Evaluation of potential of Epipremnum aureum Engl. in removing zinc (Zn) toxicity

ABSTRACT Climbing Epipremnum aureum plants develop larger leaves than unsupported, hanging plants. This effect may be regarded, in part, as a thigmomorphogenic response, but gravimorphogenetic effect may also be involved, since polar auxin transport is known to be negatively affected in plants with horizontal or hanging stems, which may result in an altered hormone balance at the whole plant level. The present work was aimed at studying how exogenous auxins and cytokinins may influence growth of E. aureum rooted cuttings under different training systems. Rooted cuttings of E. aureum were cultivated either climbing on an upright wooden board or creeping on the glasshouse bench or hanging from a basket. All leaves of each plant were sprayed to run-off at sunset with four indole-3-acetic acid (IAA) doses 7 days after transplanting and one week later, with four benzylaminopurine (BAP) concentrations, rendering 16 hormone combination treatments. The application of IAA or BAP at 50 mg L-1 to creeping and hanging plants significantly promoted growth but, in climbing plants, a negative effect was generally observed. Changes in net assimilation and photosynthetic rates, together with modified allometric coefficients, accounted for these responses. The higher growth promotion by exogenous growth regulators observed in creeping or hanging plants compared to climbing plants, may be interpreted mostly as a gravimorphogenetic response.

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Identifikasi Pemeliharaan Vertical Garden di Fairmont Sanur Beach Bali

Jurnal Arsitektur Lansekap ◽

10.24843/jal.2021.v07.i02.p01 ◽

2021 ◽

pp. 153

Author(s):

Ni Luh Putu Ari Radinasuari ◽

Cokorda Gede Alit Semarajaya ◽

I Made Sukewijaya

Keyword(s):

Study Data ◽

Literature Study ◽

Maintenance System ◽

Epipremnum Aureum ◽

Portulaca Grandiflora ◽

Schefflera Arboricola ◽

The Media ◽

Maintenance Systems ◽

Water Disposal ◽

Maintenance Process

Maintenance Identification on Vertical Garden at Fairmont Sanur Beach Bali. Fairmont Sanur Beach Bali has a vertical garden with an area of 10 m x 4 m. The Hotel is able to maintain the plant condition. The purpose of this research is to identify the vertical garden maintenance system at the Fairmont Sanur Beach Bali. The research method uses survey and literature study methods. Data collection techniques are observation, interview, and literature study. Data analysis methods with descriptive methods and scoring tables. The results about the identification of vertical garden maintenance systems consist of watering, water disposal system, trimming, fertilizing, replanting plants, media replacement, sanitation, pest and disease control. Watering in 2 hours creating high humidity in the media. The volume of water released is not fully experienced evapotranspiration. The planting media do not experience drought during the day, so the plants keep fresh. In the calculation of plant suitability values, the corresponding values are Hemigraphis alternata. Plants with adequate value are Epipremnum aureum, Asparagus densiflorus, Ananas bracteatus tricolor, Schefflera Arboricola, and Portulaca grandiflora. In the maintenance process requires a fertigation system to facilitate fertilization. The use of automated systems such as timmers will simplify the maintenance and a more scheduled.

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Silicon-Mediated Enhancement of Heavy Metal Tolerance in Rice at Different Growth Stages

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph15102193 ◽

2018 ◽

Vol 15 (10) ◽

pp. 2193 ◽

Cited By ~ 12

Author(s):

Fei Huang ◽

Xiao-Hui Wen ◽

Yi-Xia Cai ◽

Kun-Zheng Cai

Keyword(s):

Heavy Metal ◽

Metal Tolerance ◽

Heavy Metal Tolerance ◽

Membrane Integrity ◽

Dry Weight ◽

Growth Stages ◽

Photosynthetic Parameters ◽

Cell Membrane Integrity ◽

Zn Toxicity ◽

Different Growth Stages

Silicon (Si) plays important roles in alleviating heavy metal stress in rice plants. Here we investigated the physiological response of rice at different growth stages under the silicon-induced mitigation of cadmium (Cd) and zinc (Zn) toxicity. Si treatment increased the dry weight of shoots and roots and reduced the Cd and Zn concentrations in roots, stems, leaves and grains. Under the stress of exposure to Cd and Zn, photosynthetic parameters including the chlorophyll content and chlorophyll fluorescence decreased, while the membrane permeability and malondialdehyde (MDA) increased. Catalase (CAT) and peroxidase (POD) activities increased under heavy metals stress, but superoxide dismutase (SOD) activities decreased. The magnitude of these Cd- and Zn-induced changes was mitigated by Si-addition at different growth stages. The available Cd concentration increased in the soil but significantly decreased in the shoots, which suggested that Si treatment prevents Cd accumulation through internal mechanisms by limiting Cd2+ uptake by the roots. Overall, the phenomena of Si-mediated alleviation of Cd and excess Zn toxicity in two rice cultivars could be due to the limitation of metal uptake and transport, resulting in an improvement in cell membrane integrity, photosynthetic performance and anti-oxidative enzyme activities after Si treatment.

