Oxidative stress injury in tomato plants induced by supplemental UV-B radiation

Balakumar, T.; Gayathri, Balasubramaniam; Anbudurai, P. R.

doi:10.1023/a:1000388719570

Cited by 39 publications

(9 citation statements)

References 24 publications

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“…Previously, others suggested that lower PPO activity can preserve phenolic antioxidant levels. , Our data for both clones support the notion that the level of phenolic antioxidants is influenced by PPO activity, albeit in a different direction. But how might an increase in PPO activity lower the pool of available phenolic antioxidants in clone 347-14?…”

Section: Discussionsupporting

confidence: 89%

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Two Poplar Hybrid Clones Differ in Phenolic Antioxidant Levels and Polyphenol Oxidase Activity in Response to High Salt and Boron Irrigation

Nguyen

Cuellar

Mavi

et al. 2018

J. Agric. Food Chem.

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Poplar hybrids can be used for selenium (Se) and boron (B) phytoremediation under saline conditions. The phenolic antioxidant stress response of two salt and B tolerant poplar hybrids of parentage Populus trichocarpa × nigra × deltoides was studied using high-performance liquid chromatography (HPLC) and absorption-based assays to determine the antioxidant capacity, total phenolic content, hydroxycinnamic acid levels, and the enzyme activity of l-phenylalanine ammonia lyase (PAL), polyphenol oxidase (PPO), phenol peroxidase (POD), and laccase. Most remarkable was the contrasting response of the two poplar clones for PPO activity and phenolic levels to irrigation with high salt/B water. To cope with stressful growing conditions, only one clone increased its phenolic antioxidant level, and each clone displayed different PPO isoform patterns. Our study shows that poplar hybrids of the same parentage can differ in their salt/B stress coping mechanism.

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Section: Discussionsupporting

confidence: 89%

“…Notably, clone 345-1 exhibited a decline in PPO and POD activity upon high salt/B irrigation (Figure ). Low PPO and POD activity might enable plants to maintain high levels of phenolic compounds as part of a strong antioxidant stress response. ,, …”

Section: Discussionmentioning

confidence: 99%

Two Poplar Hybrid Clones Differ in Phenolic Antioxidant Levels and Polyphenol Oxidase Activity in Response to High Salt and Boron Irrigation

Nguyen

Cuellar

Mavi

et al. 2018

J. Agric. Food Chem.

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“…Also, phenol contents decreased with successive growth stage of bean plants after UV-B treatment (Singh et al, 2011). Whereas, Balakumar et al (1997) reported for increases in phenol content and a decreases in PPO activity in Licopersicon esculentum after UV-B treatment. It seems possible that oxidoreductases PPO and POX involved in phenol oxidation may play an important role as defense against UV-B oxidative stress.…”

Section: Oxidative Stressmentioning

confidence: 92%

Plant physiological responses to UV-B radiation

Zlatev

Lidon

Kaimakanova

2012

EJFA

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During the last few decades, there has been considerable concern over the depletion of stratospheric ozone as a result of anthropogenic pollutants. This has resulted in a concomitant increase in solar ultraviolet-B radiation (280-320 nm). High levels of UV-B radiation are responsible for multiple biologically harmful effects in both plants and animals. Many different plant responses to supplemental UV-B radiation have been observed, mostly injurious but sometimes beneficial. UV-B can influence plant processes either through direct damage or via various regulatory effects. In plants, direct effects include DNA damage, membrane changes and protein denaturation, which often cause heritable mutations affecting various physiological processes, including the photosynthetic apparatus. These could adversely affect plant growth, development and morphology, especially the productivity of sensitive crop species. This paper reviews the current knowledge about the plant physiological responses to UV-B stress.

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“…1). The polyphenol oxidases (PPO) catalyze the O 2 -dependent oxidation of phenols and are believed to be responsible for the oxidative browning occurring during plant senescence and injury (Balakumar et al 1997;Yao et al 2006b). Previous studies already suggest a putative involvement of antioxidant enzyme and endogenous antioxidant in the plant response to enhanced UV-B radiation (Casati and Andreo 2001), and our present work demonstrates for the first time that a dose-dependent response occurs in common buckwheat.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, as a result of long-term adaptation and evolution within its natural range, different cultivars of common buckwheat may exhibit contrasting levels of tolerance to UV-B. Although resistance to secondary oxidative stress induced by UV-B has been reported to play a key role in the whole plant response to UV-B (Balakumar et al 1997), no data are available in this respect for common buckwheat. In our study, three cultivars occurring in different UV-B exposure regions (one from Qinghai-Tibet plateau and two from lowland regions) were exposed to increasing UV-B radiation levels.…”

Section: Introductionmentioning

confidence: 99%

Intraspecific responses of Fagopyrum esculentum to enhanced ultraviolet B radiation

Yao

Yang

et al. 2008

Plant Growth Regul

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The effects of supplemental UV-B radiation on crop growth, morphology, reproduction and physiology were studied in three cultivars of Fagopyrum esculentum Moench (buckwheat) originating from high elevation (Qinghai-Tibet plateau) and lower altitudes (The Sichuan Basin). Our results showed that common buckwheat was sensitive to UV-B stress. Plant growth, development, and reproduction were inhibited by elevated UV-B radiation. Plant lipid oxidation and polyphenol oxidase (PPO) activity increased with increasing UV-B radiation, along with the concentration of phenylpropanoid compounds, superoxide dismutase (SOD) activity and ascorbic acid (Asa) concentration were also enhanced at the lowest level of supplemental UV-B radiation but decreased at the higher level of enhanced UV-B. While, a cultivar originating from elevated locations had lower dry matter accumulation and was more tolerant to UV-B radiation than cultivars originating from lower elevations. The effects on leaf thickness and increased antioxidant capacity could be linked with the improved performance of cultivar originating from high elevation when exposed to enhanced UV-B radiation. We conclude that UV-B tolerance should be considered prior to introducing or breeding common buckwheat cultivars from lowland cultivation to regions at high elevation such as the Qinghai-Tibet plateau.

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Oxidative stress injury in tomato plants induced by supplemental UV-B radiation

Cited by 39 publications

References 24 publications

Two Poplar Hybrid Clones Differ in Phenolic Antioxidant Levels and Polyphenol Oxidase Activity in Response to High Salt and Boron Irrigation

Two Poplar Hybrid Clones Differ in Phenolic Antioxidant Levels and Polyphenol Oxidase Activity in Response to High Salt and Boron Irrigation

Plant physiological responses to UV-B radiation

Intraspecific responses of Fagopyrum esculentum to enhanced ultraviolet B radiation

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