Effect of Ecdysterone on Morphological and Physiological Processes in Plants

Golovatskaya, I. F.

doi:10.1023/b:rupp.0000028689.97402.d5

Cited by 25 publications

(14 citation statements)

References 18 publications

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“…However, three major hypotheses for their potential roles have been proposed: (i) phytohormonal compounds (Dinan 1998;Golovatskaya 2004); (ii) protective compounds against unadapted phytophagous insects (Lafont 1997); and (iii) supply of polyhydroxylated phytosterols (PSs) required for growth and cell proliferation (Machackova et al 1995). The second hypothesis is the most widely accepted.…”

Section: Functions Of Phytoecdysteroids In Plantsmentioning

confidence: 99%

“…The PE 20E may be a physiologically active compound involved in coleoptile elongation, a-amylase activation, and leaf yellowing retardation (Golovatskaya 2004). PEs may be toxic to invertebrate predators by disrupting hormonal processes upon ingestion or may act as antifeedants towards unadapted insect species (Dinan 1998).…”

Section: Importance Of Phytoecdysteroidsmentioning

confidence: 99%

“…The possibility that nature has selected PEs as defensive compounds suggests in turn that they may be developed to play a role in crop protection strategies (Dinan 1995b). Nonetheless, 20E may also affect morphological and physiological processes in plants (Golovatskaya 2004).…”

Section: Introductionmentioning

confidence: 99%

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Biosynthesis and potential functions of the ecdysteroid 20-hydroxyecdysone — a review

Festucci-Buselli

Contim

Barbosa

et al. 2008

Botany

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The ecdysteroid 20-hydroxyecdysone (20E) is a steroid hormone found in arthropods and plants. It is suspected to have agrochemical, biotechnological, medicinal, and pharmaceutical applicability. In insects, 20E controls or elicits molting and other developmental processes, and several characterized P450 enzymes are involved in its biosynthesis. In plants, it may act as a defensive substance against insects and nematodes. It is suspected that 20E, being a physiologically active compound, may affect morphological and physiological processes in plants and that C 27 phytosterols may be its precursors. However, neither its precise function nor its mechanism of biosynthesis in plants is fully understood. Here, the importance of 20E and current understanding of its structure, potential functions, and biosynthesis in both plants and insects are reviewed.Résumé : L'ecdysteroïde, le stéroïde hormonal 20-hydroxyecdysone (20E), se retrouve chez les arthropodes et les plantes. On croit qu'il aurait des applications agrochimiques, biotechnologiques, médicinales et pharmaceutiques. Chez les insectes, le 20E contrôle ou induit la mue et autres processus morphogénétiques, et on compte plusieurs enzymes P450 caractérisées impliquées dans sa biosynthèse. Chez les plantes, il peut agir comme substance de défense contre les insectes et les néma-todes. On croit que le 20E, une substance physiologiquement active, pourrait affecter des processus morphologiques et physiologiques chez les plantes et que des phytostérols en C27 pourraient en être les précurseurs. Cependant, on ne comprend pas complètement sa fonction précise ni le mécanisme de sa biosynthèse. Les auteurs passent en revue la compré-hension actuelle de sa structure, de ses fonctions potentielles et de sa biosynthèse, chez les plantes et chez les insectes.

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Section: Functions Of Phytoecdysteroids In Plantsmentioning

confidence: 99%

Section: Importance Of Phytoecdysteroidsmentioning

confidence: 99%

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Biosynthesis and potential functions of the ecdysteroid 20-hydroxyecdysone — a review

Festucci-Buselli

Contim

Barbosa

et al. 2008

Botany

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“…However, it is suspected that PEs may have three different roles: 1) as physiologically active compounds (Dinan, 1998;Golovatskaya, 2004); 2) as compounds that protect plants from unadapted phytophagous insects (Lafont, 1997);and, 3) as compounds that supply the polyhydroxylated phytosterols that are required for growth and cell proliferation (Machackova et al, 1995). In addition, the PE 20E may have many pharmacological and medicinal effects on mammals (Slama and Lafont, 1995;Dinan, 2001;Lafont and Dinan, 2003;Bathori and Pongracz, 2005;Dinan and Lafont, 2006;Festucci-Buselli et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Level and distribution of 20-hydroxyecdysone during Pfaffia glomerata development

Festucci-Buselli

Contim

Barbosa

et al. 2008

Braz. J. Plant Physiol.

