Plastid Signals Confer Arabidopsis Tolerance to Water Stress

Cheng, Jian; He, C.-X.; Zhang, Z.-W.; Xu, Fengming; Zhang, D.-W.; Wang, X.; Yuan, Shu; Lin, Honghui

doi:10.5560/znc.2011.66c0047

Cited by 12 publications

(13 citation statements)

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“…Mutants result from the defect in plastid signalling acclimates less efficiently towards environmental stresses in comparison to wild type. The gun3 , gun5 , gun1 , and abi4 (Arabidopsis abcissic acid locus 4) auxotrophs exhibit more damage due to oxidative stress than Col‐0(Arabidopsis: Columbia) plant exhibiting water stress (Cheng et al, ). The gun1 auxotroph exhibits photo‐bleaching property when both increased light intensity and norflurazon applied together (Zhang et al, ).…”

Section: Role Of Mg‐protoix and Mg‐protoix‐signalling Componentsmentioning

confidence: 99%

“…The gun1 auxotroph exhibits photo‐bleaching property when both increased light intensity and norflurazon applied together (Zhang et al, ). Pretreatment of norflurazon increased tolerance of plants towards environmental stresses by enhancing the gene expression of antioxidant enzymes (Cheng et al, ; Tang et al, ; Zhang et al, , ). The gun1 mutant has impaired basal drought tolerance, whereas the gun1 , abi4 , mutants hindered norflurazon‐induced drought tolerance (Zhang et al, ).…”

Section: Role Of Mg‐protoix and Mg‐protoix‐signalling Componentsmentioning

confidence: 99%

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Haem oxygenase: A functionally diverse enzyme of photosynthetic organisms and its role in phytochrome chromophore biosynthesis, cellular signalling and defence mechanisms

Mahawar

Shekhawat

2018

Plant Cell & Environment

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Haem oxygenase (HO) is a universal enzyme that catalyses stereospecific cleavage of haem to BV IX α and liberates Fe ion and CO as by-product. Beside haem degradation, it has important functions in plants that include cellular defence, stomatal regulation, iron mobilization, phytochrome chromophore synthesis, and lateral root formation. Phytochromes are an extended family of photoreceptors with a molecular mass of 250 kDa and occur as a dimer made up of 2 equivalent subunits of 125 kDa each. Each subunit is made of two components: the chromophore, a light-capturing pigment molecule and the apoprotein. Biosynthesis of phytochrome (phy) chromophore includes the oxidative splitting of haem to biliverdin IX by an enzyme HO, which is the decisive step in the biosynthesis. In photosynthetic organisms, BVα is reduced to 3Z PΦB by a ferredoxin-dependent PΦB synthase that finally isomerised to PΦB. The synthesized PΦB assembles with the phytochrome apoprotein in the cytoplasm to generate holophytochrome. Thus, necessary for photomorphogenesis in plants, which has confirmed from the genetic studies, conducted on Arabidopsis thaliana and pea. Besides the phytochrome chromophore synthesis, the review also emphasises on the current advances conducted in plant HO implying its developmental and defensive role.

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Section: Role Of Mg‐protoix and Mg‐protoix‐signalling Componentsmentioning

confidence: 99%

Section: Role Of Mg‐protoix and Mg‐protoix‐signalling Componentsmentioning

confidence: 99%

Haem oxygenase: A functionally diverse enzyme of photosynthetic organisms and its role in phytochrome chromophore biosynthesis, cellular signalling and defence mechanisms

Mahawar

Shekhawat

2018

Plant Cell & Environment

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“…The AT5G08670 mutant is a genomes uncoupled (gun)mutant Retrograde signaling is triggered when plastid gene expression (PGE) is disrupted at the transcriptional or translational levels (Woodson & Chory, 2008). Inhibition of PGE causes changes in the expression ofPhANG and the LIGHT-HARVESTING CHLOROPHYLL A/B-BINDING(LHCB ) genes (Zhang et al, 2011). When WT seedlings are exposed to the plastid development inhibitors norflurazon (NF) and lincomycin (LIN), plastid retrograde signaling is induced (Strand et al, 2003).…”

Section: ισολατιον σεχυενςε αναλψσις ανδ λοςαλιζατιον οφ μιτοςηονδρια...mentioning

confidence: 99%

“…Whereas GUN1 encodes a chloroplast nucleoid pentatricopeptide repeat protein (Koussevitzky, 2007), the other GUN proteins are involved in the tetrapyrrole biosynthetic pathway.GUN2 encodes a heme oxygenase (Strand et al, 2003), GUN3 encodes a photosensitive pigment chromophore synthase (Susek et al, 1993), GUN4 encodes a regulatory protein involved in chlorophyll synthesis (Larkin et al, 2003), and GUN5 encodes the H subunit of magnesium chelatase (Mochizuki et al, 2001). GUN1 might also play a role in the tetrapyrrole pathway (Cheng et al, 2011). Because these GUN proteins are located in the chloroplast, they play a direct role in the retrograde chloroplast signaling pathway (Surpin, Larkin, & Chory, 2002).…”

