Avocado rootstock influences scion leaf mineral content

Lazare, Silit; Haberman, Amnon; Yermiyahu, Uri; Erel, Ran; Simenski, Eli; Dag, Arnon

doi:10.1080/03650340.2019.1672163

Cited by 22 publications

(18 citation statements)

References 47 publications

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“…The decrease in its level in our experiment was expected, due to accelerated growth, measured as trunk diameter, between April and October (Figure 4), and the high sink of fruit during the autumn. Fluctuations in leaf N content in correlation with reproduction were reported in other fruit trees, such as almond [38], olive [39,40], and avocado [41]. It is noticeable that N concentration in diagnostic leaves was highest in 2018 ( Figure 1), although the treatment was constant during all the years.…”

Section: Discussionmentioning

confidence: 51%

Optimizing Nitrogen Application for Growth and Productivity of Pomegranates

et al. 2020

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Quantification of actual plant consumption of nitrogen (N) is necessary to optimize fertilization efficiency and minimize contamination of earth resources. We examined the performance of fruit-bearing pomegranate trees grown in soilless media and exposed to eight N-fertigation treatments, from 5 to 200 mg N L−1. Reproductive and vegetative indices were found to be optimal when 20 to 70 mg N L−1 was supplied. Nitrogen application levels over 70 mg L−1 reduced pomegranate development and reproduction. N uptake in low-level treatments was almost 100% and decreased gradually, down to 13% in 200 mg N L−1 treatment. N usage efficiency was maximized under 20 mg N L−1, in which case 80% to 90% of added N was taken up by the trees. At high N application, its efficiency was reduced with less than 50% utilized by the trees. Leaf N increased to a plateau as a function of increasing irrigation solution N, maximizing at ~15 to 20 mg N g−1. Therefore, analysis of diagnostic leaves is not a valid method to identify excessive detrimental N. The results should be valuable in the development of efficient, sustainable, environmentally responsible protocols for N fertilization in commercial pomegranate orchards, following adaptation and validation to real soil field conditions.

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Section: Discussionmentioning

confidence: 51%

Optimizing Nitrogen Application for Growth and Productivity of Pomegranates

et al. 2020

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“…This phenomenon is likely to stem from divergent levels of root Cl absorption and exclusion, as well as transport mechanisms [ 42 , 43 , 44 ]. In our experiment, the rootstocks that exhibited the highest leaf Cl concentration (VC 840 and Dusa, Figure 1 ) were both of a Mexican genetic background, which is characterized by this trait [ 17 , 45 , 46 ]. The combination of ‘Hass’ scion with a Mexican rootstock was found to be extremely salt-sensitive, with significant damages when the EC is higher than 0.6 dS/m [ 47 ].…”

Section: Discussionmentioning

confidence: 99%

“…Its rootstocks are of three primary genetic sources: Mexican, West Indian, and Guatemalan [ 16 ]. Mexican rootstocks were found to be more susceptible to salinity than others [ 17 , 18 ]. Physiological responses of avocado to salt exposure or wastewater irrigation were investigated and reviewed during the last 15 years in a number of studies [ 6 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Rootstock-Dependent Response of Hass Avocado to Salt Stress

Lazare

Cohen

Goldshtein

et al. 2021

Plants

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Salt stress is a major limiting factor in avocado (Persea americana) cultivation, exacerbated by global trends towards scarcity of high-quality water for irrigation. Israeli avocado orchards have been irrigated with relatively high-salinity recycled municipal wastewater for over three decades, over which time rootstocks were selected for salt-tolerance. This study’s objective was to evaluate the physiological salt response of avocado as a function of the rootstock. We irrigated fruit-bearing ‘Hass’ trees grafted on 20 different local and introduced rootstocks with water high in salts (electrical conductivity of 1.4–1.5 dS/m). The selected rootstocks represent a wide range of genetic backgrounds, propagation methods, and horticultural characteristics. We investigated tree physiology and development during two years of salt exposure by measuring Cl and Na leaf concentrations, leaf osmolality, visible damages, trunk circumference, LAI, CO2 assimilation, stomatal conductance, spectral reflectance, stem water potential, trichomes density, and yield. We found a significant effect of the rootstocks on stress indicators, vegetative and reproductive development, leaf morphogenesis and photosynthesis rates. The most salt-sensitive rootstocks were VC 840, Dusa, and VC 802, while the least sensitive were VC 159, VC 140, and VC 152. We conclude that the rootstock strongly influences avocado tree response to salinity exposure in terms of physiology, anatomy, and development.