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The ecdysteroid 20-hydroxyecdysone (20E) is a steroid hormone found in insects and few plants. To analyze its temporal and spatial distribution in Pfaffia glomerata (Amaranthaceae), we selected among 71 accessions, the accession 13 which showed the highest root 20E total quantity (1.48 g/plant root). The 20E was constantly detected in flowers, leaves, stems, and roots, but its percentage was variable throughout its development. The highest 20E percentage was found in flowers (0.82%), roots (0.66%), leaves (0.60%), and stems (0.24%). While stems showed the least variable 20E percentage (0.13% -0.24%), followed by roots (0.42% -0.66%), and flowers (0.47% -0.82%). Leaves showed the greatest 20E percentage variation (0.21% -0.60%). The stem and leaves 20E total amount remained constant, showing a little variation while root 20E total amount increased over time, suggesting that 20E may be accumulated in roots. These findings suggest that 20E has tissue specific functions in plant and may have ecological significance since uncoordinated pulses of 20E are often lethal to insects.

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“…This could be explained by a high stimulation of proteins degradation and mobilization by activation of proteases or by an inhibition of proteins synthesis. The sole study conducted on the effects of exogenous application of 20E on high plants showed also stimulatory effects of 20E in wheat Triticum vulgar, increase in -amylase activity in the aleurone layer of barley and enhancement of chlorophyll content in the senescent kidney bean leaves Phaseolus vulgaris (Golovatskaya, 2004).…”

Section: Discussionmentioning

confidence: 99%

Effects of plant hormones and 20-hydroxyecdysone on tomato (Lycopersicum esculentum) seed germination and seedlings growth

Bakrim¹,

Lamhamdi²,

Sayah³

et al. 2007

Afr. J. Biotechnol.

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20-hydroxyecdysone (20E)is the major phytoecdysteroid of about 6% of plants. Its role in plant physiology has not been fully elucidated. In this work we studied the effects of 20E application on some morphological and biochemical parameters of tomato, Lycopersicum esculentum, seed during germination and seedling development (5 d). We compared the 20E effects with the action of phytohormones: gibberellic acid (GA 3 ), naftalen acetic acid (NAA), benzyl amino purine (BAP). NAA treatment resulted in marked reduction in shoot length. GA 3 treatment promoted maximal shoot elongation. BAP affected negatively shoot length only at late stages, while 20E application stimulated shoot elongation at early stages and reduced it on the fifth day; NAA inhibited root elongation all along the test period. GA 3 treatment had no effect on root length, whereas BAP showed strong inhibition on root elongation. On the other hand, 20E showed a weak inhibition of root elongation on the fifth day. As compared to control and to other treatments, NAA and 20E provoked a drastic decrease in protein contents during seedling growth, whereas a high increase was observed under BAP treatment. Electrophoresis revealed that protein bands were not degraded and mobilized after NAA treatment while in control or after 20E and others phytohormones applications, protein patters displayed weak band intensities and some of them were not detected. NAA, GA 3 and BAP provoked a decrease in proline content during seedlings, while the effect of 20E on proline levels varied during germination and plantlet development. This work showed that 20E like phytohormones fulfil some bioactive actions during germination and seedlings growth in tomato.

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Effect of Ecdysterone on Morphological and Physiological Processes in Plants

Cited by 25 publications

References 18 publications

Biosynthesis and potential functions of the ecdysteroid 20-hydroxyecdysone — a review

Biosynthesis and potential functions of the ecdysteroid 20-hydroxyecdysone — a review

Level and distribution of 20-hydroxyecdysone during Pfaffia glomerata development

Effects of plant hormones and 20-hydroxyecdysone on tomato (Lycopersicum esculentum) seed germination and seedlings growth

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