Interaction of Salicylic Acid with Plant Hormones in Plants Under Abiotic Stress

Salicylic acid (SA) is well known hormonal molecule involved in cell death regulation. In response to a broad range of environmental factors (e.g., high light, UV, pathogens attack), plants accumulate SA, which participates in cell death induction and spread in some foliar cells. LESION SIMULATING DISEASE 1 (LSD1) is one of the best-known cell death regulators in Arabidopsis thaliana. The lsd1 mutant, lacking functional LSD1 protein, accumulates SA and is conditionally susceptible to many biotic and abiotic stresses. In order to get more insight into the role of LSD1-dependent regulation of SA accumulation during cell death, we crossed the lsd1 with the sid2 mutant, caring mutation in ISOCHORISMATE SYNTHASE 1(ICS1) gene and having deregulated SA synthesis, and with plants expressing the bacterial nahG gene and thus decomposing SA to catechol. In response to UV A+B irradiation, the lsd1 mutant exhibited clear cell death phenotype, which was reversed in lsd1/sid2 and lsd1/NahG plants. The expression of PR-genes and the H2O2 content in UV-treated lsd1 were significantly higher when compared with the wild type. In contrast, lsd1/sid2 and lsd1/NahG plants demonstrated comparability with the wild-type level of PR-genes expression and H2O2. Our results demonstrate that SA accumulation is crucial for triggering cell death in lsd1, while the reduction of excessive SA accumulation may lead to a greater tolerance toward abiotic stress.

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Enhancement of resistance by poultry manure and plant hormones (salicylic acid & citric acid) against tobacco mosaic virus

Saudi Journal of Biological Sciences ◽

10.1016/j.sjbs.2021.03.025 ◽

2021 ◽

Author(s):

Abdul Basit ◽

Muhammad Farhan ◽

Wei-Di Mo ◽

Hai-Xia Ding ◽

Muhammad Ikram ◽

...

Keyword(s):

Salicylic Acid ◽

Citric Acid ◽

Tobacco Mosaic Virus ◽

Mosaic Virus ◽

Plant Hormones ◽

Poultry Manure

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MES7 Modulates Seed Germination via Regulating Salicylic Acid Content in Arabidopsis

Plants ◽

10.3390/plants10050903 ◽

2021 ◽

Vol 10 (5) ◽

pp. 903

Author(s):

Wenrui Gao ◽

Yan Liu ◽

Juan Huang ◽

Yaqiu Chen ◽

Chen Chen ◽

...

Keyword(s):

Salicylic Acid ◽

Salt Stress ◽

Abiotic Stress ◽

Seed Germination ◽

Environmental Conditions ◽

Acid Content ◽

Hydrolytic Enzyme ◽

Stress Conditions ◽

Transitional Period ◽

Highly Sensitive

Seed germination is an important phase transitional period of angiosperm plants during which seeds are highly sensitive to different environmental conditions. Although seed germination is under the regulation of salicylic acid (SA) and other hormones, the molecular mechanism underlying these regulations remains mysterious. In this study, we determined the expression of SA methyl esterase (MES) family genes during seed germination. We found that MES7 expression decreases significantly in imbibed seeds, and the dysfunction of MES7 decreases SA content. Furthermore, MES7 reduces and promotes seed germination under normal and salt stress conditions, respectively. The application of SA restores the seed germination deficiencies of mes7 mutants under different conditions. Taking together, our observations uncover a MeSA hydrolytic enzyme, MES7, regulates seed germination via altering SA titer under normal and abiotic stress conditions.

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Effects on Plant Hormone levels at Different Growth Stages in Diverse Grape Organs with Root Restriction

10.21203/rs.3.rs-681245/v1 ◽

2021 ◽

Author(s):

Jiajia Li ◽

Dongmei Li ◽

Boyang Liu ◽

Ruiqi Wang ◽

Yixuan Yan ◽

...

Keyword(s):

Salicylic Acid ◽

Abscisic Acid ◽

Plant Hormones ◽

Growth Stages ◽

Indolebutyric Acid ◽

Hormone Levels ◽

Berry Quality ◽

Isopentenyl Adenine ◽

Root Restriction ◽

Different Growth Stages

Abstract Endogenous plant hormones play important roles in germination, blossom, senescence, abscission of plants by a series of signal transduction and molecular regulation. The purpose of this research was to investigate the influence of root restriction (RR) cultivation on plant hormones variation tendency at different growth stages in diverse organs or tissues, ‘Muscat Hamburg’ (Vitis ‘Muscat of Alexandria’ × Vitis ‘Trollinger’) grapevine was used as test material. High Performance Liquid Chromatography (HPLC) was used to quantify hormone levels, aiming to investigate the influence of root restriction on the formation and transportation of plant hormones. The results revealed that RR treatment increased abscisic acid, salicylic acid, zeatin riboside, N6-(delta 2-isopentenyl)-adenine nucleoside concentrations, while reduced auxin, 3-indolepropionic acid, 3-indolebutyric acid, gibberellin A3, zeatin, N6-(delta 2-Isopentenyl)-adenine, kinetin, jasmonic acid and methyl jasmonate concentrations. To sum up, our results suggested that RR treatment could initiate stress responses via up-regulating abscisic acid and salicylic acid contents while down-regulating auxin and kinetin contents, resulting in the changes of fruit appearance and improvement of berry quality.

