Perturbed porphyrin biosynthesis contributes to differential herbicidal symptoms in photodynamically stressed rice (Oryza sativa) treated with 5-aminolevulinic acid and oxyfluorfen

Phung, Thu-Ha; Jung, Sunyo

doi:10.1016/j.pestbp.2014.10.002

Cited by 13 publications

(19 citation statements)

References 66 publications

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“…In contrast to other ROS-scavenging genes, transcript levels of CatC decreased greatly 2 days after ALA and OF treatment. The prominent up-regulation of CatA, CatB, APXa, and APXb as well as the increased activities of hemoproteins, such as APX, CAT, and POD are in agreement with the up-regulation of FC2 (Fe-Chelatase2) which is involved in heme synthesis under the photodynamic stress [6]. The balance between ROS production and antioxidant enzyme activities determines whether oxidative signaling or damage will occur [27].…”

Section: Effect Of Ala and Oxyfluorfen On Cellular Redox State And Acmentioning

confidence: 61%

“…1A). Brown necrosis in OF-treated plants resulted from the effect of peroxidation due to the great accumulation of Proto IX in cytoplasm and plasma membrane, whereas photodynamic degradation via abnormal accumulation of Proto IX and Pchlide in chloroplasts caused white necrosis due to bleaching effect in ALA-treated plants [6]. When expose to light, these excess porphyrins were photosensitized [3,7,8].…”

Section: Altered Oxidative Metabolism In Rice Plants Treated With Alamentioning

confidence: 99%

“…1C) may be resulted from bleaching due to the greater photodynamic degradation of porphyrin intermediates [6], compared to OF-treated plants. Under photodynamic stress imposed by ALA and OF, tight control of porphyrin biosynthesis prevented accumulation of toxic metabolic intermediates by down-regulation of their biosynthesis, but largely by photodynamic degradation [6], thereby alleviating photodynamic damage. However, this regulatory mechanism of porphyrin metabolism is not sufficient to overcome the photodynamic stress, and thus the plants necessitate other components of protective process.…”

Section: Altered Oxidative Metabolism In Rice Plants Treated With Alamentioning

confidence: 99%

“…In our previous study, rice plants treated with ALA or OF exhibited different herbicidal symptoms as characterized by white and brown necrosis, respectively, resulted from differentially perturbed porphyrin biosynthesis [6]. In this study, we attempted to clarify differential responses not only in oxidative status, but also in molecular mechanisms of antioxidant system between the two different types of photodynamic stress, white and brown necrosis.…”

Section: Introductionmentioning

confidence: 99%

“…ALA applied at high concentrations acts as porphyrin deregulator because of abnormal accumulation of porphyrin intermediates which severely damaged treated plants when exposed to light [5,6]. Oxyfluorfen (OF) is an inhibitor of protoporphyrinogen oxidase (PPO) which catalyzes the step leading to the formation of Proto IX from protoporphyrinogen IX (Protogen IX) [7].…”

Section: Introductionmentioning

confidence: 99%

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Differential antioxidant defense and detoxification mechanisms in photodynamically stressed rice plants treated with the deregulators of porphyrin biosynthesis, 5-aminolevulinic acid and oxyfluorfen

Phung

Jung

2015

Biochemical and Biophysical Research Communications

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Section: Effect Of Ala and Oxyfluorfen On Cellular Redox State And Acmentioning

confidence: 61%

Section: Altered Oxidative Metabolism In Rice Plants Treated With Alamentioning

confidence: 99%

Section: Altered Oxidative Metabolism In Rice Plants Treated With Alamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Differential antioxidant defense and detoxification mechanisms in photodynamically stressed rice plants treated with the deregulators of porphyrin biosynthesis, 5-aminolevulinic acid and oxyfluorfen

Phung

Jung

2015

Biochemical and Biophysical Research Communications

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Altered tetrapyrrole metabolism and transcriptome during growth-promoting actions in rice plants treated with 5-aminolevulinic acid

2015

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As a precursor of chlorophyll, 5-aminolevulinic acid (ALA) acts as a growth-promoting factor in plants, but little is known of molecular basis of plant growth action. The exogenous supply of an optimal concentration of 75 lM ALA without photooxidative risks, as indicated by a negligible change in conductivity, increased dry shoot biomass of rice up to 16 % after 10 days of ALA treatment, compared to the untreated control. Although rice plants treated with ALA gradually increased levels of ALA-synthesizing capacity during 30 h of the treatment, a noticeable increase in chlorophyll content was not observed. Levels of protoporphyrin IX and Mg-porphyrins were not significantly changed 6 h after ALA treatment and then decreased 30 h after the treatment, while transcript levels of most biosynthetic genes in tetrapyrrole pathway almost kept constant or slightly decreased. In microarray analysis of ALA-treated rice plants, categories of significantly upregulated transcripts highlight particular biological processes involved in cell cycle, transcription factors, posttranscriptional regulation, and metabolisms of macromolecules. Our results demonstrate that the regulation of tetrapyrrole biosynthesis did not contribute significantly to growth enhancement in ALA-treated rice. We propose that the elevated status of ALA in plant cells alters the transcriptional control of genes involved in physiological processes vital for plant growth, thereby contributing to enhancement of plant biomass.

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5-Aminolevulinic acid (ALA) biosynthetic and metabolic pathways and its role in higher plants: a review

Liao

Dawuda

et al. 2018

Plant Growth Regul

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Crop productivity is restricted by various abiotic stresses such as drought, salinity, heat, and cold. Many efforts have been taken to decrease the inhibition of plant growth by alleviating the abiotic stresses. Exogenous applications of hormones, plant growth regulators, and/or small signaling molecules have been reported as a means to enhance plant resistance to stress. One of the small signaling molecules utilized is 5-aminolevulinic acid (ALA) that has been shown to enhance plant growth under abiotic stress. As a metabolic intermediate in higher plants, ALA is a precursor of all tetrapyrroles such as chlorophyll, heme and siroheme. The pathway towards biosynthesis upstream and the metabolism downstream of ALA contains multiple regulatory points that are affected by positive/negative factors. However, report about the regulatory aspects of the ALA metabolic pathway and the role of ALA in stimulating physiochemical processes in higher plants under stress have not been collated and summarized systematically. In this regard, we summarize recent developments in understanding the mechanisms of plant responses to abiotic stress which are affected by ALA as well as new information on the metabolic pathway of ALA. We find that exogenous application of ALA can enhance some key physiological and biochemical processes in plants such as photosynthesis, nutrient uptake, antioxidant characteristics and osmotic equilibrium, however, more in-depth research on the specific mechanisms are needed.

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Perturbed porphyrin biosynthesis contributes to differential herbicidal symptoms in photodynamically stressed rice (Oryza sativa) treated with 5-aminolevulinic acid and oxyfluorfen

Cited by 13 publications

References 66 publications

Differential antioxidant defense and detoxification mechanisms in photodynamically stressed rice plants treated with the deregulators of porphyrin biosynthesis, 5-aminolevulinic acid and oxyfluorfen

Differential antioxidant defense and detoxification mechanisms in photodynamically stressed rice plants treated with the deregulators of porphyrin biosynthesis, 5-aminolevulinic acid and oxyfluorfen

Altered tetrapyrrole metabolism and transcriptome during growth-promoting actions in rice plants treated with 5-aminolevulinic acid

5-Aminolevulinic acid (ALA) biosynthetic and metabolic pathways and its role in higher plants: a review

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