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      Effect of ascorbic and salicylic acids on growth and flowering of Gazania cv. Frosty Kiss Mixed Translated title: Efeito dos ácidos ascórbico e salicílico no crescimento e floração de Gazania cv. Frosty Kiss Mixed

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          Abstract

          Abstract An experiment was conducted during the season 2018-2019 in the lath house to study the effect of foliar spray with Ascorbic Acid (AsA) and Salicylic Acid (SA) on vegetative and flowering growth traits of Gazania (Gazania rigens L.) cv. Frosty Kiss Mixed. The experiment was designed as a factorial experiment (3×3) in Randomized Complete Blocks Design (RCBD) with three replicates. Plants were sprayed with concentrations of 0, 100, and 200 mg L-1 of AsA, and 0, 150 and 300 mg L-1 of SA. Foliar spray with 200 mg L-1 of AsA was superior on increasing number of leaves (40.00), number of suckers (9.22), leaf area (2174.09 cm2), leaves dry weight (6.36 g), number of flowers (5.64), early of flowering date (97.22 days), flower fresh and dry weight (4.78 g) (0.51 g) respectively, while spray with a concentration of 100 mg L-1 led to increase flower diameter (6.37 cm) and flowering duration (10.85 days). Foliar spray with SA improved all vegetative and flowering traits. Treatment of 300 mg L-1 was the most significant effect in increasing number of leaves (39.56), leaf area (2182.06 cm2), leaves fresh weight (43.93 g), number of flowers (5.83), flower diameter (6.31 cm), early of flowering date (98.07 days), and flower dry weight (0.50 g). The interaction effect between the studied factors was significant in all studied traits. Treatment of AsA200×SA150 was the most effective and gave the best results in terms of number of suckers (9.11), dry weight of leaves (6.49 g), number of flowers (5.87), flower diameter (6.44 cm), flowering date (96.98 days), flowering duration (10.89 days).

          Translated abstract

          Resumo O experimento foi conduzido no período 2018-2019 em ripado para estudar o efeito da aspersão foliar com ácido ascórbico (AsA) e ácido salicílico (SA) sobre as características de crescimento vegetativo e florescimento de Gazania (Gazania rigens L.) cv. Frosty Kiss Mixed. O experimento foi delineado como fatorial (3 × 3) em design de blocos completamente casualizados (RCBD) com três repetições. As plantas foram pulverizadas com concentrações de 0, 100 e 200 mg l-1 de AsA e 0, 150 e 300 mg l-1 de SA. A pulverização foliar com 200 mg l-1 de AsA foi superior no número de folhas (40,00), número de brotos (9,22), área foliar (2174,09 cm2), peso seco das folhas (6,36 g), número de flores (5,64), no início da data da floração (97,22 dias), peso fresco e seco da inflorescência (4,78 g e 0,51 g, respectivamente) enquanto a pulverização com a concentração de 100 mg l-1 induziu ao aumento do diâmetro da flor (6,37 cm) e da duração da floração (10,85 dias). A pulverização foliar com SA melhorou todas as características vegetativas e florais. O tratamento de 300 mg l-1 foi o efeito mais significativo no aumento do número de folhas (39,56), área foliar (2182,06 cm2), peso fresco das folhas (43,93 g), número de flores (5,83), diâmetro das flores (6,31 cm), no início da data da floração (98,07 dias) e peso seco da inflorescência (0,50 g). O efeito da interação entre os fatores estudados foi significativo em todas as características estudadas. O tratamento de AsA200 × SA150 foi o mais eficaz e proporcionou os melhores resultados em termos de número de brotos (9,11), peso seco das folhas (6,49 g), número de flores (5,87), diâmetro da flor (6,44 cm), data da floração (96,98 dias), duração da floração (10,89 dias).

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          Most cited references32

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          Salicylic acid beyond defence: its role in plant growth and development.

          In recent years salicylic acid (SA) has been the focus of intensive research due to its function as an endogenous signal mediating local and systemic plant defence responses against pathogens. It has also been found that SA plays a role during the plant response to abiotic stresses such as drought, chilling, heavy metal toxicity, heat, and osmotic stress. In this sense, SA appears to be, just like in mammals, an 'effective therapeutic agent' for plants. Besides this function during biotic and abiotic stress, SA plays a crucial role in the regulation of physiological and biochemical processes during the entire lifespan of the plant. The discovery of its targets and the understanding of its molecular modes of action in physiological processes could help in the dissection of the complex SA signalling network, confirming its important role in both plant health and disease. Here, the evidence that supports the role of SA during plant growth and development is reviewed by comparing experiments performed by exogenous application of SA with analysis of genotypes affected by SA levels and/or perception.
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            Effect of exogenous salicylic acid under changing environment: A review

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              Photosynthetic responses of corn and soybean to foliar application of salicylates.

              Salicylic acid (SA) and related phenolic compounds can exert control over stomatal opening and previous work in our laboratory has shown that chronic injection of SA increases the photosynthetic rate of corn. The work reported in this paper investigated the effects of foliar applied SA, acetyl salicylic acid (ASA) and gentisic acid (GTA) on photosynthetic rates and growth of soybean (a C3 plant) and corn (a C4 plant) under greenhouse conditions. In general, the tested compounds enhanced photosynthetic rates in both soybean and corn. Stomatal conductance and transpiration were also increased. These compounds do not alter chlorophyll content. In some cases treatment with these compounds resulted in increased leaf areas and plant dry mass, however, plant height and root length were not affected.
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                Author and article information

                Journal
                oh
                Ornamental Horticulture
                Ornam. Hortic.
                Sociedade Brasileira de Floricultura e Plantas Ornamentais (Viçosa, MG, Brazil )
                2447-536X
                December 2020
                : 26
                : 4
                : 537-544
                Affiliations
                [1] orgnameUniversity of Diyala orgdiv1College of Agriculture orgdiv2Department of Horticulture and Landscape Architecture Iraq
                Article
                S2447-536X2020000400537 S2447-536X(20)02600400537
                10.1590/2447-536x.v26i4.2118
                cd4543ea-e46a-44d9-a1f2-bb8ca73d6efc

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 01 June 2020
                : 10 December 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 32, Pages: 8
                Product

                SciELO Brazil

                Categories
                Scientific Article

                pulverização foliar,ascorbic acid,floral growth,foliar spray,Gazania rigens L.,salicylic acid,vegetative growth,ácido ascórbico,crescimento floral,ácido salicílico,crescimento vegetativo

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