Applications of Abscisic Acid and Increasing Concentrations of Calcium Affect the Partitioning of Mineral Nutrients between Tomato Leaf and Fruit Tissue

Abstract

This study examined how abscisic acid (ABA) and calcium (Ca) concentrations in nutrient solution affect concentrations of mineral nutrients in tomato leaves and fruit. Tomato plants were grown in a greenhouse at 25/20 C (day/night) under a 16 h photoperiod. Plants were treated with different concentrations of ABA and Ca. Calcium was applied via the irrigation lines at 60, 90, or 180 mgL−1. ABA was applied as a combination of foliar sprays and root applications. For foliar ABA applications, treatments consisted of deionized (DI) water control (0.0 mg·L−1 ABA) or 500 mg·L−1 ABA. For ABA root applications, treatments consisted of no ABA control (0.0 mg·L−1 ABA) or 50 mg·L−1 ABA applied via the irrigation lines. Results indicate that mineral nutrient concentrations in tomato leaf and fruit tissue varied in connection with each exogenous application of ABA. Variability in mineral nutrient concentration depended on if ABA was applied to the leaf or root tissue. Additionally, increasing Ca treatment concentrations either decreased or did not change mineral nutrients in tomato and fruit tissue. Thus, tomato plants react to acquiring mineral nutrients in numerous mechanisms and, depending on how the applications of exogenous ABA are applied, can have varying effects on these mechanisms.

Heterologous Expression of a Ferritin Homologue Gene PpFer1 from Prunus persica Enhances Plant Tolerance to Iron Toxicity and H2O2 Stress in Arabidopsis thaliana

“…Expression of AtFer2 in Arabidopsis [ 16 , 23 ] and RhFer in cut rose [ 17 ] was induced by ABA treatment, which was also observed in PpFer3 in this study. Indeed, ABA treatment induced the cellular Fe accumulation in all tested Arabidopsis lines, which was in accord with previous studies in transgenic tomato [ 29 ]. Nonetheless, these genes regulated by both Fe and ABA may play a role in the crosstalk between Fe and ABA, and may be an intermediate hub for the cross-linking of iron and ABA signals.…”

Rootstock influences the effect of grapevine leafroll‐associated viruses on berry development and metabolism via abscisic acid signalling

“…Magnesium deficiency tolerance (Livigni et al, 2019 ), the impact of phosphorus deficiency on canopy growth (Grant & Matthews, 1996 ), and potassium uptake and channels are influenced by rootstock (Wolpert et al, 2005 ). Potassium uptake, channel activity, and related gene expression are also regulated by ABA (Blatt, 2000 ; Köhler et al, 2003 ; Rogiers et al, 2017 ; Song et al, 2016 ), and the application of ABA to tomato roots by drip irrigation affects fruit mineral composition (Barickman et al, 2019 ). Furthermore, elevated levels of potassium are observed in leafroll virus‐infected Burger and Sultana fruits (Hale & Woodham, 1979 ; Kliewer & Lider, 1976 ) and in leaf petioles but potassium levels are lower in leaf blades (Cook & Goheen, 1961 ).…”

Effects of Microbial Inoculants and Organic Amendments on Wheat Nutrition and Development in a Variety of Soils

“…Thus, this confirms our hypothesis of an alteration of the Zn partitioning in plants leading to a higher accumulation in grains relative to other organs. This may be attributed to the observed changes in auxin or ABA concentration, since these hormones can regulate transporters involved in metal homeostasis in plants (David-Assael et al 2006;Barickman et al 2019). Increased Zn HI with inoculants and cellulose compared to control led to a decreased molar P-to-Zn ratio in the grain with these treatments and consequently to an improved grain quality, as Zn digestibility is enhanced.…”