A Potassium-Dependent Oxygen Sensing Pathway Regulates Plant Root Hydraulics

Shahzad, Zaigham; Canut, Matthieu; Tournaire-Roux, Colette; Martinière, Alexandre; Boursiac, Yann; Loudet, Olivier; Maurel, Christophe

doi:10.1016/j.cell.2016.08.068

Cited by 78 publications

(72 citation statements)

References 35 publications

(52 reference statements)

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“…Similarly, although Bra-botrytis-RAP2-12, Bra-botrytis-RAP2-4a , and Bra-botrytis-RAP2-10a showed fast responses to drought stress, the expression of these TFs was inhibited in the early stages of salt stress. RAP2.12 , the homologous gene of Bra-botrytis-RAP2-12 , played a vital role in anaerobic response and was involved in the root hydraulics of Arabidopsis (Gasch et al, 2016; Paul et al, 2016; Shahzad et al, 2016). RAP2.4 , the homolog of Bra-botrytis-RAP2-4a , was involved in drought stress tolerance in Arabidopsis (Lin et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Genome-Wide Identification of AP2/ERF Transcription Factors in Cauliflower and Expression Profiling of the ERF Family under Salt and Drought Stresses

Wang

et al. 2017

Front. Plant Sci.

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The AP2/ERF transcription factors (TFs) comprise one of the largest gene superfamilies in plants. These TFs perform vital roles in plant growth, development, and responses to biotic and abiotic stresses. In this study, 171 AP2/ERF TFs were identified in cauliflower (Brassica oleracea L. var. botrytis), one of the most important horticultural crops in Brassica. Among these TFs, 15, 9, and 1 TFs were classified into the AP2, RAV, and Soloist family, respectively. The other 146 TFs belong to ERF family, which were further divided into the ERF and DREB subfamilies. The ERF subfamily contained 91 TFs, while the DREB subfamily contained 55 TFs. Phylogenetic analysis results indicated that the AP2/ERF TFs can be classified into 13 groups, in which 25 conserved motifs were confirmed. Some motifs were group- or subgroup- specific, implying that they are significant to the functions of the AP2/ERF TFs of these clades. In addition, 35 AP2/ERF TFs from the 13 groups were selected randomly and then used for expression pattern analysis under salt and drought stresses. The majority of these AP2/ERF TFs exhibited positive responses to these stress conditions. In specific, Bra-botrytis-ERF054a, Bra-botrytis-ERF056, and Bra-botrytis-CRF2a demonstrated rapid responses. By contrast, six AP2/ERF TFs were showed to delay responses to both stresses. The AP2/ERF TFs exhibiting specific expression patterns under salt or drought stresses were also confirmed. Further functional analysis indicated that ectopic overexpression of Bra-botrytis-ERF056 could increase tolerance to both salt and drought treatments. These findings provide new insights into the AP2/ERF TFs present in cauliflower, and offer candidate AP2/ERF TFs for further studies on their roles in salt and drought stress tolerance.

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Section: Discussionmentioning

confidence: 99%

Genome-Wide Identification of AP2/ERF Transcription Factors in Cauliflower and Expression Profiling of the ERF Family under Salt and Drought Stresses

Wang

et al. 2017

Front. Plant Sci.

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“…Approximately 16% of fertile land worldwide is affected by soil waterlogging, resulting in crop yield reductions of up to 80% [2]. Plants can survive in low oxygen (O 2 ) environments through the activation of diverse molecular, metabolic, and physiological responses [3], such as decreases in cellular energy change, a drop in cytoplasmic pH, enhanced aerenchyma formation, stem elongation, the use of gas films around submerged leaves, and the accumulation of toxic end-products from anaerobic respiration and reactive oxygen species (ROS) [4, 5]. Plant growth, flash and dry matter accumulation are significantly depressed by root zone oxygen deficiency [6].…”

