Aluminum-induced high IAA concentration may explain the Al susceptibility in Citrus limonia

Silva, Carolina M. S.; Cavalheiro, Mariana Feitosa; Bressan, Anna Carolina Gressler; Carvalho, Brenda Mistral Oliveira; Banhos, Otávia F. A. A.; Purgatto, Eduardo; Harakava, Ricardo; Tanaka, Francisco André Ossamu; Habermann, Gustavo

doi:10.1007/s10725-018-0458-5

Cited by 22 publications

(19 citation statements)

References 54 publications

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“…S1b). The reasons why root growth is inhibited under Al presence have been investigated (Zheng & Yang 2005;Kopittke et al, 2008;2015;Horst et al, 2010;Rao et al, 2016;Silva et al, 2019), but given the complexity of the processes involved in the root growth inhibition, the exact mechanism by which Al stunt root growth remains elusive (Singh et al, 2017).…”

Section: Plant Growthmentioning

confidence: 99%

“…However, the difficulty about Lpr measurement can be related to the expectation of normalized data per unit root area (m²) or root biomass (g), as usually calculated in studies of plant water deficit (Rodríguez-Gamir et al, 2015;Ding et al, 2019). But unlike plants exposed to Al, in which the root system does not grow (Delhaize & Ryan 1995;Kopittke et al, 2008;Horst et al, 2010;Fig. 1d, e) and the roots are anatomically damaged (Batista et al, 2013;Banhos et al, 2016;Silva et al, 2019), roots of plants under water deficiency grow significantly more, including the involvement of ABA (Saab et al, 1990) and are not anatomically damaged. In addition, in water deficiency studies, water availability is limited in the substrate/soil, whereas plants tested in Al toxicity studies are, usually, grown directly in nutrient solutions, where water availability is unlimited, like in the present study.…”

Section: Hydraulic Mechanismmentioning

confidence: 99%

“…For instance, fibrous xylem vessels were observed in C. limonia grown in nutrient solution with Al and showing low leaf and gs (Banhos et al, 2016). Al causes more lignin deposition (Silva et al, 2019) and structural damage in the vascular cylinder (Batista et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation

Gavassi

Dodd

Puértolas

et al. 2020

Environmental and Experimental Botany

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Many studies ask how aluminum (Al) reduces the root growth, but as Al is mostly retained in the root system, the physiological explanations for the also expected Al-induced decrease in stomatal conductance (gs) are unclear, mainly in well-watered conditions. We exposed tomato plants (Solanum lycopersicum) to 0, 25, 50 and 100 M Al in nutrient solution to investigate whether Al impairs root hydraulic conductance (Lpr), affecting leaf water potential (leaf) and possibly inducing abscisic acid (ABA) accumulation in roots and/or leaves. We also measured ABA delivery rate, xylem sap pH and the root/leaf area ratio in order to explain the low gs in plants exposed to Al. Declines in Lpr and gs were proportional to the increase in Al concentration, and all Al treatments similarly decreased leaf, indicating the plant's attempt to maintain leaf water status while accumulating more ABA. Despite Al-induced increases in root ABA, the root-to-shoot delivery of ABA did not enhance, but Al caused root xylem sap alkalization. Despite the stability of root/leaf area ratio across a range of Al concentrations (0, 25 and 50 M Al), the leaf hydration and stomatal opening was not conserved. Here we provide the first evidence that decreases in Lpr and increases in ABA might explain Al-induced stomatal closure.

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Section: Plant Growthmentioning

confidence: 99%

Section: Hydraulic Mechanismmentioning

confidence: 99%

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Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation

Gavassi

Dodd

Puértolas

et al. 2020

Environmental and Experimental Botany

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“…In the sandy culture, the biomass of citrus seedlings was depressed by Al toxicity, inducing the oxidative stress and the photosynthetic inhibition of citrus seedlings [11]. Likewise, in the hydroponic culture, high Al concentration induced chlorotic and mottled leaves, thick root tips and less brous roots of citrus rootstocks [12].…”

Section: Introductionmentioning

confidence: 99%

“…We have evaluated citrus species that differed in Al tolerance at bio-physiological [12,19], transcriptional [20] and proteomic levels [21,22]. Our prior studies indicated C. sinensis is much tolerant to Al toxicity than C. grandis.…”

Section: Introductionmentioning

confidence: 99%

The Aluminum Distribution and Translocation in Two Citrus Species Differing in Aluminum Tolerance

Zhang

Lin

et al. 2021

Preprint

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Background: Many citrus orchards of south China suffer from soil acidification, which induced aluminum (Al) toxicity. The Al-immobilization in vivo is crucial for Al detoxification. However, the distribution and translocation of excess Al in citrus species were not well illustrated.Results: The seedlings of ‘Xuegan’ [Citrus sinensis (L.) Osbeck] and ‘Shatianyou’ [Citrus grandis (L.) Osbeck] that differed in Al tolerance were hydroponically treated with nutrient solution (Control) or supplemented by 1.0 mM Al3+ (Al toxicity) for 21 days after three months of pre-culture. The Al distribution at the tissue level of citrus species following the order: lateral roots > primary roots > leaves > stems. The fragmentation of fresh lateral roots revealed the ratio of Al distribution at the cell wall, cell organelle and cytoplasmic supernatant was about 8:2:1 of two citrus species under Al stress. Besides, the Al distribution at the lateral root cell wall components suggested the pectin is the most Al-accumulating site in citrus species. Compared to C. grandis, C. sinensis had a significantly higher Al concentration on the cell wall of lateral roots whereas remarkably lower Al levels on the leaves and stems. Furthermore, the Al translocation revealed by the absorption kinetics of the cell wall demonstrated that C. sinensis had a higher Al retention and stronger Al affinity on the root cell wall than C. grandis. According to the FTIR (Fourier transform infrared spectroscopy) analysis, the Al distribution and translocation might be affected by modifying the structure and components of the citrus lateral root cell wall. Conclusions: A higher Al-retention, mainly targeted by the pectin of the root cell wall, and a lower Al translocation efficiency from roots to shoots contributed to a higher Al tolerance of C. sinensis than C. grandis.

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Plant Response to Toxic Metals: Emerging Sources, Phytohormone Role, and Tolerance Responses

Gavassi

Carvalho

Bressan

et al. 2023

Plant Hormones and Climate Change

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Aluminum-induced high IAA concentration may explain the Al susceptibility in Citrus limonia

Cited by 22 publications

References 54 publications

Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation

Aluminum-induced stomatal closure is related to low root hydraulic conductance and high ABA accumulation

The Aluminum Distribution and Translocation in Two Citrus Species Differing in Aluminum Tolerance

Plant Response to Toxic Metals: Emerging Sources, Phytohormone Role, and Tolerance Responses

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