Phytohormones and Drought Stress: Plant Responses to Transcriptional Regulation

Pandey, Neha; Iqbal, Zahra; Pandey, Bhoopendra K.; Sawant, Samir V.

doi:10.1002/9781118889022.ch34

Cited by 28 publications

(16 citation statements)

References 187 publications

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“…These effects of chitosan on roots are likely to modify rhizodeposition ( Pitta-Alvarez and Giulietti, 1999 ). Chitosan membrane depolarization may trigger an increase of reactive oxygen species (ROS) in the plant cell, generating secondary metabolites ( Pandey, 2017 ). ROS are known to alter chemical components of the cell and lipids in particular.…”

Section: Discussionmentioning

confidence: 99%

Chitosan Induces Plant Hormones and Defenses in Tomato Root Exudates

et al. 2020

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In this work, we use electrophysiological and metabolomic tools to determine the role of chitosan as plant defense elicitor in soil for preventing or manage root pests and diseases sustainably. Root exudates include a wide variety of molecules that plants and root microbiota use to communicate in the rhizosphere. Tomato plants were treated with chitosan. Root exudates from tomato plants were analyzed at 3, 10, 20, and 30 days after planting (dap). We found, using high performance liquid chromatography (HPLC) and excitation emission matrix (EEM) fluorescence, that chitosan induces plant hormones, lipid signaling and defense compounds in tomato root exudates, including phenolics. High doses of chitosan induce membrane depolarization and affect membrane integrity. 1 H-NMR showed the dynamic of exudation, detecting the largest number of signals in 20 dap root exudates. Root exudates from plants irrigated with chitosan inhibit ca. twofold growth kinetics of the tomato root parasitic fungus Fusarium oxysporum f. sp. radicis-lycopersici. and reduced ca. 1.5-fold egg hatching of the root-knot nematode Meloidogyne javanica .

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Section: Discussionmentioning

confidence: 99%

Chitosan Induces Plant Hormones and Defenses in Tomato Root Exudates

et al. 2020

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“…Plants are affected by poor environmental conditions, which interrupt normal growth and productivity. Drought is one of the most important abiotic stresses which causes osmotic stress in plants and profoundly affects crop production worldwide each year [ 1 ]. Plants respond to abiotic stresses by changing the varieties of cellular processes [ 2 – 4 ], and wax secretion from the plant epidermal cells to cuticle represents one of these significant changes.…”

Section: Introductionmentioning

confidence: 99%

Three endoplasmic reticulum-associated fatty acyl-coenzyme a reductases were involved in the production of primary alcohols in hexaploid wheat (Triticum aestivum L.)

Chai¹,

Li²,

Feng³

et al. 2018

BMC Plant Biol

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BackgroundThe cuticle covers the surface of the polysaccharide cell wall of leaf epidermal cells and forms an essential diffusion barrier between the plant and the environment. The cuticle is composed of cutin and wax. Cuticular wax plays an important role in the survival of plants by serving as the interface between plants and their biotic and abiotic environments, especially restricting nonstomatal water loss. Leaf cuticular waxes of hexaploid wheat at the seedling stage mainly consist of primary alcohols, aldehydes, fatty acids, alkane and esters. Primary alcohols account for more than 80% of the total wax load. Therefore, we cloned several genes encoding fatty acyl-coenzyme A reductases from wheat and analyzed their function in yeast and plants. We propose the potential use of these genes in wheat genetic breeding.ResultsWe reported the cloning and characterization of three TaFARs, namely TaFAR6, TaFAR7 and TaFAR8, encoding fatty acyl-coenzyme A reductases (FAR) in wheat leaf cuticle. Expression analysis revealed that TaFAR6, TaFAR7 and TaFAR8 were expressed at the higher levels in the seedling leaf blades, and were expressed moderately or weakly in stamen, glumes, peduncle, flag leaf blade, sheath, spike, and pistil. The heterologous expression of three TaFARs in yeast (Saccharomyces cerevisiae) led to the production of C24:0 and C26:0 primary alcohols. Transgenic expression of the three TaFARs in tomato (Solanum lycopersicum) and rice (Oryza sativa) led to increased accumulation of C24:0–C30:0 primary alcohols. Transient expression of GFP protein-tagged TaFARs revealed that the three TaFAR proteins were localized to the endoplasmic reticulum (ER), the site of wax biosynthesis. The three TaFAR genes were transcriptionally induced by drought, cold, heat, powdery mildew (Blumeria graminis) infection, abscisic acid (ABA) and methyl jasmonate (MeJa) treatments.ConclusionsThese results indicated that wheat TaFAR6, TaFAR7 and TaFAR8 are involved in biosynthesis of very-long-chain primary alcohols in hexaploid wheat and in response to multiple environmental stresses.Electronic supplementary materialThe online version of this article (10.1186/s12870-018-1256-y) contains supplementary material, which is available to authorized users.

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“…Elucidation of the biological processes governing plant regulatory networks requires detailed information of plant responses at genome level towards different stress and developmental stimuli. In comparison to the previous ‘gene-by-gene’ method, the introduction of high-throughput approaches such as microarray, RNA sequencing, Expressed Sequence Tags (EST) analysis, site-directed mutagenesis, loss- and gain-of-function analysis have contributed to precisely identify the location of a candidate gene in the signaling cascade and its role in abiotic and biotic stress tolerance [ 5 , 6 , 10 ]. Omics based technologies are often exercised in a high throughput mode, therefore, generate huge amount of data.…”

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confidence: 99%

Editorial: Genomics and Functional Genomics of Stress-mediated Signaling in Plants: Volume I

Pandey

2017

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Phytohormones and Drought Stress: Plant Responses to Transcriptional Regulation

Cited by 28 publications

References 187 publications

Chitosan Induces Plant Hormones and Defenses in Tomato Root Exudates

Chitosan Induces Plant Hormones and Defenses in Tomato Root Exudates

Three endoplasmic reticulum-associated fatty acyl-coenzyme a reductases were involved in the production of primary alcohols in hexaploid wheat (Triticum aestivum L.)

Editorial: Genomics and Functional Genomics of Stress-mediated Signaling in Plants: Volume I

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