The aluminum distribution and translocation in two citrus species differing in aluminum tolerance

Zhang, Han; Li, Xinyu; Lin, Mei-lan; Hu, Pingping; Lai, Ning-Wei; Huang, Zeng-Rong; Chen, Li‐Song

doi:10.1186/s12870-022-03472-5

Cited by 5 publications

(1 citation statement)

References 59 publications

(63 reference statements)

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“…The Al concentration in the canopy, except for own-rooted 'BRS Mandinho,' did not differ between plants cultivated with and without Al (Figure 4a). This is desirable, as it indicates a lower probability of Al translocation to the fruit (H. Zhang et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

Tolerance of cultivars and clonal selections of peach rootstocks to excess aluminum

Aguilar,

Moura-Bueno,

Mayer

et al. 2023

Sem. Ci. Agr.

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Forms of aluminum (Al) present in the solution of tropical and subtropical soils can cause toxicity in rootstocks and peach cultivars, impairing growth and productivity. This can be minimized by growing Al-tolerant rootstocks and cultivars. However, this is not sufficiently known, especially because plant breeding programs do not always consider tolerance as a selection variable for genetic materials. The study aimed to (a) select cultivars and clonal selections of Al-tolerant peach rootstocks, (b) identify variables that confer Al tolerance for use in genetic improvement programs, and (c) propose critical levels (NC) and ranges of toxicity (TF) of Al in relation to morphological variables of the root system. The experimental design was completely randomized, comprising a factorial of 13 (cultivars and clonal selections) x 2 (with and without Al) with three replications. Own-rooted ‘BRS Mandinho’ peach seedlings (without rootstock) and grafted seedlings of ‘BRS Mandinho’ on different cultivars and clonal rootstock selections were cultivated in a hydroponic system, composing two levels for the Al factor (absence and presence at 100 mg L−1). The morphological variables of the canopy and root system, Al accumulation in tissues, translocation factor, and the critical level (NC) and toxicity range (TF) of Al in the roots were evaluated. Rootstocks FB-SM-09-43, JB-ESM-09-13, SAS-SAU-09-71, SS-CHI-09-40, ‘Sharpe’ and VEH-GRA-09-55 were tolerant at high Al concentrations. The NC of Al in the roots in relation to the root surface area of peach rootstocks was 1400 mg Al kg−1, and the FT was between 1200 and 1500 mg Al kg−1.

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Section: Resultsmentioning

confidence: 99%

Tolerance of cultivars and clonal selections of peach rootstocks to excess aluminum

Aguilar,

Moura-Bueno,

Mayer

et al. 2023

Sem. Ci. Agr.

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Triggering root proton efflux as an aluminum-detoxifying mechanism in cassava

Punpom

Leksungnoen

Aramrak

et al. 2022

Annals of Agricultural Sciences

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The adaptation of root cell wall pectin to copper toxicity in two citrus species differing in copper tolerance: remodeling and responding

Lin,

Lu,

Zhou

et al. 2023

Tree Physiology

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Citrus species are prone to be suffered from copper (Cu) toxicity because of improper application of Cu-based agrochemicals. The Cu immobilization mediated by the pectin methylesterase (PME) in the root cell wall (CW) is effective for Cu-detoxification. However, the underlying mechanisms of the structural modification and stress responses of citrus root CW pectin to Cu toxicity were less discussed. In the present study, seedlings of ‘Shatian pummelo’ [Citrus grandis (L.) Osbeck] and ‘Xuegan’ [Citrus sinensis (L.) Osbeck], which differed in Cu tolerance, were irrigated with nutrient solution containing 0.5 (as control), 100, 300 or 500 μM Cu for 18 weeks in sandy culture or within 24 hours in hydroponics. By the end of treatments in 18 weeks’ sandy culture, the Cu toxicity on the CW pectin content, the Cu distribution, the degree of pectin methylesterification, and the PME enzyme activity were discussed. At the genome-wide level, the PME gene family was identified from two citrus species and the qRT-PCR array of citrus PMEs under control and 300 μM Cu stress for 18 weeks were performed to screen the Cu-responsive PME genes. Moreover, the candidate genes that responded to Cu toxicity were further examined within 24 hours. The results showed that Cu toxicity increased the root CW pectin content. The root CW pectin under Cu toxicity was remodeled by upregulating the expression of the Cu-responsive PME genes followed by increasing PME activity, which mainly promoted the low methylesterased pectin level and the Cu content on the root CW pectin. Compared to C. sinensis, C. grandis root CW had a lower degree of pectin methylesterification and higher Cu content on the Cu-stressed root CW pectin, contributing to its higher Cu tolerance. Our present study provided theoretical evidence on the root CW pectin remodeling in response to Cu toxicity of citrus species.

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The aluminum distribution and translocation in two citrus species differing in aluminum tolerance

Cited by 5 publications

References 59 publications

Tolerance of cultivars and clonal selections of peach rootstocks to excess aluminum

Tolerance of cultivars and clonal selections of peach rootstocks to excess aluminum

Triggering root proton efflux as an aluminum-detoxifying mechanism in cassava

The adaptation of root cell wall pectin to copper toxicity in two citrus species differing in copper tolerance: remodeling and responding

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