Section: Introductionmentioning

confidence: 99%

The effect of exogenous calcium on cucumber fruit quality, photosynthesis, chlorophyll fluorescence, and fast chlorophyll fluorescence during the fruiting period under hypoxic stress

et al. 2018

BMC Plant Biol

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BackgroundPlants often suffer from hypoxic stress during waterlogging and hydroponic culturing. This study investigated the response of cucumber (Cucumis sativus L.) plant growth parameters, leaf photosynthesis, chlorophyll fluorescence, fast chlorophyll a fluorescence transient (OJIP), and fruit quality parameters to hypoxic stress alleviated by exogenous calcium. During the fruiting period, cucumber plants were exposed to hypoxia and hypoxia + Ca2+ treatment (4 mM Ca2+) for 9 d.ResultExogenous calcium application enhanced the biomass and fruit quality of hypoxic stressed cucumber and also increased the net photosynthesis rate, stomatal conductance, intercellular CO2 concentration, maximum quantum efficiency of photosystem II photochemistry, actual photochemical efficiency of PSII, photochemical quenching coefficient, and non-photochemical quenching coefficient. Additionally, measurement of chlorophyll a fluorescence transients showed the positive K- and L-bands were more pronounced in leaves treated with hypoxia compared with those with hypoxia + Ca2+, indicating that hypoxic treatment induced uncoupling of the oxygen-evolving complex and inhibited electron transport beyond plastoquinone pool (Qa, Qb) including possible constraints on the reduction of end electron acceptors of photosystem I. Exogenous calcium can reduce these stress-induced damages in cucumber.ConclusionThis research focused the effect of exogenous calcium on cucumber photosynthesis during the fruiting period under hypoxic stress. Hypoxic stress might impair the photosynthetic electron-transport chain from the donor side of PSII up to the reduction of end acceptors of PSI, and exogenous calcium enhanced electron transport capacity and reduced hypoxic damage of cucumber leaves.

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“…In addition, interactions between mineral nutrients and soil oxygen availability in the soil solution and nutrient availability (P and Fe) in a genotype are starting to emerge. Recent study demonstrated that plant root hydraulics is regulated by a potassium-dependent O 2 sensing pathway in the model plant Arabidopsis thaliana [17]. A molecular pathway involving Hydraulic Conductivity of Root 1 and the transcription factor RAP2 was proposed as a relevant target for improving the resilience of plants to flooding.…”

Section: Discussionmentioning

confidence: 99%

Phosphorus and Iron Deficiencies Influences Rice Shoot Growth in an Oxygen Dependent Manner: Insight from Upland and Lowland Rice

Mongon

Chaiwong

Bouain

et al. 2017

IJMS

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Abstract:Rice is the main staple crop for one-third of the world population. To maximize yields, large quantities and constant input of fertilizers containing essential nutrients such as phosphorus (P) and iron (Fe) are added. Rice can germinate in both aerobic and anaerobic conditions, but the crosstalk between oxygen (O 2 ) and nutrients such as P and Fe on plant growth remains obscure. The aim of this work was to test whether such interactions exist, and, if so, if they are conserved between up-and lowland rice varieties. To do so, we assessed shoot and root biomass as well as inorganic phosphate (Pi) accumulation in four rice varieties, including two lowland rice varieties Nipponbare and Suphanburi 1 (SPR1) (adapted to non-aerated condition) and two upland rice varieties CMU122 and Sew Mae Jun (SMJ) (adapted to aerated condition) under various conditions of Pi and/or Fe deficiencies, in aerated and non-areated solution. Under these different experimental conditions, our results revealed that the altered shoot biomass in Nipponbare and SPR1 was O 2 -dependent but to a lesser extent in CMU122 and SMJ cultivars. In this perspective, discovering the biological significance and molecular basis of these mineral elements and O 2 signal interaction is needed to fully appreciate the performance of plants to multiple environmental changes.

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A Potassium-Dependent Oxygen Sensing Pathway Regulates Plant Root Hydraulics

Cited by 78 publications

References 35 publications

Genome-Wide Identification of AP2/ERF Transcription Factors in Cauliflower and Expression Profiling of the ERF Family under Salt and Drought Stresses

Genome-Wide Identification of AP2/ERF Transcription Factors in Cauliflower and Expression Profiling of the ERF Family under Salt and Drought Stresses

The effect of exogenous calcium on cucumber fruit quality, photosynthesis, chlorophyll fluorescence, and fast chlorophyll fluorescence during the fruiting period under hypoxic stress

Phosphorus and Iron Deficiencies Influences Rice Shoot Growth in an Oxygen Dependent Manner: Insight from Upland and Lowland Rice

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