Overproduction of <scp>ABA</scp> in rootstocks alleviates salinity stress in tomato shoots

Martínez‐Andújar, Cristina; Martínez-Pérez, Ascensión; Albacete, Alfonso; Martínez-Melgarejo, Purificación A.; Dodd, Ian C.; Thompson, Andrew J.; Mohareb, Fady; Estelles-Lopez, Lucia; Kevei, Zoltán; Ferrández‐Ayela, Almudena; Pérez-Pérez, José Manuel; Gifford, Miriam L.; Pérez‐Alfocea, Francisco

doi:10.1111/pce.14121

Cited by 38 publications

(21 citation statements)

References 104 publications

(222 reference statements)

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“…downregulation of JA biosynthesis genes) that partially explained variation in shoot hormone status (e.g. Martínez‐Andújar et al, 2021). Understanding how these hormones interact in specific tissues (rootstock or scion), and integrate various environmental cues that regulate shoot growth, leaf gas exchange, root growth and root hydraulic conductance, remains a challenging objective.…”

Section: Discussionmentioning

confidence: 99%

Bi‐directional, long‐distance hormonal signalling between roots and shoots of soil water availability

Huntenburg

Puértolas

Ollas

et al. 2022

Physiologia Plantarum

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While the importance of plant water relations in determining crop response to soil water availability is difficult to over‐emphasise, under many circumstances, plants maintain their leaf water status as the soil dries yet shoot gas exchange and growth is restricted. Such observations lead to development of a paradigm that root‐to‐shoot signals regulate shoot physiology, and a conceptual framework to test the importance of different signals such as plant hormones in these physiological processes. Nevertheless, shoot‐to‐root (hormonal) signalling also plays an important role in regulating root growth and function and may dominate when larger quantities of a hormone are produced in the shoots than the roots. Here, we review the evidence for acropetal and basipetal transport of three different plant hormones (abscisic acid, jasmonates, strigolactones) that have antitranspirant effects, to indicate the origin and action of these signalling systems. The physiological importance of each transport pathway likely depends on the specific environmental conditions the plant is exposed to, specifically whether the roots or shoots are the first to lose turgor when exposed to drying soil or elevated atmospheric demand, respectively. All three hormones can interact to influence each other's synthesis, degradation and intracellular signalling to augment or attenuate their physiological impacts, highlighting the complexity of unravelling these signalling systems. Nevertheless, such complexity suggests crop improvement opportunities to select for allelic variation in the genes affecting hormonal regulation, and (in selected crops) to augment root–shoot communication by judicious selection of rootstock–scion combinations to ameliorate abiotic stresses.

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Section: Discussionmentioning

confidence: 99%

Bi‐directional, long‐distance hormonal signalling between roots and shoots of soil water availability

Huntenburg

Puértolas

Ollas

et al. 2022

Physiologia Plantarum

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“…Another stress hormone is ABA. The overexpression of NCED (a key gene for ABA synthesis) in rootstocks might alleviate salinity stress in tomato shoots [ 61 ], suggesting that the root-supplied ABA functions in the salt stress response [ 62 ]. In our study, one NCED gene was found to be significantly up-regulated by salt stress in both P300 and 323F3, suggesting that ABA synthesis was induced by salt in both genotypes.…”

Section: Discussionmentioning

confidence: 99%

Comparative Physiological and Transcriptomic Analyses of Two Contrasting Pepper Genotypes under Salt Stress Reveal Complex Salt Tolerance Mechanisms in Seedlings

Zhang

Sun

Chang

et al. 2022

IJMS

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As a glycophyte plant, pepper (Capsicum annuum L.) is widely cultivated worldwide, but its growth is susceptible to salinity damage, especially at the seedling stage. Here, we conducted a study to determine the physiological and transcriptional differences between two genotype seedlings (P300 and 323F3) with contrasting tolerance under salt stress. The P300 seedlings were more salt-tolerant and had higher K+ contents, higher antioxidase activities, higher compatible solutes, and lower Na+ contents in both their roots and their leaves than the 323F3 seedlings. During RNA-seq analysis of the roots, more up-regulated genes and fewer down-regulated genes were identified between salt-treated P300 seedlings and the controls than between salt-treated 323F3 and the controls. Many ROS-scavenging genes and several SOS pathway genes were significantly induced by salt stress and exhibited higher expressions in the salt-treated roots of the P300 seedlings than those of 323F3 seedlings. Moreover, biosynthesis of the unsaturated fatty acids pathway and protein processing in the endoplasmic reticulum pathway were deeply involved in the responses of P300 to salt stress, and most of the differentially expressed genes involved in the two pathways, including the genes that encode mega-6 fatty acid desaturases and heat-shock proteins, were up-regulated. We also found differences in the hormone synthesis and signaling pathway genes in both the P300 and 323F3 varieties under salt stress. Overall, our results provide valuable insights into the physiological and molecular mechanisms that affect the salt tolerance of pepper seedlings, and present some candidate genes for improving salt tolerance in pepper.

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“…The key enzyme in this pathway is 9-cis-epoxycarotenoid dioxygenase (NCED, EC 1.13.11.51), which catalyzes the rate-limiting step in ABA biosynthesis. Transgenic tomato plants overexpressing the SlNCED gene exhibit a high ABA concentration, which helps the plants overcome transient stressful salinity conditions [ 98 , 99 ]. Several studies and review papers have suggested an important role of ABA in regulating crop tolerance to salinity [ 100 ].…”

Section: Salinity-induced Proteins Amino Acids and Enzymesmentioning

confidence: 99%

Molecular Responses of Vegetable, Ornamental Crops, and Model Plants to Salinity Stress

Toscano

Romano

Ferrante

2023

IJMS

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Vegetable and ornamental plants represent a very wide group of heterogeneous plants, both herbaceous and woody, generally without relevant salinity-tolerant mechanisms. The cultivation conditions—almost all are irrigated crops—and characteristics of the products, which must not present visual damage linked to salt stress, determine the necessity for a deep investigation of the response of these crops to salinity stress. Tolerance mechanisms are linked to the capacity of a plant to compartmentalize ions, produce compatible solutes, synthesize specific proteins and metabolites, and induce transcriptional factors. The present review critically evaluates advantages and disadvantages to study the molecular control of salt tolerance mechanisms in vegetable and ornamental plants, with the aim of distinguishing tools for the rapid and effective screening of salt tolerance levels in different plants. This information can not only help in suitable germplasm selection, which is very useful in consideration of the high biodiversity expressed by vegetable and ornamental plants, but also drive the further breeding activities.

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Overproduction of ABA in rootstocks alleviates salinity stress in tomato shoots

Cited by 38 publications

References 104 publications

Bi‐directional, long‐distance hormonal signalling between roots and shoots of soil water availability

Bi‐directional, long‐distance hormonal signalling between roots and shoots of soil water availability

Comparative Physiological and Transcriptomic Analyses of Two Contrasting Pepper Genotypes under Salt Stress Reveal Complex Salt Tolerance Mechanisms in Seedlings

Molecular Responses of Vegetable, Ornamental Crops, and Model Plants to Salinity Stress

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