Hormone‐Containing Products' Impact on Antioxidant Status of Tall Fescue and Creeping Bentgrass Subjected to Drought

Zhang, Xunzhong; Schmidt, R. E.

doi:10.2135/cropsci2000.4051344x

Cited by 191 publications

(131 citation statements)

References 17 publications

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“…Similar observations were reported following the foliar application of seaweed extract on alfalfa plants at a rate of 300 g, which resulted in increased plant macro/micro elements such as N, P, K, Fe, Mn, and Zn [43]. These results suggest that seaweed extract may have the ability to improve stress tolerance [44] [45] by increasing nutrient uptake from the soil [46]. The beneficial effect of seaweed extract may be the result of many components working synergistically at different concentrations [47] especially those derived from Ascophyllum nodosum, which were reported to have high concentrations of total phenolics, a complex group known for its strong chelating activities [48] [49].…”

Section: Plant Tissue Chemical Characteristicssupporting

confidence: 83%

Effect of Plant Growth Stimulants on Alfalfa Response to Salt Stress

El-Sharkawy¹,

Al-Shal²,

Missaoui³

2017

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Salinity is a major impediment to crop production. This study was undertaken to compare the effect of seaweed extract, humic acid, and potassium sulfate nanoparticles in alleviating salt stress in Alfalfa (Medicago sativa L.). Seeds of ten alfalfa genotypes were germinated in a growth chamber at five salt concentrations (0%, 0.5%, 1.0%, 1.5%, and 2.00%). Salt concentrations above 1% reduced seed germination by more than 70% in most genotypes. One salt tolerant genotype (Mesa-Sirsa) and one salt sensitive (Bulldog 505) were selected and planted in greenhouse pots containing 2 kg of sand and subjected to two salt levels (10 and 15 dS·m . Plant biomass was reduced under both salt concentrations in both genotypes, with a greater magnitude in the salt sensitive genotype. Application of seaweed extract resulted in higher relative water content and proline under both salt concentrations (10 and 15 dS·m −1 ) in the salt sensitive genotype, and lower electrolyte leakage in both salt tolerant and salt sensitive genotypes, under both salt concentrations. Seaweed extract also resulted in higher catalase and SOD activities in both genotypes under 10 dS·m −1 . Catalase and SOD activities were associated with significantly (p < 0.01) reduced electrolyte leakage and increased shoot dry weight. Overall, seaweed extract seemed to have a positive effect in alleviating salt stress in alfalfa.

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Section: Plant Tissue Chemical Characteristicssupporting

confidence: 83%

Effect of Plant Growth Stimulants on Alfalfa Response to Salt Stress

El-Sharkawy¹,

Al-Shal²,

Missaoui³

2017

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“…EDTA application to soil not only increased heavy metal availability in soils but also enhanced heavy metal content of the plant organs. This situation can be explained partly by their chelating capacity (Zhang and Schmidt 2000, Evangelou and Marsi 2001, Zhang et al 2003. When EDTA is added to soil containing heavy metals (Cu, Cd, Pb and Zn), EDTA complex the soluble form of heavy metal.…”

Section: Resultsmentioning

confidence: 99%

Phytoremediation based on canola (Brassica napus L.) and Indian mustard (Brassica juncea L.) planted on spiked soil by aliquot amount of Cd, Cu, Pb, and Zn

Turan¹,

Esringü²

2007

PLANT SOIL ENVIRON

125

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The use of plants to remove heavy metals from soil (phytoremediation) is expanding due to its cost-effectiveness as compared to conventional methods and it has revealed a great potential. Since contaminants such as Pb or Cd have a limited bioavailability in the soil, methods to facilitate their transport to the shoots and roots of plants are required for successful phytoremediation. The objective of this study was to investigate the effects of addition of different rates (0, 3, 6 and 12 mmol/kg) of ethylene diaminetetraacetate (EDTA) on heavy metal availability in soils contaminated with 50 mg/kg Cd (CdCl 2 ), 50 mg/kg Cu (CuSO 4 ), 50 mg/kg Pb [Pb(NO 3 ) 2 ] and 50 mg/kg Zn (ZnSO 4 ), and on the capacity of canola (Brassica napus L.) and Indian mustard (Brassica juncea L.) plants to uptake Cu, Cd, Pb and Zn in a growth chamber. Results indicated that EDTA application increased heavy metal availability and uptake by plants. Significant differences were obtained in both species and plant parts. As for plant species tested, canola was more effective in the uptake of Cu, Cd, Pb and Zn. Root heavy metal uptake of both species was higher than shoot heavy metal uptake.

