Peach Tree Short Life in Rio Grande do Sul State, Brazil

Mayer, Newton Alex; Ueno, B.

doi:10.31285/agro.25.395

Cited by 1 publication

(2 citation statements)

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“…Peach (Prunus persica L.) is the most cultivated stone fruit species of the Rosaceae family, with more than 3000 species in approximately 110 genera distributed throughout the world (Eldem et al, 2012). Rootstock cultivars are selected in breeding programs considering the induction of productivity of canopy cultivars, fruit quality, and resistance to biotic and abiotic soil factors, among other factors (Reighard & Loreti, 2008;Betemps et al, 2020;Mayer et al, 2020;Mayer & Ueno, 2021). However, tolerance to excess aluminum (Al) is usually not considered, which is necessary in tropical and subtropical soils (Mayer et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Al 3+ in the solution can impair cell division and elongation, increasing root diameter, decreasing growth and, consequently, volume and surface area (Bahmani et al, 2020;Dorneles et al, 2016;Yan et al, 2021). Thus, the roots are likely to reduce water and nutrient uptake (Reis et al, 2018), which may slow the growth of young peach trees and delay the onset of fruit production (Mayer & Ueno, 2021). However, peach cultivars and clones may present tolerance mechanisms, such as higher Al accumulation in plant tissues, increased root length and surface area and higher dry weight production.…”

Section: Introductionmentioning

confidence: 99%

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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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