Influence of paclobutrazol on water consumption and plant performance of Arbutus unedo seedlings

Navarro, Alejandra; Sánchez-Blanco, María Jesús; Bañón, S.

doi:10.1016/j.scienta.2006.10.014

Cited by 44 publications

(32 citation statements)

References 27 publications

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“…Reduction of plant water content under drought stress could partly be quenched by PBZ treatment. Navarra et al (2007) reported that PBZ-treated plants showed better water status which supports our results.…”

Section: Discussionsupporting

confidence: 91%

Influence of exogenously applied paclobutrazol on some physiological traits and growth of Stevia rebaudiana under in vitro drought stress

Hajihashemi

Ehsanpour

2013

Biologia

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This investigation was carried on to find out the changes occurred in Stevia rebaudiana in response to paclobutrazol (PBZ; 0–4 mg L−1) treatment and drought stress. Polyethylene glycol (PEG; 0–6 % w/v) was used to stimulate drought stress. Drought stress reduced fresh and dry weight, water content, chlorophylls, carotenoids, anthocyanins, water soluble carbohydrates, reducing sugar and proline amounts. Electrolyte leakage, MDA, α-tocopherol and glycine betaine contents increased in drought-stressed plants. The activity of P5CS and PDH enzymes and protein content showed no significant changes under drought stress. PBZ (with or without PEG) treatments decreased fresh and dry weight and water content. In PBZ-treated plants, less pigments was damaged by drought stress. PBZ treatment reduced the negative effect of drought stress on lipid peroxidation which resulted in lower electrolyte leakage and MDA content, compared to the same PEG level without PBZ. PBZ (with or without PEG) treatments increased glycine betaine, α-tocopherol, proline and protein contents. The amount of water soluble carbohydrates, reducing sugar and activity of P5CS and PDH were not affected by PBZ treatments. SDS-PAGE analysis revealed that drought stress increased a 25 kD protein with a critical function in plant development under stresses. According to the results, PEG provoked a severe drought stress in S. rebaudiana that could partly be restored by PBZ treatment.

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Section: Discussionsupporting

confidence: 91%

Influence of exogenously applied paclobutrazol on some physiological traits and growth of Stevia rebaudiana under in vitro drought stress

Hajihashemi

Ehsanpour

2013

Biologia

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“…1). These results were also observed by Navarro et al 4 in Arbutus unedo seedlings. On the basis of these criteria, we demonstrated that 2 ppm PBZ applied to plants was able to protect Welsh onion from flooding stress.…”

Section: Discussionsupporting

confidence: 87%

“…1 In ornamental crops, PBZ is used to reduce the size of plants, improving compactness. With respect to its other functions, PBZ has been used to provide plant protection against environmental stresses such as chilling, 2 water deficit, 3,4 flooding, 5,6 salt 7 and cadmium. 8 Therefore, the triazoles have been characterized as plant multi-protectants.…”

Section: Paclobutrazol (Pbz) [(2rs3rs)-1-(4-chlorophenyl)-mentioning

confidence: 99%

“…Subsequently, a concomitant decline in photosynthesis results from diminished availability of CO 2 for carbon fixation. 4 This reduction of CO 2 concentration increases the amount of harmful reactive oxygen species (ROS) within the leaf due to ongoing light reactions, which can lead to senescence and even the death of the plant. 11 Thus, maintaining the balance between the formation and detoxification of ROS is critical to cell survival during flooding stress.…”

Section: Paclobutrazol (Pbz) [(2rs3rs)-1-(4-chlorophenyl)-mentioning

confidence: 99%

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Changes in antioxidant properties and their relationship to paclobutrazol‐ induced flooding tolerance in Welsh onion

Yiu

Kuo

et al. 2008

J Sci Food Agric

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BACKGROUND: Flooding is an important factor affecting Welsh onion production, because under such stress the production and quenching of reactive oxygen species (ROS) in plants will fail to be kept in a balanced state. The purpose of this study was to examine the effect of paclobutrazol (PBZ) on the growth and development of Welsh onion plants (Allium fistulosum L.), particularly to evaluate changes in antioxidant properties.

