Induction of drought tolerance by paclobutrazol and irrigation deficit in Phillyrea angustifolia during the nursery period

Hernández, Juan Antonio Fernández; Balenzategui, L.; Bañón, S.; Franco, J.A.

doi:10.1016/j.scienta.2005.07.008

Cited by 59 publications

(24 citation statements)

References 32 publications

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“…An increase in d 18 O could indicate the use of a shallower, more isotopically enriched water resource (Moreno-Gutiérrez et al 2012b, or higher evaporative enrichment of leaf water (Barbour 2007) regulated by stomatal conductance, in comparison with the other two species. Indeed, it has been observed that P. lentiscus develops a dense root system along the soil profile (Vilagrosa et al 2003), while P. angustifolia and J. phoenicea seem to have a sparse root system (Fernández et al 2006). Generally, in semi-arid environments, a dense root system can take advantage of small rainfall episodes, improving water absorption and permitting a better rehydration after summer drought (Canadell and Zedler 1995).…”

Section: Discussionmentioning

confidence: 99%

Tree-ring carbon and oxygen isotopes indicate different water use strategies in three Mediterranean shrubs at Capo Caccia (Sardinia, Italy)

Altieri

Mereu

Cherubini

et al. 2015

Trees

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Key message Variations in stable carbon and oxygen isotope compositions of co-occurring plant species reflect their different water use strategies and indicate the importance of screening species' WUE i to plan climate change adaptation strategies. Abstract The different abilities of plant species to cope with drought have been associated with structural and ecophysiological constraints. In this paper, we evaluate interspecific differences in intrinsic water use efficiency (WUE i ) and the ratio of photosynthesis (A) to stomatal conductance (g s ) in three co-occurring Mediterranean shrubs: two broad-leaved evergreen (Pistacia lentiscus and Phillyrea angustifolia) and one needle-like-leaved evergreen (Juniperus phoenicea). We used d 13 C in rings to assess inter-annual changes in WUE i while the influence of the stomatal conductance was explored through d 18 O. Our results indicate consistent differences in WUE i in the three species, largely determined by leaf traits and differences in stomatal conductance control. Juniperus phoenicea could be the most threatened by the current trend of increasing temperature and summers drought. Phillyrea angustifolia and P. lentiscus seem to be less affected by drought stress because of their tighter stomatal control and high survival rate under field conditions. Our study shows that shrubs with different leaf traits employ different plant ecophysiological strategies under drought stress.

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Section: Discussionmentioning

confidence: 99%

Tree-ring carbon and oxygen isotopes indicate different water use strategies in three Mediterranean shrubs at Capo Caccia (Sardinia, Italy)

Altieri

Mereu

Cherubini

et al. 2015

Trees

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“…In 2005 over 245 million ornamental plants were produced in Spain (MAPA, 2006). Many of them are wild native species that are largely produced for xerogardening and landscape restoration projects in semi-arid environments, because they are well adapted to adverse environmental conditions (Fernández et al, 2006). Oleander (Nerium oleander L.) is a native plant of the Mediterranean regions widely grown as a drought-adapted shrub in landscape designs and as a flowering pot plant.…”

Section: Introductionmentioning

confidence: 99%

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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“…Most PGR studies have focused on controlling plant size and limited work has been reported on secondary effects of PGRs on postharvest durability, plant water or nutrition use, and ethylene sensitivity of bedding plants. A few studies have been reported on the role of paclobutrazol on water stress tolerance in Arachis hypogaea L., Curcuma alismatifolia, and Phillyrea angustifolia L. (Fernandez et al, 2006;Jungklang and Saengnil, 2012;Sankar et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Paclobutrazol or uniconazole effects on ethylene sensitivity of potted ornamental plants and plugs

Ahmad

Dole

Whipker

2015

Scientia Horticulturae

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Induction of drought tolerance by paclobutrazol and irrigation deficit in Phillyrea angustifolia during the nursery period

Cited by 59 publications

References 32 publications

Tree-ring carbon and oxygen isotopes indicate different water use strategies in three Mediterranean shrubs at Capo Caccia (Sardinia, Italy)

Tree-ring carbon and oxygen isotopes indicate different water use strategies in three Mediterranean shrubs at Capo Caccia (Sardinia, Italy)

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

Paclobutrazol or uniconazole effects on ethylene sensitivity of potted ornamental plants and plugs

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