Gas exchange and chlorophyll a fluorescence parameters of ornamental bromeliads

Silva, Karina Gonçalves da; Silva, Emerson Alves da; Ferreira, Maurí­cio Lamano; Kanashiro, Shoey; Camargo, Plínio Barbosa de; Tavares, Armando Reis

doi:10.14295/oh.v23i4.1064

Cited by 7 publications

(4 citation statements)

References 22 publications

(24 reference statements)

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“…Chlorophyll a fluorescence (Multi-Mode Chlorophyll Fluorometer OS5p ® , Opti-Sciences, Hudson, USA) and gas exchange (Infrared Gas Analyzer LCpro + , ADC BioScientific Ltd. Global House, Hertfordshire, UK) were evaluated as described by Silva et al (2017). The plants were sectioned into leaves, stems and roots and weighed to obtain fresh mass.…”

Section: Methodsmentioning

confidence: 99%

Nutrition and physiology of hybrid Eucalyptus urograndis in soil fertilized with sewage sludge

Zabotto¹,

Gomes²,

Mateus

et al. 2020

Emir J Food Agric

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Sewage sludge is a residual pollutant product from the treatment of urban effluent and must be adequately processed before final disposal in order to avoid environmental contamination. The use of sewage sludge in agricultural and forestry areas can improve the physical, chemical and biological properties of soil; it can also be a source of nutrients, increasing crop productivity. Accordingly, this study aimed to evaluate the growth and development of hybrid Eucalyptus urograndis (Eucalyptus grandis x E. urophylla) seedlings cultivated in soil with different doses of sewage sludge. To accomplish this, hybrid E. urograndis seedlings were cultivated for 120 days in pots containing soil (dystrophic Red-Yellow Latosol -LVA) with different doses of sewage sludge (0, 30, 60 or 90 Mg ha-1). The experiment was carried out in a randomized complete block design consisting of four treatments, three replications with four plants per replication, totaling 48 plants. Biometric, biomass and physiological variables (chlorophyll, gaseous exchange, stomatal conductance and transpiration); in addition to macro- and micronutrient contents in leaves and soils of each treatment were evaluated. The treatments with sewage sludge were statistically superior to control treatment for all variables. Therefore, we recommend the application of 60 Mg ha-1 sewage sludge for the growth of hybrid Eucalyptus urograndis seedlings. Conversely, 90 Mg ha-1 sewage sludge inhibited hybrid E. urograndis root growth. Moreover, the use of sewage sludge as organic fertilizer in tropical soils is a viable and sustainable alternative for Eucalyptus cultivation.

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Section: Methodsmentioning

confidence: 99%

Nutrition and physiology of hybrid Eucalyptus urograndis in soil fertilized with sewage sludge

Zabotto¹,

Gomes²,

Mateus

et al. 2020

Emir J Food Agric

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“…Techniques of in vitro culture allow the large-scale multiplication of several plant species, including bromeliads (Martins et al, 2018a, b;Rosa et al, 2018). Bromeliads have commercial value to the horticultural industry due to their use in landscaping and interior decoration (Silva et al, 2017). Alcantarea imperialis (Carrière) Harms (subfamily Tillandsioideae) is a bromeliad species of ornamental interest.…”

Section: Introductionmentioning

confidence: 99%

Modulation of the anatomical and physiological responses of in vitro grown Alcantarea imperialis induced by NAA and residual effects of BAP

et al. 2020

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During in vitro propagation, cytokinins (CKs) and auxins (AUXs), such as 6-benzylaminopurine (BAP) and 1-naphthaleneacetic acid (NAA), are often used to induce adventitious shoots and roots, respectively. However, it is not clear how CKs affect plants over a long period of in vitro propagation as well as the synergy of direct exposure to AUX with previous CK treatments. The aim was to assess the physiological and anatomical responses of Alcantarea imperialis in function of the interaction of both previous BAP treatments and direct NAA exposure during in vitro propagation. Plants previously grown in vitro were transferred to media containing 0, 5, 10 or 15 μM BAP. After 60 days, the adventitious shoots from each previous BAP treatment were subcultured in media with 0, 2 or 4 μM NAA. Pigment content, anatomical and growth traits were assessed in the plants from each treatment. Both previous BAP treatments and direct NAA exposure altered the anatomy and pigment contents of plants as well as their growth traits. BAP induced negative effects over the long term on physiological status as well as changed the plants’ anatomy. NAA supplementation in the medium can partially reverse the negative effects induced by BAP. The application of 2 μM NAA during in vitro rooting improved the plants’ quality.

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“…Gas exchange and plant growth of Guzmania lingulata (L.) Mez. fertigated through roots were comparable with those fertigated through tank (Silva et al, 2017).…”

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confidence: 67%

Daily Evapotranspiration of Guzmania ‘Irene’ and Vriesea ‘Carly’ Bromeliads Produced in a Shaded Greenhouse

Beeson

Chen

2018

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Additional index words. actual evapotranspiration (ET A ), bromeliad daily water use, daily water requirements, ornamental foliage plants, water need index (WNI)Abstract. Bromeliads are important ornamental foliage plants, but until now, their daily water use during production was unknown. Using a canopy closure model developed for container-grown woody ornamental plants, in this study we investigated actual evapotranspiration (ET A ) of Guzmania 'Irene' and Vriesea 'Carly' from tissue-cultured liners grown in 15-cm containers to marketable sizes in a shaded greenhouse. The mean daily ET A of Guzmania 'Irene' ranged from 4.02 to 66.35 mL per plant, and the mean cumulative ET A was 16.66 L over a 95-week production period. The mean daily ET A of Vriesea 'Carly' varied from 3.98 to 59.89 mL per plant, and the mean cumulative ET A was 15.52 L over the same production period as the Guzmania cultivar. The best-fit models for predicting daily ET A of the two bromeliads were developed, which had correlation coefficients (r 2 ) of 0.79 for Guzmania 'Irene' and 0.68 for Vriesea 'Carly'. The success in the model of ET A for both bromeliads suggested that the canopy closure model was equally applicable to container-grown ornamental foliage plants produced in greenhouse conditions. The daily ET A and cumulative ET A values represent researchbased information on water requirements, and, when applied, could improve irrigation practices in bromeliad production. This study also showed that roots per se of the two epiphytic bromeliads were able to absorb water and nutrients from a peat-based container substrate and support their complete life cycles.

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Gas exchange and chlorophyll a fluorescence parameters of ornamental bromeliads

Cited by 7 publications

References 22 publications

Nutrition and physiology of hybrid Eucalyptus urograndis in soil fertilized with sewage sludge

Nutrition and physiology of hybrid Eucalyptus urograndis in soil fertilized with sewage sludge

Modulation of the anatomical and physiological responses of in vitro grown Alcantarea imperialis induced by NAA and residual effects of BAP

Daily Evapotranspiration of Guzmania ‘Irene’ and Vriesea ‘Carly’ Bromeliads Produced in a Shaded Greenhouse

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