Members of the abscisic acid co-receptor PP2C protein family mediate salicylic acid-abscisic acid crosstalk

AbstractThe interplay between abscisic acid (ABA) and salicylic acid (SA) influences plant responses to various (a)biotic stresses; however, the underlying mechanism(s) for this crosstalk is largely unknown. Here we report that type 2C protein phosphatases (PP2Cs), some of which are negative regulators of ABA signaling, bind SA. SA binding suppressed the ABA-enhanced interaction between these PP2Cs and various ABA receptors belonging to the PYR/PYL/RCAR protein family. Additionally, SA suppressed ABA-enhanced degradation of PP2Cs and ABA-induced stabilization of SnRK2s. Supporting SA’s role as a negative regulator of ABA signaling, exogenous SA suppressed ABA-induced gene expression, whereas SA-deficient sid2-1 mutants displayed heightened PP2C degradation and hypersensitivity to ABA-induced suppression of seed germination. Together, these results suggest a new molecular mechanism through which SA antagonizes ABA signaling. A better understanding of the crosstalk between these hormones is important for improving the sustainability of agriculture in the face of climate change.

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Arabidopsis RADICAL-INDUCED CELL DEATH1 Belongs to the WWE Protein–Protein Interaction Domain Protein Family and Modulates Abscisic Acid, Ethylene, and Methyl Jasmonate Responses

The Plant Cell ◽

10.1105/tpc.021832 ◽

2004 ◽

Vol 16 (7) ◽

pp. 1925-1937 ◽

Cited By ~ 144

Author(s):

Reetta Ahlfors ◽

Saara Lång ◽

Kirk Overmyer ◽

Pinja Jaspers ◽

Mikael Brosché ◽

...

Keyword(s):

Abscisic Acid ◽

Methyl Jasmonate ◽

Protein Interaction ◽

Protein Family ◽

Interaction Domain ◽

Protein Protein Interaction ◽

Domain Protein

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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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Effect of Salicylic Acid and Abscisic Acid on Drought Stress of Waxy Corn

Korean Journal of Crop Science ◽

10.7740/kjcs.2014.59.1.054 ◽

2014 ◽

Vol 59 (1) ◽

pp. 54-58 ◽

Cited By ~ 3

Author(s):

Youngho Seo ◽

Kijin Park ◽

Eunha Chang ◽

Sihwan Ryu ◽

Jongyeol Park ◽

...

Keyword(s):

Salicylic Acid ◽

Abscisic Acid ◽

Drought Stress ◽

Waxy Corn

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EFFECT OF SALICYLIC ACID AND ABSCISIC ACID ON MORPHO-PHYSIOLOGICAL AND ANATOMICAL CHARACTERS OF FABA BEAN PLANTS (Vicia faba L.) UNDER DROUGHT STRESS

Journal of Plant Production ◽

10.21608/jpp.2015.52096 ◽

2015 ◽

Vol 6 (11) ◽

pp. 1771-1788 ◽

Cited By ~ 9

Author(s):

Kh. Abdelaal

Keyword(s):

Salicylic Acid ◽

Abscisic Acid ◽

Drought Stress ◽

Vicia Faba ◽

Faba Bean ◽

Bean Plants ◽

Vicia Faba L ◽

Anatomical Characters

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Study on the vase life of Chyrsanthemum indicum cultivar Sakura cutting flower

Science and Technology Development Journal - Natural Sciences ◽

10.32508/stdjns.v4i1.829 ◽

2020 ◽

Vol 4 (1) ◽

pp. First

Author(s):

Thắng Thanh Trần ◽

Triều Phương Hoàng ◽

Hương Thanh Trần

Keyword(s):

Salicylic Acid ◽

Abscisic Acid ◽

Plant Growth ◽

Total Sugar ◽

Vase Life ◽

Cut Flowers ◽

Chrysanthemum Indicum ◽

Flower Quality ◽

Two Stages ◽

Physiological And Biochemical

Chrysanthemum indicum cultivar Sakura is one of the daisy cultivars. It is beautiful, but the vase life of cutting flowers is very short. The decrease in flower quality during storage and transportation is a big problem in the flower export. In this study, the morphological, physiological, and biochemical changes during the vase life of cutting flowers were analyzed. The effects of plant growth regulators and sucrose at different concentrations on the vase life of cut flowers were investigated. The vase life of Sakura cutting flowers includes two stages: (1) the growing and blooming of flower, (2) senescence of cutting flowers. During the growing and blooming, the color of disk flowers changed from green to yellow, and the ray flowers continued to expand the dimension leading to an increase in the diameter of the head flower. The senescence of cutting flowers was initiated by the reduction of chlorophyll content in the leaf, which was located at the base. Then, the ray flowers were discolored. In the senescence stage, the respiration rate and the content of the abscisic acid of head flower increased continuously. In contrast, the water absorption, the content of starch, total sugar, salicylic acid, auxin, cytokinin, and gibberellin decreased strongly. The treatment of 10 g/L sucrose, 2 mg/L NAA, 5 mg/L BA, and 20 mg/L salicylic acid in 24 hours extended the vase life of Sakura cutting flowers and the diameter of the head flower.

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