Section: Mitochondrial Proteins Contribute To Plastid Retrograde Sign...mentioning

confidence: 99%

Mitochondrial ATP synthase activity affects plastid retrograde signaling in Arabidopsis

Sun

Líu

Liu

et al. 2022

Preprint

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Plastid retrograde signaling plays a key role in coordinating the expression of plastid genes and photosynthesis-associated nuclear genes ( PhANGs). Although plastid retrograde signaling can be substantially compromised by mitochondrial dysfunction, it is not yet clear whether specific mitochondrial factors are required to regulate plastid retrograde signaling. Here, we show that mitochondrial ATP synthase β-subunit mutants with decreased ATP synthase activity are impaired in plastid retrograde signaling. Transcriptome analysis revealed that the expression levels of PhANGs were significantly higher in seedlings affected in AT5G08670, the gene of the β-subunit of mitochondrial ATP synthase than in wild-type (WT) seedlings upon treatment with lincomycin (LIN) and norflurazon (NF). Further studies showed that the expression of nuclear genes involved in chloroplast and mitochondrial retrograde signaling was affected in AT5G08670 mutant seedlings treated with LIN. These changes might be associated with the repression of some transcriptional factors (TFs), such as ARF3/ETTIN ( ETT), PLASTID TRANSCRIPTION FACTOR 1 ( PTF1), CYCLOIDEA AND PCF TRANSCRIPTION FACTOR 2 ( TCP2), and KOW DOMAIN-CONTAINING TRANSCRIPTION FACTOR 1 ( KTF1). These findings indicate that the activity of mitochondrial ATP synthase affects plastid retrograde signaling.

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“…Mg-Proto-IX-synthesis mutant gun5 and Mg-Proto-IX-signaling mutants gun1 and abi4 had impaired basal high-temperature-tolerance ( Miller et al, 2007 ) and cold-tolerance ( Tang et al, 2014 ). The gun5 , gun1 and abi4 mutants had more oxidative damages than the wild-type plants under water stress ( Cheng et al, 2011 ). The gun1 mutant had impaired drought-tolerance ( Zhang et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Mg-Protoporphyrin IX Signals Enhance Plant’s Tolerance to Cold Stress

Zhang

Feng

et al. 2016

Front. Plant Sci.

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The relationship between Mg-protoporphyrin IX (Mg-Proto IX) signals and plant’s tolerance to cold stress is investigated. Arabidopsis seedlings grown for 3 weeks were pretreated with 2 mM glutamate (Glu) and 2 mM MgCl2 for 48 h at room temperature to induce Mg-Proto IX accumulation. Then cold stress was performed at 4°C for additional 72 h. Glu + MgCl2 pre-treatments alleviated the subsequent cold stress significantly by rising the leaf temperature through inducing Mg-Proto IX signals. The protective role of Glu + MgCl2 treatment was greatly compromised in the mutants of Mg-Proto IX synthesis, Mg-Proto IX signaling, and cyanide-resistant respiration. And the enhancement of cold-responsive gene expression was greatly compromised in the mutants of Mg-Proto IX synthesis, Mg-Proto IX signaling and ABA signaling, but not in the mutant of cyanide-resistant respiration. Cold stress promoted cyanide-resistant respiration and leaf total respiration exponentially, which could be further induced by the Glu + MgCl2 treatment. Mg-Proto IX signals also activate antioxidant enzymes and increase non-enzymatic antioxidants [glutathione but not ascorbic acid (AsA)] to maintain redox equilibrium during the cold stress.

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Plastid Signals Confer Arabidopsis Tolerance to Water Stress

Cited by 12 publications

References 0 publications

Haem oxygenase: A functionally diverse enzyme of photosynthetic organisms and its role in phytochrome chromophore biosynthesis, cellular signalling and defence mechanisms

Haem oxygenase: A functionally diverse enzyme of photosynthetic organisms and its role in phytochrome chromophore biosynthesis, cellular signalling and defence mechanisms

Mitochondrial ATP synthase activity affects plastid retrograde signaling in Arabidopsis

Mg-Protoporphyrin IX Signals Enhance Plant’s Tolerance to Cold Stress

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