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“…As a result, the plants treated with PBZ showed increased leachate levels, as a consequence of their lower growth compared with the non-treated plants. The greater leaching resulting from PBZ treatment has been previously reported by Navarro et al (2007a) in strawberry tree. This increase in the leachate per pot was accompanied by a substantial decrease in substrate residue concentration as the experiment progressed.…”

Section: Discussionmentioning

confidence: 47%

Distribution in plant, substrate and leachate of paclobutrazol following application to containerized Nerium oleander L. seedlings

Ochoa

Franco

Bañón

et al. 2009

Span. j. agric. res.

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Paclobutrazol (PBZ) is a retardant often used in potted ornamental plants to control their growth and compactness. The distribution in plant, substrate and leachate of PBZ applied to containerized oleander seedlings were studied after a single liquid drench application to the substrate surface (20 mg a.i. per plant) in a nursery dedicated to pot production in SE Spain. PBZ significantly reduced all growth parameters, providing more compact plants of good commercial value and confirming its ability to reduce the vertical growth of native oleander in the nursery. The level of PBZ residues in leaves was higher at the end of pot cultivation (156 days post PBZ application) than at the first sampling time (30 days after PBZ application), whereas the level in stems decreased for the same period of time. PBZ residues in roots remained constant during the experimental period. The high level of PBZ residues detected in the substrate 30 days after application had decreased significantly (by 67%) by the end of the experiment. A greater leaching fraction was detected for PBZ-treated seedlings and so a greater amount of PBZ was leached into the nursery soil with the irrigation water at the end of the experiment. This greater amount of PBZ leached into the soil represents an important way of contamination in the nursery and a substantial risk to the environment.Additional key words: contamination, cultar, nursery, oleander, residues, uptake. ResumenDistribución en planta, sustrato y drenaje de paclobutrazol aplicado a plántulas de Nerium oleander L. en contenedor Paclobutrazol (PBZ) es un retardante del crecimiento frecuentemente utilizado en el cultivo de plantas ornamentales en maceta para el control de su crecimiento y compacidad. La distribución en el sustrato, planta y drenaje de PBZ aplicado a plántulas de adelfa en contenedor fue estudiada tras la aplicación de una única dosis a la superficie del sustrato de la maceta (20 mg i.a. por planta) en una plantación comercial de un vivero localizado en el Sureste de España. PBZ redujo significativamente todos los parámetros del crecimiento, proporcionando plantas más compactas de buen valor comercial y conformando su capacidad para reducir el fuerte crecimiento vertical de la adelfa nativa en el vivero. El nivel de residuos de PBZ en hojas resultó más elevado al final del ciclo de cultivo en maceta (156 días tras la aplicación) que a los 30 días de la aplicación, mientras que la cantidad de residuos presentes en el tallo disminuyó para el mismo periodo de tiempo. Los residuos de PBZ en las raíces permanecieron constantes durante todo el período experimental. El elevado contenido de residuos de PBZ detectados en el sustrato 30 días después de la aplicación se redujo significativamente (en un 67%) al final del experimento. Una mayor fracción de drenaje fue detectada en las plántulas tratadas con PBZ, a la vez que una mayor cantidad de PBZ fue drenado en el suelo del vivero conjuntamente con el agua de riego al final del experimento. Esta mayor cantidad de PBZ drenado en ...

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Influence of paclobutrazol on water consumption and plant performance of Arbutus unedo seedlings

Cited by 44 publications

References 27 publications

Influence of exogenously applied paclobutrazol on some physiological traits and growth of Stevia rebaudiana under in vitro drought stress

Influence of exogenously applied paclobutrazol on some physiological traits and growth of Stevia rebaudiana under in vitro drought stress

Changes in antioxidant properties and their relationship to paclobutrazol‐ induced flooding tolerance in Welsh onion

Distribution in plant, substrate and leachate of paclobutrazol following application to containerized Nerium oleander L. seedlings

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