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'happy on norfluraz...
'happy on norflurazon' (hon) mutations implicate perturbance of plastid homeostasis with activating stress acclimatization and changing nuclear gene expression in norflurazon-treated seedlings
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Saini, G. (författare)
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Meskauskiene, R. (författare)
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Pijacka, W. (författare)
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Roszak, P. (författare)
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- Sjögren, Lars, 1977 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för växt- och miljövetenskaper,Department of Plant and Environmental Sciences
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- Clarke, Adrian K, 1964 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för växt- och miljövetenskaper,Department of Plant and Environmental Sciences
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Straus, M. (författare)
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Apel, K. (författare)
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(creator_code:org_t)
- 2011
- 2011
- Engelska.
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Ingår i: Plant Journal. - 0960-7412. ; 65:5, s. 690-702
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- P>Various mutant screens have been undertaken to identify constituents involved in the transmission of signals from the plastid to the nucleus. Many of these screens have been performed using carotenoid-deficient plants grown in the presence of norflurazon (NF), an inhibitor of phytoene desaturase. NF-treated plants are bleached and suppress the expression of nuclear genes encoding chloroplast proteins. Several genomes uncoupled (gun) mutants have been isolated that de-repress the expression of these nuclear genes. In the present study, a genetic screen has been established that circumvents severe photo-oxidative stress in NF-treated plants. Under these modified screening conditions, happy on norflurazon (hon) mutants have been identified that, like gun mutants, de-repress expression of the Lhcb gene, encoding a light-harvesting chlorophyll protein, but, in contrast to wild-type and gun mutants, are green in the presence of NF. hon mutations disturb plastid protein homeostasis, thereby activating plastid signaling and inducing stress acclimatization. Rather than defining constituents of a retrograde signaling pathway specifically associated with the NF-induced suppression of nuclear gene expression, as proposed for gun, hon mutations affect Lhcb expression more indirectly prior to initiation of plastid signaling in NF-treated seedlings. They pre-condition seedlings by inducing stress acclimatization, thereby attenuating the impact of a subsequent NF treatment.
Ämnesord
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Nyckelord
- retrograde signaling
- plastid homeostasis
- norflurazon
- hon mutants
- Arabidopsis
- chloroplast
- MG-PROTOPORPHYRIN IX
- DEPENDENT CLP PROTEASE
- ARABIDOPSIS-THALIANA
- SINGLET OXYGEN
- SIGNALING PATHWAYS
- TETRAPYRROLE BIOSYNTHESIS
- CHLOROPLAST DEVELOPMENT
- LEAF VARIEGATION
- MOLECULAR-BASIS
- MUTANT
- REVEALS
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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