Peroxidase and Senescence

Birecka, H.; Chaskes, M. J.; Goldstein, J

doi:10.1093/jxb/30.3.565

Cited by 26 publications

(13 citation statements)

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“…This concurs similar findings reported in detached rice leaves (Kar and Mishra, 1976;Patra et al, 1979;Reddy et al, 1985), tobacco (Parish, 1968) and oat (Birecka et al, 1979;Kar and Feieraband, 1984). There are also reports of suppression of peroxidase activity by growth regulators in barley leaves (Sharma and Biswal, 1976) and pea stem sections (Henry and Jordan, 1977).…”

Section: Changes In Peroxidase Activitysupporting

confidence: 90%

“…A sharp rise in peroxidase activity in light-incubated paddy leaves indicates that this isozyme is light-dependent and is influenced by light. Such light-dependence of this enzyme was also observed by Birecka et al, (1979) in oat leaves. Accumulation of oxy-free radicals following light enhanced peroxidase activity in light (Kar and Feieraband, 1984) and accelerated chlorophyll bleaching (Huff, 1982) clearly point out that peroxidase isozymes play an important role in leaf senescence.…”

Section: Changes In Peroxidase Activitysupporting

confidence: 73%

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Impact of some phytohormones, metabolic inhibitor and agrochemicals on senescing paddy leaves and its relevance to productivity

Rafath¹

2017

Ann.Pl.Sci.

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The influence of hormones viz. Indole acetic acid (IAA), Gibberellic acid (GA3), Cytokinins viz. Benzyladenine (BA), Benzimidazole (BZI), biocides viz. 2,4-Dichlorophenoxy acetic acid (2,4-D), Diathane M-45, Dimecron and metabolic inhibitors viz. Cycloheximide (CHI) and Actinomycin-D (Act-D) on senescence in detached paddy (Oryza sativa L.) leaves was studied under dark and illuminated conditions. Cytokinins were found to be more effective senescence retardants in light than in dark while auxins were effective in light. Biocides proved to be milder senescence retardants. Effective concentration, a concentration away from the ineffective and toxic range, chosen from IAA, GA3, BA, BZI, 2,4-D, Diathane M-45 and Dimecron were 25,100, 5, 100, 25, 1500 and 0.50 ppm respectively. Application of Act-D (inhibitor of mRNA synthesis) with in 15 min after detachment and cycloheximide (inhibitor of cytoplasmic protein synthesis) from the start of the incubation resulted in suppression of peroxidase activity both under light and dark. Catalase activity exhibited an inverse relation with peroxidase activity under both the experimental conditions. It is recommended that attempts must be made in a more sophisticated way to study the changes in activities of different enzymes suspected to be linked with leaf senescence at a deeper level using all modern techniques available so that the exact nature of enzymes, the isoenzymes pattern and their relation with yield can be understood. Such studies may also help in future in manipulating the projects for the improvement of this economically important cereal crop.

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Section: Changes In Peroxidase Activitysupporting

confidence: 90%

Section: Changes In Peroxidase Activitysupporting

confidence: 73%

Impact of some phytohormones, metabolic inhibitor and agrochemicals on senescing paddy leaves and its relevance to productivity

Rafath¹

2017

Ann.Pl.Sci.

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“…Indeed, one may wonder if in Civitavecchia the extreme values of the oldest leaves are outliers and not the effect of a real trend, that would be in agreement with the ANOVA results. No seasonal fluctuation may be detected on the scatter diagrams, in agreement with the known peroxidase increase over ageing (Birecka et al 1979). …”

Section: Peroxidase F1supporting

confidence: 85%

Pollution Bioindicators: Statistical Analysis of a Case Study

Camiz

Altieri

Manes

2008

Water Air Soil Pollut

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In this paper a three-step procedure is proposed to deal with ecological data, usually very complex in their treatment. The three steps -exploratory, confirmatory, and modelling phases -reflect the different methodological approaches necessary in each phase of the study. To illustrate the methodology, a case study is proposed, concerning the suitability of plants as pollution bioindicators. Samples of differently aged Pinus pinea L. needles were collected throughout 1 year in three different locations, whose human disturbance was known to be different. In the samples some morphological and functional parameters were measured, whose relation with the stress was already known. The exploratory analysis suggested pollution with human origin, the needle's age, and the environmental conditions as the main factors of influence of damage. The confirmatory analysis confirmed both site and age as main factors and occasionally the sampling date. On this basis, some models were estimated separately for each site: models that best described the damage as function of age resulted nonlinear and some of them with seasonal fluctuations. As a result, whereas the models described well enough the pollution temporal variation, the difference of pollution in the sites was best described by the different values of the models parameters in the different sites. In short, different pollution conditions are described better by the damage trend than by the individual measures. The three-step procedure resulted of high utility in outlining the most interesting relations to investigate through the modelling, the opportunity to model the indicators variation along time separately for each site, and to introduce the seasonal variation in some models.

