Produção de rosas influenciada pela aplicação de doses de silício no substrato

Júnior, Luiz Antônio Zanão; V., Víctor Hugo Álvarez; Carvalho-Zanão, Maristela Pereira; Fontes, Renildes Lúcio Ferreira; Grossi, José Antônio Saraiva

doi:10.1590/s0100-06832013000600017

Cited by 9 publications

(7 citation statements)

References 25 publications

(24 reference statements)

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“…The following are the nutrients supplied in the nutrient solution (ZANÃO JÚNIOR et al, 2013) The growth retardant paclobutrazol (PBZ)-a plant growth hormone inhibitor-was applied weekly directly to the substrate at a dose of 1mg per week during seven weeks. When more than 50% of the capitulum flowers were open, plant gas exchange rates were measured and leaf samples for anatomical studies were collected.…”

Section: Methodsmentioning

confidence: 99%

Leaf anatomy and gas exchange of ornamental sunflower in response to silicon application

Júnior¹,

Venegas²,

Fontes³

et al. 2017

Biosci. J.

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Silicon applied to substrate for greenhouse cultivation of ornamental pot plants can improve the yield and quality of the ornamental product; however, the possible anatomical and physiological changes caused by Si have to be assessed. Therefore, the objective of this study was to evaluate gas exchange rates and leaf anatomy of ornamental sunflower 'Sunbright' grown on a substrate amended with Si. The experiment was conducted in a greenhouse, and the treatments consisted of sunflower plants cultivated in pots containing 600 g substrate fertilized with Si at rates of 0, 0.25, 0.50, 0.75, and 1.00 g kg -1 . The treatments were arranged in randomized complete block design and four replications. Samples from the middle region of leaf blades in the sixth pair from the apex were collected and analyzed morphometrically. Epidermal trichomes were analyzed using diaphanization and scanning electron microscopy with energy-dispersive X-ray spectroscopy. The following traits were determined: leaf blade thickness, palisade and spongy parenchyma thickness, mesophyll thickness, and abaxial and adaxial epidermis thickness. Net photosynthesis, stomatal conductance and transpiration rates were determined in the fifth leaf at the beginning of the flowering stage by an infrared gas analyzer. The data were subjected to ANOVA and regression analyses. The results indicate that the ornamental sunflower 'Sunbright' accumulates Si in leaf trichomes, and that leaf thickness is not affected by Si application to the substrate; however, transpiration rates decrease while net photosynthesis rate and stomatal conductance increase in response to Si application.

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Section: Methodsmentioning

confidence: 99%

Leaf anatomy and gas exchange of ornamental sunflower in response to silicon application

Júnior¹,

Venegas²,

Fontes³

et al. 2017

Biosci. J.

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“…Silicon supplementation to composite substrates that contain little available Si, such as organic and sand substrates, is reported to have positive effects on plants (Zanão Júnior et al 2013). The main positive effects also include flowers with better quality and greater longevity (Jana & Jeong 2014).…”

Section: Palavras-chave: Gladiolus X Grandiflorusmentioning

confidence: 99%

“…Carvalho et al (2013) found that the application of Si to the Dendrobium nobile orchid increased flower production and longevity. Ornamental plants, such as aster, clove, chrysanthemum, geranium, sunflower, petunia, rose, vinca and zinnia, accumulate Si in their tissues in amounts ranging 0.21-32.8 g kg -1 , depending on the species (Carvalho et al 2009, Hogendorp et al 2012, Zanão Júnior et al 2013, Park et al 2016. Beneficial effects of supplemental Si have been observed in many of these species, and these effects vary and strongly depend on the species, and even the cultivar (Jana & Jeong 2014, Park et al 2016 Many substrates for ornamental plants contain very low levels of plant-available Si.…”

Section: Palavras-chave: Gladiolus X Grandiflorusmentioning

confidence: 99%

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Gladiolus production and nutritional status as a function of silicon application to the substrate1

Carvalho-Zanão

Villa

Júnior

2017

Pesqui. Agropecu. Trop.

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Gladiolus is among the most traditional and important cut flowers in Brazil. Silicon (Si) is an element that has increased the production and quality of some ornamental plants. This study aimed at evaluating the production and nutritional status of gladiolus cultivars under greenhouse conditions, according to the Si doses applied to the substrate. The experimental design was randomized blocks, in a 3 x 4 factorial scheme, being three gladiolus cultivars ('White Friendship', 'Rose Friendship' and 'Red Beauty') and four Si doses (0 mg dm-3, 150 mg dm-3, 300 mg dm-3 and 600 mg dm-3), with five replicates. Morphological traits and leaf Si, macro and micronutrients were evaluated. 'White Friendship' and 'Red Beauty' developed taller plants, with a higher diameter and spikes heavier and longer than 'Rose Friendship'. The order of leaf nutrient concentrations for all the cultivars evaluated was the same (K > N > Ca > Mg > S > P > Fe > Mn > B > Zn > Cu), with all of them being classified as Si non-accumulators. Neither the evaluated morphological variables, nor the uptake of the nutrients N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn, were affected by the Si supplementation, suggesting that the addition of Si to the substrate does not enhance the gladiolus production.

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“…The rose has the ability to uptake large amounts of soil nutrients, especially Fe, which is the micronutrient uptaken in greater quantities by many cultivars of this ornamental plant (VILLAS BÔAS et al, 2008;ZANÃO JÚNIOR et al, 2013). Fe is important in maintaining the quality of plants.…”

Section: Introductionmentioning

confidence: 99%

Iron doses in the production of potted rosebushes

et al. 2017

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The production and quality of roses are influenced by fertilization management. The aim of this experiment was to evaluate the effects of doses of iron (Fe) in the production of potted rose bushes ( Rosa hybrida ). Treatments were based on five doses of Fe (0, 1, 3, 5 and 15mg kg-1) applied on the substrate, in a randomized block design with four replications. Seedlings presented two pairs of leaves and were individually transplanted into plastic pots (0.8dm3) containing commercial substrate. Each experimental plot consisted of a vase with a plant with two flower stalks. The following parameters were evaluated: number of leaves and flowers per flower stalk; dry matter production of roots, leaves and flowers; plant height and diameter and floral longevity. In addition, foliar levels of total chlorophyll and Fe were determined. Fertilization with Fe increases the production and quality of flowers of the rosebush cv. 'Shiny Terrazza' (r). Dose of Fe to be added to the substrate used in this study for maximum economic efficiency for this cultivar is 3.6mg kg-1.

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Produção de rosas influenciada pela aplicação de doses de silício no substrato

Cited by 9 publications

References 25 publications

Leaf anatomy and gas exchange of ornamental sunflower in response to silicon application

Leaf anatomy and gas exchange of ornamental sunflower in response to silicon application

Gladiolus production and nutritional status as a function of silicon application to the substrate1

Iron doses in the production of potted rosebushes

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