ABA Regulation of Plant Responses to Drought and Salt Stresses

Ma, Yun; Qin, Feng

doi:10.1007/978-94-017-9424-4_16

Cited by 12 publications

(18 citation statements)

References 161 publications

(158 reference statements)

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“…The proper plant response to abiotic stresses like drought stress requires a fine‐tuned ABA signalling pathway (Shinozaki et al ., ; Ma and Qin, ). The altered sensitivity to the drought stress in poco1 points towards impairment of the ABA signalling transduction pathway, which was supported by the lower expression of ABI5 in the poco1 plants and their decreased responsiveness to ABA with respect to primary root growth and days to flowering.…”

Section: Discussionmentioning

confidence: 99%

PRECOCIOUS1 (POCO1), a mitochondrial pentatricopeptide repeat protein affects flowering time in Arabidopsis thaliana

Emami

Kempken

2019

The Plant Journal

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Flowering is a vital developmental shift in plants from vegetative to reproductive phase. The timing of this shift is regulated by various linked genetic pathways including environmental cues and internal regulation. Here we report a role for an Arabidopsis gene, AT1G15480, which encodes a P-class pentatricopeptide repeat (PPR) protein, affecting flowering time. We show that AT1G15480 is localized to mitochondria. An AT1G15480 T-DNA insertion line exhibits an early-flowering phenotype, which is quite a rare phenotype among PPR mutants. The early-flowering phenotype was observed under both long and short days compared with wild type plants. Genetic complementation confirmed the observed phenotype. We therefore named the PPR protein PRECOCIOUS1 (POCO1). poco1 plants showed lower respiration, ATP content and higher accumulation of superoxide. Importantly, the quantitative reverse transcription polymerase chain reaction (qRT-PCR) analysis showed that the expression of FLOWERING LOCUS C (FLC), which is a key floral repressor, was strongly downregulated in the poco1. Likewise, the expression level of the FLC positive regulator ABSCISIC ACID-INSENSITIVE 5 (ABI5) was reduced in the poco1. Consistent with the qRT-PCR results, poco1 plants showed reduced sensitivity to abscisic acid compared with wild type with respect to primary root growth and days to flowering. Furthermore, the poco1 mutation enhances the sensitivity to drought stress. Further analysis showed that POCO1 affects mitochondrial RNA editing. Taken together, our data demonstrate a remarkable function of POCO1 in flowering time and the abscisic acid signalling pathway.

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Section: Discussionmentioning

confidence: 99%

PRECOCIOUS1 (POCO1), a mitochondrial pentatricopeptide repeat protein affects flowering time in Arabidopsis thaliana

Emami

Kempken

2019

The Plant Journal

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“…The first group includes genes that produce important metabolic proteins to protect cells and tissues from stressful conditions. These genes encode enzymes for the biosynthesis of osmolyte, acid metabolism, and cell detoxification, as well as those for water channel proteins, membrane transporters, proteins for protection of macromolecules such as Late Embryogenesis Abundant (LEA) proteins and osmotins, etc [76]. The second group includes genes primarily encoding regulatory proteins for modulating downstream genes expression in response to stressful conditions, such as protein kinases, protein phosphatases, transcription factors, and so on [76].…”

Section: Aba Regulation Of Plant Responses To Drought and Salt Stressesmentioning

confidence: 99%

“…These genes encode enzymes for the biosynthesis of osmolyte, acid metabolism, and cell detoxification, as well as those for water channel proteins, membrane transporters, proteins for protection of macromolecules such as Late Embryogenesis Abundant (LEA) proteins and osmotins, etc [76]. The second group includes genes primarily encoding regulatory proteins for modulating downstream genes expression in response to stressful conditions, such as protein kinases, protein phosphatases, transcription factors, and so on [76]. The transcription factors interact with cis-acting elements to regulate the expression of stress-inducible genes and finally confer tolerance to stress on the plants [8].…”

