High root temperature affects the tolerance to high light intensity in Spathiphyllum plants

Soto, Adriana; Hernández, Luis Fernando García; Quiles, Marı́a José

doi:10.1016/j.plantsci.2014.07.004

Cited by 9 publications

(6 citation statements)

References 56 publications

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“…Visible damage and complete blockage of both LEF and CEF occurred in rice when only stem, but not root temperature was lowered ( Suzuki et al, 2011 ). Furthermore, this condition has been shown to upregulate both NDH complex and the plastid terminal oxidase contents in a tropical plant Spathiphyllum wallisii , whereas upregulation of the PGR5–PGRL1 – dependent CEF as well as that of the PGR5 levels were observed either when entire plant was chilled ( Segura and Quiles, 2015 ), or when roots were chilled but stems heated ( Soto et al, 2014 ).…”

Section: Involvement Of Cef Upon Drought and Extreme Temperaturesmentioning

confidence: 99%

Cyclic electron flow provides acclimatory plasticity for the photosynthetic machinery under various environmental conditions and developmental stages

Suorsa

2015

Front. Plant Sci.

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Photosynthetic electron flow operates in two modes, linear and cyclic. In cyclic electron flow (CEF), electrons are recycled around photosystem I. As a result, a transthylakoid proton gradient (ΔpH) is generated, leading to the production of ATP without concomitant production of NADPH, thus increasing the ATP/NADPH ratio within the chloroplast. At least two routes for CEF exist: a PROTON GRADIENT REGULATION5–PGRL1–and a chloroplast NDH-like complex mediated pathway. This review focuses on recent findings concerning the characteristics of both CEF routes in higher plants, with special emphasis paid on the crucial role of CEF in under challenging environmental conditions and developmental stages.

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Section: Involvement Of Cef Upon Drought and Extreme Temperaturesmentioning

confidence: 99%

Cyclic electron flow provides acclimatory plasticity for the photosynthetic machinery under various environmental conditions and developmental stages

Suorsa

2015

Front. Plant Sci.

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“…Similar to heat and drought, HL treatment stimulates chlororespiration in higher plants [48] and microalgae [20], causing the up-regulation of the PTOX and the thylakoidal NADH DH complex [49,50]. The natural astaxanthin mainly derives from the microalgae producer, Haematococcus.…”

Section: The Differential Expression Patterns and The Complementary Rmentioning

confidence: 99%

Plastid terminal oxidases in Chlamydomonas: connections with astaxanthin and bio-hydrogen production

Li¹,

Zheng²,

Xiao³

et al. 2020

Preprint

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Background: as a plasto quinol oxidase involved in plastoquinol oxidation in higher plants and microalgae, the plastid terminal oxidase (PTOX) was first recognized in the tomato mutant GHOST (GH) and Arabidopsis mutant IMMUTANS (IM). Genome sequence analysis revealed that duplication of the PTOX gene occurs in certain eukaryotic microalgae, but not in cyanobacteria and most higher plants. PTOX may also be involved in carotenoid synthesis and play a critical protective role against stress, such as high light, heat shock and hyperosmosis. However, the connections of PTOX with astaxanthin and bio-hydrogen production and their functional relationship between two PTOX genes in the model green microalga Chlamydomonas is unknown. Results: we successfully knocked down two ptoxs through RNAi in Chlamydomonas, respectively. We demonstrated that expression levels of both PTOXs were increased under stress conditions, and interestingly when one PTOX was silenced the other’s transcriptional level was significantly raised. Conclusions: this shows a complementary relationship under high light condition. In addition, the astaxanthin accumulation level was up-regulated in silenced ptox2 strain, compared to the wide type strain. What’s more, significantly increased hydrogen production was observed in silenced ptox1 strain. In conclusion, PTOXs in Chlamydomonas are connected with not only astaxanthin accumulation but also hydrogen production, and their knock-down strains provide new insights in manipulating microalgae for high light stress tolerant strains, carotenoid production and even biofuels.

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“…The minimal fluorescence yield (F0) and maximal fluorescence yield (Fm) were measured by applying measuring light source (<0.5 μmol·m -2 ·s -1 ) and saturating light pulse of 5,000 μmol·m -2 ·s -1 (Soto et al, 2014). Finally we obtained the following parameters: Fm, the effective PSII quantum yield (YII), the photosynthetic electron transport rate (ETR), the photochemical quenching (qP), the non-photochemical quenching (NPQ).…”

Section: Chlorophyll Fluorescence Measurementsmentioning

confidence: 99%

Effects of Drought Stress on Chlorophyll Fluorescence in Tomato

Zhang¹,

Liu²,

Zhao³

et al. 2017

mpb

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Effects of drought stress on chlorophyll fluorescence in tomato, Molecular Plant Breeding, 8(7): 65-69 (doi: 10.5376/mpb.2017.08.0007) Abstract Drought stress is one of the most important abiotic stresses, which greatly influences the photosynthesis of plants. The present study aimed to determine effects of drought stress to chlorophyll fluorescence parameters on tomato seedlings. In this paper, tomato seedlings were treated for 3, 6, 12 or 24 h by polyethylene glycol 6000 (PEG 6000) to simulate the drought stress. The effects of drought stress on chlorophyll fluorescence characteristics of tomato leaves and the characteristics of chlorophyll fluorescence parameters were analyzed by IMAGING-PAM modulated chlorophyll fluorescence in order to provide theoretical basis for tomato cultivation and breeding. The results showed that 1) the FM value of tomato seedlings after drought treatment was significantly lower than that without drought treatment about declined by 9.7%. 2) The value of Y (II) initially increased slightly and then decline eventually leveling off trend with the increasing of drought treatment time.3) The ETR value was lower under drought stress than control check, especially when the drought stress treatment time up to 6 to 12 hours, the ETR value drops sharply, then increased slightly. 4) qP decreased from 0.646 to 0.4013 under the drought stress, which reflects the ability of oxidation of QA weakened, namely electron transfer activity of PS II decreased. 5) 15% PEG 6000 simulated drought stress treatment induced qN increased significantly.

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High root temperature affects the tolerance to high light intensity in Spathiphyllum plants

Cited by 9 publications

References 56 publications

Cyclic electron flow provides acclimatory plasticity for the photosynthetic machinery under various environmental conditions and developmental stages

Cyclic electron flow provides acclimatory plasticity for the photosynthetic machinery under various environmental conditions and developmental stages

Plastid terminal oxidases in Chlamydomonas: connections with astaxanthin and bio-hydrogen production

Effects of Drought Stress on Chlorophyll Fluorescence in Tomato

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