Effect of humic acid as an additive to growing media to enhance the production of eggplant and tomato transplants

Osman, A.; Rady, Mostafa M.

doi:10.1080/14620316.2014.11513074

Cited by 66 publications

(29 citation statements)

References 1 publication

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“…Membrane permeability of both maize cultivars was increased as shown an increased electrolyte leakage (EL) by salinity, while foliar application of HA reduced EL under saline conditions as earlier reported by Tuna et al (2007) in tomato plants exposed to saline stress. Similarly, Osman and Rady (2014) also reported that the membrane permeability was improved by HA application in eggplant. In contrast to our results, Jamil et al (2012) observed that membrane permeability decreased in sugar beet plants due to HA application.…”

Section: Discussionmentioning

confidence: 83%

Exogenous application of humic acid mitigates salinity stress in maize (Zea mays L.) plants by improving some key physico-biochemical attributes

Kaya

Akram

Ashraf

et al. 2018

Cereal Research Communications

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Application of salt stress (100 mM) through root growing medium caused a considerable decrease in plant fresh and dry biomass, maximum quantum yield (F v /F m), chlorophyll contents, leaf water potential, and leaf Ca, K, P and N concentrations of two maize cultivars (Apex 836 and DK 5783). However, salt-induced increase was observed in leaf osmolality (LO), proline, hydrogen peroxide (H 2 O 2), malondialdehyde (MDA), Na + concentration and activities of enzymatic antioxidants, such as catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD). Of five humic acid (HA) levels used under non-stress and stress conditions in an initial experiment, 100 mg L-1 was chosen for subsequent studies. Exogenous application of humic acid (HA) at the rate of 100 mM as a foliar or pre-sowing seed treatment significantly increased the plant biomass, F v /F m , chlorophyll pigments and proline contents, while it considerably reduced the leaf water potential, H 2 O 2 and MDA contents as well as the activities of all the afore-mentioned enzymatic antioxidants. Of both modes of exogenous treatment, foliar spray was better in improving plant biomass, chlorophyll contents, LO, leaf Na + as well as the accumulation of all nutrients measured, however, in contrast, seed pre-treatment was more effective in altering leaf proline, H 2 O 2 and MDA contents. Of both maize cultivars, cv. DK 5783 excelled in plant biomass, chlorophyll contents and leaf N, Ca and K concentrations as well as in the activities of all three antioxidant enzymes, whereas cv. Apex 836 was superior in leaf Na + and P concentrations, H 2 O 2 and MDA contents. Cv. DK 5783 was comparatively better in salt tolerance as compared to cv. Apex 836. Overall, exogenous application of HA was effective in improving salinity tolerance of maize plants which can be attributed to HA-induced increase in plant biomass, chlorophyll contents, mineral nutrients and activities of key antioxidant enzymes.

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Section: Discussionmentioning

confidence: 83%

Exogenous application of humic acid mitigates salinity stress in maize (Zea mays L.) plants by improving some key physico-biochemical attributes

Kaya

Akram

Ashraf

et al. 2018

Cereal Research Communications

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“…Relative water contents (RWC) in the roots of wheat plants were assessed by using the method of WEATHERLEY 41 with some modification of Osman and Rady 42 . Similarly, the method of Premachandra et al 43 with some modifications by Rady, et al 16 was used to measure membrane stability index (MSI).…”

Section: Methodsmentioning

confidence: 99%

Alleviatory effects of Silicon on the morphology, physiology, and antioxidative mechanisms of wheat (Triticum aestivum L.) roots under cadmium stress in acidic nutrient solutions

Rahman

ZhiJuan

et al. 2021

Sci Rep

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Silicon (Si), as a quasi-essential element, has a vital role in alleviating the damaging effects of various environmental stresses on plants. Cadmium (Cd) stress is severe abiotic stress, especially in acidic ecological conditions, and Si can demolish the toxicity induced by Cd as well as acidic pH on plants. Based on these hypotheses, we demonstrated 2-repeated experiments to unfold the effects of Si as silica gel on the root morphology and physiology of wheat seedling under Cd as well as acidic stresses. For this purpose, we used nine treatments with three levels of Si nanoparticles (0, 1, and 3 mmol L−1) derived from sodium silicate (Na2SiO3) against three concentrations of Cd (0, 50, and 200 µmol L−1) in the form of cadmium chloride (CdCl2) with three replications were arranged in a complete randomized design. The pH of the nutrient solution was adjusted at 5. The averages of three random replications showed that the mutual impacts of Si and Cd in acidic pH on wheat roots depend on the concentrations of Si and Cd. The collective or particular influence of low or high levels of Si (1 or 3 mM) and acidic pH (5) improved the development of wheat roots, and the collective influence was more significant than that of a single parallel treatment. The combined effects of low or high concentrations of Cd (50 or 200 µM) and acidic pH significantly reduced root growth and biomass while increased antioxidants, and reactive oxygen species (ROS) contents. The incorporation of Si (1 or 3 mmol L−1) in Cd-contaminated acidic nutrient solution promoted the wheat root growth, decreased ROS contents, and further increased the antioxidants in the wheat roots compared with Cd single treatments in acidic pH. The demolishing effects were better with a high level of Si (3 mM) than the low level of Si (1 Mm). In conclusion, we could suggest Si as an effective beneficial nutrient that could participate actively in several morphological and physiological activities of roots in wheat plants grown under Cd and acidic pH stresses.

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“…Excluding the midrib, fresh 2 cm-diameter fully-expanded leaf discs were used to determine the RWC% as described by Weatherly (1950) with some modifications (Osman and Rady, 2014). The discs were weighed (fresh mass; FM) and immediately floated on doubledistilled water in Petri dishes for 24 h, in the dark, to saturate them with water.…”

Section: Determination Of Leaf Pigment Concentrationsmentioning

confidence: 99%

Modulation of salt stress effects on the growth, physio-chemical attributes and yields of Phaseolus vulgaris L. plants by the combined application of salicylic acid and Moringa oleifera leaf extract

Rady

Mohamed

2015

Scientia Horticulturae

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135

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Effect of humic acid as an additive to growing media to enhance the production of eggplant and tomato transplants

Cited by 66 publications

References 1 publication

Exogenous application of humic acid mitigates salinity stress in maize (Zea mays L.) plants by improving some key physico-biochemical attributes

Exogenous application of humic acid mitigates salinity stress in maize (Zea mays L.) plants by improving some key physico-biochemical attributes

Alleviatory effects of Silicon on the morphology, physiology, and antioxidative mechanisms of wheat (Triticum aestivum L.) roots under cadmium stress in acidic nutrient solutions

Modulation of salt stress effects on the growth, physio-chemical attributes and yields of Phaseolus vulgaris L. plants by the combined application of salicylic acid and Moringa oleifera leaf extract

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