Evaluation of Heat Shock and Salicylic Acid Treatments as Inducers of Drought Stress Tolerance in Hassawi Wheat

Azooz, M. M.; Youssef, Magdy M.

doi:10.3923/ajpp.2010.56.70

Cited by 49 publications

(23 citation statements)

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“…SA plays an important role in plant disease resistance (Klessig and Malamy 1994;Popova et al 1997) and now widely accepted as a major signal transducer or messenger for biotic stress (Klessig and Malamy 1994;Ganesan and Thomas 2001). More recent studies reported that the externally applied SA increased plant's tolerance to several abiotic stresses, including osmotic stress (Singh and Usha 2003;Al-Hakimi 2006), drought (Azooz and Youssef 2010), salinity (Shakirova et al 2003;Gunes et al 2007), and heavy metal stress Moussa and El-Gamel 2010). These studies suggest that SA may enhance the multiple types of stress tolerance in plants through which interactive effects on several functional molecules or other signaling molecules participating in more complex stress responses.…”

Section: Introductionmentioning

confidence: 96%

Changes in the water status and osmotic solute contents in response to drought and salicylic acid treatments in four different cultivars of wheat (Triticum aestivum)

et al. 2011

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Salicylic acid (SA) controls growth and stress responses in plants. It also induces drought tolerance in plants. In this paper, four wheat (Triticum aestivum L.) cultivars with different drought responses were treated with SA in three levels of drain (90, 60, 30% of maximum field capacity) to examine its interactive effects on drought responses and contents of osmotic solutes that may be involved in growth and osmotic adjustment. Under drought condition, the cultivars Geza 164 and Sakha 69 had the plant biomass and leaf relative water content (LRWC) greater than the cultivars Gemaza 1 and Gemaza 3. In all cultivars, drought stress decreased the biomass, LRWC, and the contents of inorganic solutes (Ca, K, Mg) and largely increased the contents of organic solutes (soluble sugars and proline). By contrast, SA increased the biomass, LRWC and the inorganic and organic solute contents, except proline. Correlation analysis revealed that the LRWC correlated positively with the inorganic solute contents but negatively with proline in all cultivars. SA caused maximum accumulations of soluble sugars in roots under drought. These results indicated that SA-enhanced tolerance might involve solute accumulations but independently of proline biosynthesis. Drought-sensitive cultivars had a trait lowering Ca and K levels especially in shoots. Possible functions of the ions and different traits of cultivars were discussed.

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Section: Introductionmentioning

confidence: 96%

Changes in the water status and osmotic solute contents in response to drought and salicylic acid treatments in four different cultivars of wheat (Triticum aestivum)

et al. 2011

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“…In tomato, the seedlings had a significant increase in Ca content by treatments AB 10 Es importante señalar que cada especie demanda requerimientos particulares de nutrimentos que permiten un crecimiento y un vigor óptimo, estos requerimientos no son constantes y cambian según las plantas y el medio donde crecen y se desarrollan (Timmer and Armstrong, 1987). En términos generales el uso de AS asperjado de forma foliar muestra un beneficio en el crecimiento de las partes aéreas de las plantas en situaciones en donde algunos factores de estrés están presentes (Khodary, 2004;Najafian et al, 2009;Azooz and Youseef, 2010;Wang et al, 2010); sin embargo, en el presente estudio las plántulas no se sometieron a algún tipo de estrés.…”

Section: Resultados Y Discusiónunclassified

“…The use of sprinkled AS on leafs has a benefit on growth of the aerial parts of the plants in situations where some stresses are present (Khodary, 2004;Najafian et al, 2009;Azooz and Youseef, 2010;Wang et al, 2010); however, in this study the seedlings were not subjected to any stress.…”

Section: Conclusionesmentioning

confidence: 86%

Efecto de la aplicación exógena de ácido benzoico y salicílico en el crecimiento de plántulas de tomate, tomatillo y pimiento

