Protein kinase <scp><b>SnRK2</b></scp>.<b>4 is a key regulator of aquaporins and root hydraulics in Arabidopsis</b>

Shahzad, Zaigham; Tournaire‐Roux, Colette; Canut, Matthieu; Adamo, Mattia; Roeder, Jan; Verdoucq, Lionel; Martinière, Alexandre; Amtmann, Anna; Santoni, Véronique; Grill, Erwin; Loudet, Olivier; Maurel, Christophe

doi:10.1111/tpj.16494

Cited by 6 publications

(1 citation statement)

References 75 publications

(138 reference statements)

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“…These studies indicate the important role of AQPs in abiotic stress. Additionally, protein kinase SnRK2.4, which is a key regulator, works by phosphorylating the first cytoplasmic loop of the PIP protein and further regulates the water transport capacity of roots in A. thaliana [82]. MePIP2;7 is involved in magnesium ion transport through its interaction with MeMGT9 in cassava [83], suggesting that AQP genes have great potential for transporting small molecules.…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide Identification and Expression Pattern Profiling of the Aquaporin Gene Family in Papaya (Carica papaya L.)

Zeng,

Jia,

et al. 2023

IJMS

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Aquaporins (AQPs) are mainly responsible for the transportation of water and other small molecules such as CO2 and H2O2, and they perform diverse functions in plant growth, in development, and under stress conditions. They are also active participants in cell signal transduction in plants. However, little is known about AQP diversity, biological functions, and protein characteristics in papaya. To better understand the structure and function of CpAQPs in papaya, a total of 29 CpAQPs were identified and classified into five subfamilies. Analysis of gene structure and conserved motifs revealed that CpAQPs exhibited a degree of conservation, with some differentiation among subfamilies. The predicted interaction network showed that the PIP subfamily had the strongest protein interactions within the subfamily, while the SIP subfamily showed extensive interaction with members of the PIP, TIP, NIP, and XIP subfamilies. Furthermore, the analysis of CpAQPs’ promoters revealed a large number of cis-elements participating in light, hormone, and stress responses. CpAQPs exhibited different expression patterns in various tissues and under different stress conditions. Collectively, these results provided a foundation for further functional investigations of CpAQPs in ripening, as well as leaf, flower, fruit, and seed development. They also shed light on the potential roles of CpAQP genes in response to environmental factors, offering valuable insights into their biological functions in papaya.

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Section: Discussionmentioning

confidence: 99%

Genome-Wide Identification and Expression Pattern Profiling of the Aquaporin Gene Family in Papaya (Carica papaya L.)

Zeng,

Jia,

et al. 2023

IJMS

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Contrasting Regulation of Phaseolus vulgaris Root Hydraulic Properties Under Drought and Saline Conditions by Three Arbuscular Mycorrhizal Fungal Species From Soils with Divergent Moisture Regime

Erice,

Cano,

Bago

et al. 2024

J Soil Sci Plant Nutr

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Purpose Arbuscular mycorrhizal fungi (AMF) may help plants to overcome abiotic stresses, in part by improving their water uptake capacity. However how different AMF isolated from different climatic regions regulate plant abiotic stress tolerance and water uptake capacity is barely studied. The aim of this study was to reveal how three AMF isolated from two Mediterranean climate locations contrasting in annual precipitation, modify bean (Phaseolus vulgaris L.) root hydraulic properties facing drought and salinity. Methods Rhizophagus intraradices (Ri) and Funneliformis mosseae (Fm) were isolated from a humid area, whereas Claroideoglomus etunicatum (Ce) was isolated from a dry location. All plants (inoculated or not) were subjected to four days of withholding water or salt treatment. Root hydraulic properties including root hydraulic conductivity and aquaporin expression and abundance were determined. Results All three AMF isolate induced significant differences in plant physiology regardless their different mycorrhizal colonization extent. Drought treatment diminished root hydraulic conductivity and only Fm inoculated plants featured measurable amount of sap exudate. After salt irrigation, AMF inoculation counterbalanced the drop of root hydraulic conductivity. In such situation two AMF, Fm and Ce, presented lowered phosphorylated (Ser-283) PIP2 AQP amount. AQP gene expression highlighted the importance of PvPIP1;2 and PvPIP2;3 plasticity in plants facing osmotic stress. After drought treatment AMF species from the humid location, Ri and Fm, improved plant water status and Fm enhanced root hydraulic conductivity, whereas all AMF performed similarly after salt irrigation, enhancing stomatal conductance and root hydraulic conductivity. Conclusion Under drought conditions, the AMF isolates from humid regions were the ones that most effectively improved plant water relations. However, under salt stress, all three AMF isolates exhibited similar behavior. Therefore, to some extent, the climatic origin of the AMF could have influenced the response of host plants to drought stress, suggesting that those originating from dry areas may not necessarily be the most efficient.

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Not so hidden anymore: Advances and challenges in understanding root growth under water deficits

Voothuluru,

Wu,

Sharp

2024

The Plant Cell

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Limited water availability is a major environmental factor constraining plant development and crop yields. One of the prominent adaptations of plants to water deficits is the maintenance of root growth that enables sustained access to soil water. Despite early recognition of the adaptive significance of root growth maintenance under water deficits, progress in understanding has been hampered by the inherent complexity of root systems and their interactions with the soil environment. We highlight selected milestones in understanding of root growth responses to water deficits, with emphasis on founding studies that have shaped current knowledge and set the stage for further investigation. We revisit the concept of integrated biophysical and metabolic regulation of plant growth, and utilize this framework to review central growth-regulatory processes occurring within root growth zones under water stress at sub-cellular to organ scales. Key topics include the primary processes of modifications of cell wall yielding properties and osmotic adjustment, as well as regulatory roles of abscisic acid and its interactions with other hormones. We include consideration of long-recognized responses for which detailed mechanistic understanding has been elusive until recently, for example hydrotropism, and identify gaps in knowledge, ongoing challenges and opportunities for future research.

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Protein kinase SnRK2.4 is a key regulator of aquaporins and root hydraulics in Arabidopsis

Cited by 6 publications

References 75 publications

Genome-Wide Identification and Expression Pattern Profiling of the Aquaporin Gene Family in Papaya (Carica papaya L.)

Genome-Wide Identification and Expression Pattern Profiling of the Aquaporin Gene Family in Papaya (Carica papaya L.)

Contrasting Regulation of Phaseolus vulgaris Root Hydraulic Properties Under Drought and Saline Conditions by Three Arbuscular Mycorrhizal Fungal Species From Soils with Divergent Moisture Regime

Not so hidden anymore: Advances and challenges in understanding root growth under water deficits

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