Section: Aba Regulation Of Plant Responses To Drought and Salt Stressesmentioning

confidence: 99%

Role of ABA in Overcoming Environmental Stress: Sensing, Signaling and Crosstalk

Benderradji¹,

Saibi²,

Brini³

2021

annagriccropsci

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The Abscisic Acid (ABA) is an isoprenoid phytohormone, regulating various physiological processes ranging from stomatal opening to protein storage. Moreover, it provides adaptation to drought, salt and cold stresses acts also as a signaling mediator during the plant’s adaptive response to environmental conditions. In addition, numbers of transcription factors are involved in regulating the expression of ABA responsive genes by interacting with their respective cis-acting elements. ABA signal transduction initiates signal perception by ABA receptors and transfer via downstream proteins, including protein kinases and phosphatases. Hence, for improvement in plants-stress-tolerance capacity, it is necessary to understand the mechanism behind it. On this ground, this article lightens the importance and also the role of ABA signaling with regard to various stresses as well as regulation of ABA biosynthetic pathway along with the transcription factors for stress tolerance.

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“…The cellular dehydration that triggers ABA biosynthesis in the chloroplast mesophyll tissues involves various enzymes and the utilization of β‐carotene (Mengel et al 2001, Wani et al 2016, Vishwakarma et al 2017). The stomatal responses are closely related to soil water potential, with its closure inhibiting transpiration and increasing the water flow in the plant through hydraulic conductivity (Mengel et al 2001, Ma and Qin 2014, Osakabe et al 2014, Salehi‐Lisar and Bakhshayeshan‐Agdam 2016). The plasma membrane and tonoplast use the ion and water transport systems to control turgor pressure changes in the guard cell.…”

Section: Introductionmentioning

confidence: 99%

“…The plasma membrane and tonoplast use the ion and water transport systems to control turgor pressure changes in the guard cell. The guard cells detect the increase of ABA levels, leading to a subsequent reduction of turgor and volume to avoid water loss, and trigger the stomatal closure (Ma and Qin 2014, Osakabe et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Abscisic acid phytohormone estimation in tubers and shoots of Ipomoea batatas subjected to long drought stress using competitive immunological assay

Gouveia

Ganança

Śląski

et al. 2020

Physiologia Plantarum

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Sweet potato (Ipomoea batatas L.), typically cultivated in temperate climates under low inputs, is one of the most important crops worldwide. Abscisic acid (ABA) is an important plant stress-induced phytohormone. Hitherto, few works analyzed the ABA function in sweet potato tissue growth. Very scarce information is available concerning the ABA role in sweet potato response to water scarcity conditions. Here, we show the ABA content variation in shoots and tubers of eight sweet potato accessions subjected to drought stress. ABA was also related to other resistance traits, such as chlorophyll content index (CCI), carbon isotopic discrimination (Δ 13 C), oxalic acid (OA) and water use efficiency (WUE), to assess stress response mechanisms to water deficit between their organs. The most resilient droughtstressed sweet potato plants accumulated ABA-shoot, and significantly decreased the ABA-tuber content. ABA signaling was related to Δ 13 C and CCI decrease and WUE increment, as an attempt to cope with water stress by partially closing the stomata. The partial closure of stomata could be in part due to the presence of OA-shoots, known to affect the intensity of the ABA-shoot signal in stomatal closure. Higher CCI content and minimal Δ 13 C-shoot differences indicated good carboxylation fractionation, with higher Δ 13 C-tuber content as an indicator of efficient tuber 13 C fixation and growth. Our work demonstrated that ABA could be used in conjunction with the other traits studied for the assessment of sweet potato whole-plant responses to environmental stresses, and thus aid the selection of the best drought tolerant genotypes for breeding programs.

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ABA Regulation of Plant Responses to Drought and Salt Stresses

Cited by 12 publications

References 161 publications

PRECOCIOUS1 (POCO1), a mitochondrial pentatricopeptide repeat protein affects flowering time in Arabidopsis thaliana

PRECOCIOUS1 (POCO1), a mitochondrial pentatricopeptide repeat protein affects flowering time in Arabidopsis thaliana

Role of ABA in Overcoming Environmental Stress: Sensing, Signaling and Crosstalk

Abscisic acid phytohormone estimation in tubers and shoots of Ipomoea batatas subjected to long drought stress using competitive immunological assay

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