Thiourea mediates alleviation of UV-B stress-induced damage in the Indian mustard (<i>Brassica juncea</i>L.)

Pandey, Manish K.; Srivastava, Ashish Kumar; Suprasanna, Penna; D’Souza, S.F.

doi:10.1080/17429145.2011.561934

Cited by 14 publications

(12 citation statements)

References 36 publications

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“…Fresh weight and length of shoots ( Figure 1) and photosynthetic pigments ( Figure 2A) were significantly decreased by the UV-B treatment. This was expected since similar effects were established previously in pea, wheat, bean, and Indian mustard plants (Alexieva et al, 2001;Singh et al, 2011;Li et al, 2012;Pandey et al, 2012). Additionally, when Biomin was added to the nutrient medium, the harmful effects of UV-B decreased.…”

Section: Discussionsupporting

confidence: 79%

Biochemical responses of triticale plants treated with UV-B irradiation and nutrient solution enriched with humic acids

Todorova

Sergiev²,

Moskova³

et al. 2014

Turk J Bot

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A natural substance extracted from coal with humic acids as its active ingredients, namely Biomin, was added to nutrient medium and applied to triticale roots 3 days prior to UV-B irradiation treatment. UV-B treatment increased malondialdehyde and anthocyanin contents and the activities of peroxidase and superoxide dismutase, while it decreased chlorophyll content, fresh weight, and shoot length. Catalase and total phenolics content did not change in UV-B-treated shoots. The pretreatment with Biomin showed favorable effects on growth, decreased the oxidative damage provoked by UV-B irradiation, increased the content of UV-B-absorbing compounds, and positively influenced enzymatic activities. The application of Biomin on triticale plants was beneficial for counteracting the UV-B-induced oxidative stress by increasing the content of nonenzymatic antioxidants and antioxidant enzyme activities involved in detoxification of reactive oxygen species.

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Section: Discussionsupporting

confidence: 79%

Biochemical responses of triticale plants treated with UV-B irradiation and nutrient solution enriched with humic acids

Todorova

Sergiev²,

Moskova³

et al. 2014

Turk J Bot

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“…Among the physiological effects, exogenously applied thiourea increased the photosystem-I and II activities in wheat under no stress condition (Nathawat et al, 2007) as well as under reduced water availability in wheat . In Indian mustard, foliar spray of thiourea improved the synthesis of anthocyanins, flavonoids and phenolic compounds leading to a lesser damage to leaf chlorophyll contents under UV-B stress (Pandey et al, 2012). Thiourea spray enhanced the source strength and sucrose export to the developing reproductive organs in B. juncea (Pandey et al, 2013).…”

Section: Some Mechanisms Of Thiourea Actionmentioning

confidence: 99%

Thiourea: A Molecule with Immense Biological Significance for Plants

Wahid

Basra

Farooq

2017

IJAB

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To cite this paper: Wahid, A., S.M.A. Basra and M. Farooq, 2017. Thiourea: a molecule with immense biological significance for plants. Int. J. Agric. Biol., AbstractThiourea, also chemically named as Thiocarbamide, is a nitrogen and sulfur containing compound. It has three functional groups, amino, imino and thiol, each with important biological roles. Thiourea is being increasingly used to improve plant growth and productivity under normal and stressful conditions. Use of thiourea as seed priming agent, foliar spray or medium supplementation is more effective under environmental stress than under normal conditions. When used as seed pretreatment, thiourea increased the seed germination; while application as foliar spray improved the gas exchange properties and when used as medium supplementation, it improved the root growth and its proliferation. This indicates that thiourea is more effective in the tissues where it is applied. Although to a differential extent, thiourea is effective in improving plant growth and development under drought, salinity, heat stress and heavy metal toxicity. At physiological level, it improves the leaf gas exchange, nutrient acquisition by the root and assimilation thereafter. At biochemical level, exogenously applied thiourea improves the sugar metabolism and enhances the proteins biosynthesis. At molecular level, thiourea application modulates the pattern of gene expression regardless of the stress applied. Signaling of gene expression is a likely mechanism induced by thiourea. In a nutshell, even though considerable advancement has been made in understanding the biological roles of thiourea in modulating different mechanisms in plants, thiourea needs to be explored further for its biological roles in plants than the relevant information available thus far.

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“…The rationale behind the selection of TU was based upon the fact that most of the steps for generating of photoassimilates at source and its translocation towards sink are regulated in a redox state dependent manner [16]. An additional support to this was derived from our previous findings, where the positive role of TU has been demonstrated for enhancing sucrose translocation [17] and for ameliorating salt [18], [19] as well as UV stress [20] in Brassica juncea . The outcome of this research not only highlights the significance of redox mediated regulation between source and sink, but also proposes the use of TU, as a bioregulatory agent, for enhancing crop productivity under field conditions.…”

Section: Introductionmentioning

confidence: 95%

Thiourea, a ROS Scavenger, Regulates Source-to-Sink Relationship to Enhance Crop Yield and Oil Content in Brassica juncea (L.)

et al. 2013

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In the present agricultural scenario, the major thrust is to increase crop productivity so as to ensure sustainability. In an earlier study, foliar application of thiourea (TU; a non physiological thiol based ROS scavenger) has been demonstrated to enhance the stress tolerance and yield of different crops under field condition. Towards this endeavor, present work deals with the effect of TU on photosynthetic efficiency and source-to-sink relationship of Indian mustard (Brassica juncea) for understanding its mode of action. The application of TU increased the efficiency of both PSI and PSII photosystems and vegetative growth of plant. The comparative analysis of sucrose to starch ratio and expression level of sugar transporters confirmed the higher source and sink strength in response to TU treatment. The biochemical evidence in support of this was derived from higher activities of sucrose phosphate synthase and fructose-1,6-bis-phosphatase at source; and sucrose synthase and different classes of invertases at both source and sink. This indicated an overall increase in photoassimilate level at sink. An additional contribution through pod photosynthesis was confirmed through the analysis of phosphoenol pyruvate carboxylase enzyme activity and level of organic acids. The increased photoassimilate level was also co-ordinated with acetyl coA carboxylase mediated oil biosynthesis. All these changes were ultimately reflected in the form of 10 and 20% increase in total yield and oil content, respectively under TU treatment as compared to control. Additionally, no change was observed in oil composition of seeds derived from TU treated plants. The study thus signifies the co-ordinated regulation of key steps of photosynthesis and source-to-sink relationship through the external application of TU resulting in increased crop yield and oil content.

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Thiourea mediates alleviation of UV-B stress-induced damage in the Indian mustard (Brassica junceaL.)

Cited by 14 publications

References 36 publications

Biochemical responses of triticale plants treated with UV-B irradiation and nutrient solution enriched with humic acids

Biochemical responses of triticale plants treated with UV-B irradiation and nutrient solution enriched with humic acids

Thiourea: A Molecule with Immense Biological Significance for Plants

Thiourea, a ROS Scavenger, Regulates Source-to-Sink Relationship to Enhance Crop Yield and Oil Content in Brassica juncea (L.)

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