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“…Thus, the assay of mRNA by northern blotting using PePerl as probe provides only a preliminary analysis of the combined expression of a11 of these genes. Peroxidases are considered reliable indicators of senescence in plant tissues (Birecka et al, 1979;Gaspar et al, 1982;Abeles et al, 1988;Tadeo and Primo-Millo, 1990). It was thus not surprising to find a high expression of P17 mRNA in senescing Petuniu leaves.…”

Section: Structural Analysis and Expression Of The Anionic Peroxidasementioning

confidence: 99%

A Thiol Protease and an Anionic Peroxidase Are Induced by Lowering Cytokinins during Callus Growth in Petunia

et al. 1996

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We previously identified a group of proteins that increase early i n Petunia hybrida calli subcultured on a low-cytokinin medium, unlike the calli subcultured on a high-cytokinin medium. The calli on the low-cytokinin medium do not regenerate (J.-P. Renaudin, C. Tournaire, B. Teyssendier de Ia Serve [1991] Physiol Plant 82: 48-56). Two of these proteins, P21 and P17, have been identified by peptide sequencing and cloned. P21 is highly homologous to a group of thiol proteases, including barley aleurain, rice oryzain y, Arabidopsis SACZ, and mammalian cathepsin H. P17 is highly homologous to a group of anionic peroxidases from potato and tomato. A study of their expression in t w o P. hybrida lines, PC6 and St40, which differ in their ability to regenerate, showed that the genes for P21 and P17 are differentially expressed depending on the type and the age of the organ, with the highest expression in senescing leaves and in aged calli. The data are in favor of these genes being associated with an early step of senescence, which may be due, i n part, to a reduction i n total cytokinin. The two fetunia lines are, thus, functionally different concerning the action of cytokinin in two developmental phenomena: in vitro organogenesis and senescence.In vitro organogenesis is a complex, developmental pathway of plant tissues under the control of a large range of effectors, including, notably, growth substances, nutrients, and light (Thorpe, 1980). The duration of the biological response, spanning days and even weeks, and the paucity of genetic studies have notably contributed to our limited understanding of the control of in vitro organogenesis. Cytokinins are considered key regulators of the formation of vegetative buds in vitro, both when they are added in vitro (Skoog and Miller, 1957) and when they are synthesized endogenously (Estruch et al., 1991; Li et al., 1992). Our knowledge of cytokinin function still lags behind that of the other plant growth substances, although some progress has been made in this area recently (Binns, 1994).We have developed a biological system to search for molecular markers of cytokinin action during in vitro organogenesis (Renaudin et al., 1990). Microcalli grown from Petunia kybrida mesophyll protoplasts were induced to regenerate * Corresponding author; e-mail renaudin@msdos.ensam.inra.fr; fax 33-67-52-57-37. buds, roots, or further calli according to the absolute concentrations of auxin and cytokinin added to the culture medium, and the effect of cytokinin on vegetative bud formation was studied (Renaudin et al., 1990;Traas et al., 1990). The continuous presence of cytokinin was required for 2 weeks, until bud primordia were formed. Vegetative buds became visible at the end of the 3rd week of culture. The growth of calli during the first 2 weeks occurred to the same extent when the cytokinin concentration was lowered 10-fold, but primordium induction and vegetative bud regeneration were triggered only by the highest cytokinin concentration.2D SDS-PAGE patterns of total protein of Petu...

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Peroxidase and Senescence

Cited by 26 publications

References 0 publications

Impact of some phytohormones, metabolic inhibitor and agrochemicals on senescing paddy leaves and its relevance to productivity

Impact of some phytohormones, metabolic inhibitor and agrochemicals on senescing paddy leaves and its relevance to productivity

Pollution Bioindicators: Statistical Analysis of a Case Study

A Thiol Protease and an Anionic Peroxidase Are Induced by Lowering Cytokinins during Callus Growth in Petunia

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