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“…The presence of micro-nutrients, especially Fe, in humic acids or their colloidal nature make them have a positive effect on the growth of various groups of micro-organisms which may excrete a range of vitamins, hormone-like growth substances and antibiotics that may further promote the growth (Nardi et al, 2002). In addition Zhang & Schmidt (2000), Nardi et al (2002) and Zhang & Ervin (2004) reported that humic acids contain cytokinins and have auxin-like activity. In addition, Rady and Osman (2011) stated that humic acid may stimulate plant growth by acting as a plant growth regulator.…”

Section: Morphological Charactersmentioning

confidence: 99%

“…These increments may due to the vigorous growth of plants resulted in the hormone-like activities of the humic acid through their involvement in increasing, photosynthesis, oxidative phosphorylation, protein synthesis, antioxidant and various enzymatic reactions. (Muscolo et al, 1993 andSchmidt, 2000). In addition, HA has been claimed to promote plant growth by increasing cell membrane permeability, oxygen uptake and photosynthesis, nutrient uptake, and root cell elongation (Russo & Berlyn, 1990, Böhme & Thi Lua, 1997and Nardi et al, 2002.…”

Section: Yield and Its Componentsmentioning

confidence: 99%

Increasing Nitrogen Efficiency by Humic Acid Soil Application to Squash Plants (Cucurbita pepo L.) Grown in Newly Reclaimed Saline Soil

2014

NIDOC-ASRT

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WO FILED seasons were conducted during the summer seasons of 2010 and 2011 in the Experimental Farm at Demo, Faculty of Agriculture, Fayoum University, to increase nitrogen efficiency (ammonium nitrate 33.5% N, 150, 200, 250 and 300 kg fed -1 ) under three concentrations of humic acid as water solution 0.5, 1.0 and 1.5gL -1 , in addition to the untreated as control to squash plants (Cucurbita pepo L.) (cv. Amjjed hybrid) grown in newly reclaimed saline soil..In comparison with control, all other rates significantly increased vegetative growth plant characters (i.e. number of leaves plant -1 , stem length, total leaf area plant -1 , leaf area leaf -1 and also, leaves, stem and canopy dry weight plant -1 ) as well as fruit yield and its components (i.e. number of fruits plant -1 , yield plant -1 and total yield of fruits fed -1 ) except average of fruit weight. In addition, the concentrations of N, P and K % in leaves were increased, and Na and Cl were decreased. The same results were obtained with all nitrogen fertilizer rates, 200, 250 and 300 kg ammonium nitrate fed -1 as compared to the 150 kg fed -1 with some exceptions, P% was not affected and K% was decreased with increasing the rate of nitrogen.In view of the above mentioned results, it has been concluded that the efficiency of nitrogen fertilization increased with soil application of humic acid reflected on the growth and chemical composition and yield of squash (cv. Amjjed hybrid), and was the best treatment: the water solution of humic acid (1.5gL -1 ), with nitrogen fertilizer (250 kg) ammonium nitrate fed -1 where given a significant increase of total squash fruits yield fed -1 grown in newly reclaimed saline soil.

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Hormone‐Containing Products' Impact on Antioxidant Status of Tall Fescue and Creeping Bentgrass Subjected to Drought

Cited by 191 publications

References 17 publications

Effect of Plant Growth Stimulants on Alfalfa Response to Salt Stress

Effect of Plant Growth Stimulants on Alfalfa Response to Salt Stress

Phytoremediation based on canola (Brassica napus L.) and Indian mustard (Brassica juncea L.) planted on spiked soil by aliquot amount of Cd, Cu, Pb, and Zn

Increasing Nitrogen Efficiency by Humic Acid Soil Application to Squash Plants (Cucurbita pepo L.) Grown in Newly Reclaimed Saline Soil

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