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AIR QUALITY IMPROVEMENT USING ORNAMENTAL PLANTS IN CLASSROOMS

Journal of Green Building ◽

10.3992/jgb.16.2.201 ◽

2021 ◽

Vol 16 (2) ◽

pp. 201-216

Author(s):

Wannawit Taemthong

Keyword(s):

Carbon Dioxide ◽

Air Quality ◽

Indoor Air Quality ◽

Indoor Air ◽

Ornamental Plants ◽

Flux Chamber ◽

Epipremnum Aureum ◽

Air Quality Improvement ◽

Carbon Dioxide Levels ◽

Reduce Carbon Dioxide

ABSTRACT The purpose of this research is to investigate how indoor air quality might be improved by installing particular ornamental plants available in Thailand. Traditionally, ventilation fans have been used to encourage fresh air into living areas in order to reduce CO2 levels. This consumes more energy than using ornamental plants. Our research screens three types of ornamental plants and selects one to investigate its potential for enhancing indoor air quality by reducing carbon dioxide levels. The three plants are epipremnum aureum, spathiphyllum wallisei, and dieffenbachia sp. The propensity to reduce carbon dioxide levels of each plant was preliminary screened using a closed flux chamber method over a 24-hour period. It was found that epipremnum aureum had the ability to absorb carbon dioxide better than the others. The epipremnum aureum was then put in a classroom to investigate variables in two further experiments. The ability to improve air quality in terms of sensitivity to various light concentrations and the number of plants in the room are explored. It was found that epipremnum aureum should be placed within a distance of 1.5 meters from windows to achieve the appropriate light concentration to enhance indoor air quality. It was also found that 150 pots of epipremnum aureum had the propensity to reduce CO2 by 430 ppm in a classroom of 20 students for an 80-minute class. The use of sufficient amounts of epipremnum aureum can improve air quality in classrooms. A model to estimate numbers of such plants needed in classrooms is also presented.

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Epipremnum aureum Keratopathy: Case Report and Review of the Literature

Eye & Contact Lens Science & Clinical Practice ◽

10.1097/icl.0000000000000675 ◽

2019 ◽

Vol 46 (5) ◽

pp. e33-e39

Author(s):

Adam K. Cohen ◽

Despoina Theotoka ◽

Anat Galor

Keyword(s):

Case Report ◽

Review Of The Literature ◽

Epipremnum Aureum

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The effect of zinc supply and succinate treatment on plant growth and mineral uptake in pea plant

Brazilian Journal of Plant Physiology ◽

10.1590/s1677-04202002000200005 ◽

2002 ◽

Vol 14 (2) ◽

pp. 111-116 ◽

Cited By ~ 43

Author(s):

Zlatimira Stoyanova ◽

Snejana Doncheva

Keyword(s):

Pisum Sativum ◽

Plant Growth ◽

Organic Anion ◽

Mineral Uptake ◽

Stress Indicators ◽

Zn Toxicity ◽

Pisum Sativum L ◽

Ameliorative Effect ◽

Stems And Leaves ◽

As Stress

The influence of succinate treatment on Zn toxicity was investigated using plant growth and mineral uptake as stress indicators. Pea plants (Pisum sativum L., cv. Citrine) were treated with various Zn concentrations (0.67 to 700 muM Zn) in the presence and absence of 0.2 mM Na-succinate. Plants pre-treated with succinate and then exposed to Zn exhibited higher dry root, stem and leaf weight than the plants treated with Zn alone. An increase in Zn supply resulted in a decrease in the concentrations of Ca, Mg, P in the roots and an increase of Ca and N levels in the stems and leaves. The amount of Zn in the roots, stems and leaves increased with greater Zn rates. The succinate treatment increased P in the roots but did not affect the Ca, N and Mg contents in Zn-treated plants. Most of the Zn taken up was retained in the roots after succinate treatment. The ameliorative effect of succinate on plant growth could be due to a lower Zn translocation in the leaves and stems and increased Zn accumulation in the roots. Lower Zn translocation in aboveground parts seemed to result from Zn complexing by organic anion in the roots. This probably caused less Zn transport to the stems and leaves and suggested that succinate has potential for complexing with Zn and may play a role in tolerance to high Zn levels.

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