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Hitting the Wall—Sensing and Signaling Pathways Involved in Plant Cell Wall Remodeling in Response to Abiotic Stress

Plants ◽

10.3390/plants7040089 ◽

2018 ◽

Vol 7 (4) ◽

pp. 89 ◽

Cited By ~ 38

Author(s):

Lazar Novaković ◽

Tingting Guo ◽

Antony Bacic ◽

Arun Sampathkumar ◽

Kim Johnson

Keyword(s):

Cell Wall ◽

Abiotic Stress ◽

Plant Hormones ◽

Plant Cell Wall ◽

Key Factors ◽

Cell Wall Remodeling ◽

Dynamic Cell ◽

Adverse Environmental Conditions ◽

Cell Wall Deposition ◽

Cell Wall Properties

Plant cells are surrounded by highly dynamic cell walls that play important roles regulating aspects of plant development. Recent advances in visualization and measurement of cell wall properties have enabled accumulation of new data about wall architecture and biomechanics. This has resulted in greater understanding of the dynamics of cell wall deposition and remodeling. The cell wall is the first line of defense against different adverse abiotic and biotic environmental influences. Different abiotic stress conditions such as salinity, drought, and frost trigger production of Reactive Oxygen Species (ROS) which act as important signaling molecules in stress activated cellular responses. Detection of ROS by still-elusive receptors triggers numerous signaling events that result in production of different protective compounds or even cell death, but most notably in stress-induced cell wall remodeling. This is mediated by different plant hormones, of which the most studied are jasmonic acid and brassinosteroids. In this review we highlight key factors involved in sensing, signal transduction, and response(s) to abiotic stress and how these mechanisms are related to cell wall-associated stress acclimatization. ROS, plant hormones, cell wall remodeling enzymes and different wall mechanosensors act coordinately during abiotic stress, resulting in abiotic stress wall acclimatization, enabling plants to survive adverse environmental conditions.

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Salicylic acid-induced abiotic stress tolerance and underlying mechanisms in plants

Frontiers in Plant Science ◽

10.3389/fpls.2015.00462 ◽

2015 ◽

Vol 6 ◽

Cited By ~ 242

Author(s):

M. Iqbal R. Khan ◽

Mehar Fatma ◽

Tasir S. Per ◽

Naser A. Anjum ◽

Nafees A. Khan

Keyword(s):

Salicylic Acid ◽

Abiotic Stress ◽

Stress Tolerance ◽

Abiotic Stress Tolerance ◽

Underlying Mechanisms

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Targeting Plant Hormones to Develop Abiotic Stress Resistance in Wheat

Wheat Production in Changing Environments ◽

10.1007/978-981-13-6883-7_22 ◽

2019 ◽

pp. 557-577 ◽

Cited By ~ 8

Author(s):

Ali Raza ◽

Sundas Saher Mehmood ◽

Javaria Tabassum ◽

Raufa Batool

Keyword(s):

Abiotic Stress ◽

Plant Hormones ◽

Stress Resistance

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Genome-Wide Identification, Evolutionary And Expression Analyses of LEA Gene Family In Peanut (Arachis Hypogaea L.)

10.21203/rs.3.rs-775523/v1 ◽

2021 ◽

Author(s):

RuoLan Huang ◽

Dong Xiao ◽

Xin Wang ◽

Yi Shen ◽

Jie Zhan ◽

...

Keyword(s):

Salicylic Acid ◽

Abiotic Stress ◽

Stress Response ◽

Gene Family ◽

Segmental Duplication ◽

Abiotic Stresses ◽

Tandem Duplication ◽

Critical Role ◽

Recognition Sites ◽

Genome Wide

Abstract Background: Late embryogenesis abundant (LEA) proteins are a group of highly hydrophilic glycine-rich proteins, which accumulate in the late stage of seed maturation and are associated with many abiotic stresses. However, few peanut LEA genes had been reported, and the research on the number, location, structure, molecular phylogeny and expression of AhLEAs was very limited. Results: In this study, 126 LEA genes were identified in the peanut genome through genome-wide analysis and were further divided into eight groups. Sequence analysis showed that most of the AhLEAs (85.7 %) had no or only one intron. LEA genes were randomly distributed on 20 chromosomes. Compared with tandem duplication, segmental duplication played a more critical role in AhLEAs amplication, and 93 segmental duplication AhLEAs and 5 pairs of tandem duplication genes were identified. Synteny analysis showed that some AhLEAs genes come from a common ancestor, and genome rearrangement and translocation occurred among these genomes. Almost all promoters of LEAs contain ABRE, MYB recognition sites, MYC recognition sites, and ERE cis-acting elements, suggesting that the LEA genes were involved in stress response. Gene expression analyses revealed that most of the LEAs were expressed in the late stages of peanut embryonic development. LEA3 (AH16G06810.1, AH06G03960.1), and Dehydrin (AH07G18700.1, AH17G19710.1) were highly expressed in roots, stems, leaves and flowers. Moreover, 100 AhLEAs were involved in response to drought, low-temperature, or Al stresses. Some LEAs that were regulated by different abiotic stresses were also regulated by hormones including ABA, brassinolide, ethylene and salicylic acid. Interestingly, AhLEAs that were up-regulated by ethylene and salicylic acid showed obvious subfamily preferences.Conclusions: AhLEAs are involved in abiotic stress response, and segmental duplication plays an important role in the evolution and amplification of AhLEAs. The genome-wide identification, classification, evolutionary and expression analyses of the AhLEA gene family provide a foundation for further exploring the LEA genes’ function in response to abiotic stress in peanuts.

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