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“…En el caso de los elementos Ca y Mg se registraron diferencias significativas solo a los 180 ddt, y las concentraciones de estos elementos tuvieron un comportamiento inverso con las aplicaciones de altas dosis de K. Los elementos nutritivos tanto en suelo como en tejido vegetal tienen una gran cantidad de interacciones que pueden afectar el contenido específico de cada elemento [23], con respecto a las relaciones K/Mg y K/Ca se han reportado fuertes antagonismos, llegándose a causar deficiencias de Mg y Ca debidas a excesos en fertilización potásica [24,25]. [26,29] En suelos con pH bajo, la disponibilidad y absorción de este elemento se eleva y puede causar toxicidad [4,29], que se manifiesta en síntomas característicos como quemadura de hojas, defoliación y menor contenido de clorofila [29,30]. En el caso del Zn, todos los tratamientos excepto n2 x k2 obtuvieron concentraciones similares a los 270 ddt, estos valores se aproximaron al límite máximo reportado para este catión [30,32].…”

Section: Concentración De Nutrientesunclassified

EFECTO DE DOS NIVELES DE NITRÓGENO Y POTASIO APLICADOS POR FERTIRRIEGO EN LAS VARIABLES DE CRECIMIENTO Y CONCENTRACIÓN DE MACRO Y MICRONUTRIENTES EN PLANTAS DE AGUACATE (Persea americana Mill.) Var. HASS

Gaona

Vásquez

Viera

et al. 2020

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Actualmente, el cultivo de aguacate var. Hass está tomando importancia en el Ecuador, sin embargo, existe escasa información con respecto al manejo nutricional de esta variedad, dando como resultado cosechas con baja productividad y calidad. Debido al inadecuado manejo en los ámbitos nutricional y de riego, además de la alta demanda de nitrógeno (N) y potasio (K) del aguacate, esta investigación tuvo como objetivo determinar el efecto de dos dosis de N y K en la fase crecimiento. El ensayo se implementó utilizando plantas de aguacate var. Hass, los tratamientos fueron aplicados mediante un sistema de fertirriego. El experimento se desarrolló en la Granja Experimental Tumbaco del INIAP bajo un diseño experimental completamente al azar (DCA) en arreglo factorial 2 x 2, teniendo cuatro tratamientos resultado de la interacción de dos niveles de N y K y cuatro observaciones. Se realizó la comparación de medias DMS al 5% cuando se presentaron diferencias significativas. Las variables analizadas fueron: altura de planta, diámetro del tallo, índice de verdor, área foliar y concentración foliar de nutrientes. Con base a los resultados obtenidos, se observaron diferencias significativas en las variables: índice de verdor y concentración de nutrientes.

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Avocado rootstock influences scion leaf mineral content

Cited by 22 publications

References 47 publications

Optimizing Nitrogen Application for Growth and Productivity of Pomegranates

Optimizing Nitrogen Application for Growth and Productivity of Pomegranates

Rootstock-Dependent Response of Hass Avocado to Salt Stress

EFECTO DE DOS NIVELES DE NITRÓGENO Y POTASIO APLICADOS POR FERTIRRIEGO EN LAS VARIABLES DE CRECIMIENTO Y CONCENTRACIÓN DE MACRO Y MICRONUTRIENTES EN PLANTAS DE AGUACATE (Persea americana Mill.) Var. HASS

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