Sepúlveda

González-Morales

Valdéz-Aguilar

et al. 2018

Remexca

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ResumenEl ácido benzoico y sus derivados tales como el ácido salicílico, son componentes metabólicos que realizan funciones críticas en las plantas. El objetivo del estudio fue verificar el efecto de la aplicación foliar de los ácidos benzoico y salicílico sobre el crecimiento y composición mineral de plántulas de tomate, tomatillo y pimiento. Las plántulas fueron cultivadas en invernadero y crecidas en contenedores de poliestireno utilizando como sustrato peat moss y perlita (80:20). Los riegos se realizaron con solución nutritiva Steiner. Los tratamientos consistieron en aplicaciones foliares semanales de AB y AS en concentraciones 10 -4 , 10 -5 , 10 -6 M y un testigo con agua. Las variables analizadas fueron altura y diámetro de tallo, área foliar, biomasa aérea y de raíz y contenido de minerales. El diseño experimental utilizado fue completamente al azar con 25 repeticiones por tratamiento, siendo la unidad experimental una plántula. La aplicación de AS y AB en plántulas de tomate y pimiento dio lugar a respuestas positivas en algunas variables de crecimiento y de composición mineral. En el tomatillo casi todas las variables respondieron de forma negativa frente al AS y AB. El patrón de respuesta de la biomasa aérea y de raíz de las tres especies no fue sistemático ni predecible, de manera que si una variable aumentaba otra podía disminuir. AbstractBenzoic acid and its derivatives, such as salicylic acid are metabolic components that perform critical functions in plants.The aim of the study was to verify the effect of foliar application of benzoic and salicylic acid on seedling growth and mineral composition of tomato, tomatillo and pepper. Seedlings were grown under greenhouse in polystyrene containers using as substrate peat moss and perlite (80:20). Irrigation was performed with Steiner nutrient solution. Treatments consisted on weekly foliar applications of AB and AS at concentrations 10 -4 , 10 -5 , 10-6 M and a control with water. The variables were height and stem diameter, leaf area, aerial and root biomass and mineral content. The experimental design was completely randomized with 25 replications per treatment, being the experimental unit a seedling. The application of AS and AB in tomato and pepper seedlings gave positive responses in some growth variables and mineral composition. In tomatillo most variables responded negatively to AS and AB. The response pattern of aerial and root biomass from the three species was not systematic or predictable, so that if a variable increased another could decrease. Zn and Ca content increased in tomato and pepper seedlings respectively, when applying AS and AB, while in tomatillo all mineral concentrations decreased when these compounds were applied. IntroducciónLas plantas son organismos que continuamente producen compuestos químicos, volátiles y no volátiles que usan como señales para adaptarse y responder a los cambios del medio ambiente (Avanci et al., 2010). Entre estos, las fitohormonas tienen un papel importante, ya que están involucradas en actividades ...

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“…Generally speaking, the use of SA as a foliar spray shows a benefit on the growth of the aerial parts of plants in situations where some stressors are present [12] [18] [20] [47]. In the case of root weight no significant difference was found after the first SA spraying, however, after the second application a lower root growth in the treated plants was observed.…”

Section: Plant Growthmentioning

confidence: 97%

Concentration of Salicylic Acid in Tomato Leaves after Foliar Aspersions of This Compound

Guzman-Tellez¹,

Montenegro²,

Benavides-Mendoza³

2014

AJPS

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Increased plant tolerance to stress may be chemically induced with applications of salicylic acid (SA). The aim of this study was to determine the change in the SA leaf concentration over time in response to the SA spraying in leaves of greenhouse grown tomato. In sprayed leaves the SA concentration showed changes over time similar to the reported responses to environmental stress. Two days after the first application, the SA foliar concentration reached the maximum of 8 µg•g −1 , equivalent to twice the amount observed in the control plants. SA decreased until it reached the level of control plants eight days later. A second application showed actually the same response, but with a faster decline of SA in two days. According to the results of this assay, SA applications on tomato should be performed within a minimum interval of eight days in order to maintain the SA concentration related with the increase in plant tolerance to environmental stress.

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Evaluation of Heat Shock and Salicylic Acid Treatments as Inducers of Drought Stress Tolerance in Hassawi Wheat

Cited by 49 publications

References 50 publications

Changes in the water status and osmotic solute contents in response to drought and salicylic acid treatments in four different cultivars of wheat (Triticum aestivum)

Changes in the water status and osmotic solute contents in response to drought and salicylic acid treatments in four different cultivars of wheat (Triticum aestivum)

Efecto de la aplicación exógena de ácido benzoico y salicílico en el crecimiento de plántulas de tomate, tomatillo y pimiento

Concentration of Salicylic Acid in Tomato Leaves after Foliar Aspersions of This Compound

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