessa característica pode ser uma opção viável para a utilização dos solos ácidos. Este experimento teve como objetivo avaliar os efeitos de cinco concentrações de alumínio (0, 50, 100, 200 e 400 µmol L -1 de Al) sobre o crescimento dos porta-enxertos limoeiros 'Cravo' ( Citrus limonia Osbeck) e 'Volkameriano' ( Citrus volkameriana Hort. ex Tan.), e tangerineiras 'Cleópatra' (Citrus reshni Hort. ex Tan) e 'Sunki' (Citrus sunki Hort. ex Tan.) em cultivo hidropônico. Os tratamentos foram distribuídos no delineamento de blocos casualizados, com quatro repetições e duas plantas por parcela. Em todos os porta-enxertos, a taxa relativa de crescimento da matéria fresca total da planta aumentou na presença de baixas concentrações de Al e decresceu na presença de maiores concentrações. O crescimento da parte aérea, a relação de área foliar e a relação de massa foliar diminuíram em todos os porta-enxertos na presença do Al. No limoeiro 'Cravo' verificou-se decréscimo de crescimento do sistema radicular a partir de 23 µmol L -1 de Al. Nos demais portaenxertos, esse crescimento atingiu valores máximos na presença de 91 a 117 µmol L -1 de Al, respctivamente. Considerando-se todas as características avaliadas do crescimento de planta, o limoeiro 'Cravo' foi o portaenxerto mais sensível ao Al. Palavras-chave: Citrus, taxa relativa de crescimento, componentes principais, solução nutritiva

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Indirect effects of aluminium on photosynthesis and mineral concentration in triticales

Cited by 2 publications

References 1 publication

Aluminum-induced decrease in CO2 assimilation in citrus seedlings is unaccompanied by decreased activities of key enzymes involved in CO2 assimilation

Aluminum-induced decrease in CO2 assimilation in citrus seedlings is unaccompanied by decreased activities of key enzymes involved in CO2 assimilation

Growth of citrus rootstocks under aluminium stress in hydroponics

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