The Effect of Different Amino Acids on the Development of Cucumber (Cucumis sativus L.) Plant Species growing in Düzce Region

Abstract The study presents the results of research on the acute toxicity of a fertilizer formulas made of spent coffee ground (SCG) with addition of ash from low-temperature combustion of biomass or ash with an admixture of magnesium sulphate and blood meal. The experimental fertilizer formulas included also rape oil used as a plasticizer for controlling the nutrients release from the fertiliser. Mustard (Sinapis alba L.), oats (Avena sativa sp. L.), cucumber (Cucumis sativus L.) and cress (Lepidium sativum L.) were used as test plants species in the experiment. The toxicity tests were performed using a standard procedure of 72 h with the use of Phytotoxkit microbiotest and fertilizer application of 2.5; 5 and 10% (v/v). The obtained results indicated an increase of acute toxicity for all tested plant species, proportionally to the applied doses of the fertilizer. During the 72 h period, the strongest inhibition of seedling growth was recorded in samples consisting of 10% of the tested fertilizers, particularly when they showed considerable level of salinity or low pH values. From the tested plant species, cress (Lepidium sativum L.) turned out to be the most sensitive to the applied fertilizers, the least was cucumber (Cucumis sativus L.) for which only a small inhibition of root system growth was observed. The inhibited growth of roots could be attributed to a reduced oxygen access and excessive salinity of the substratum caused by the applied additives.

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The Effect of Foliar-Applied Manganese in Mineral and Complex Forms with Amino Acids on Certain Defense Mechanisms of Cucumber (Cucumis sativus L.) Against Powdery Mildew

Journal of Plant Growth Regulation ◽

10.1007/s00344-017-9747-x ◽

2017 ◽

Vol 37 (2) ◽

pp. 481-490 ◽

Cited By ~ 10

Author(s):

S. Eskandari ◽

A. H. Khoshgoftarmanesh ◽

B. Sharifnabi

Keyword(s):

Amino Acids ◽

Powdery Mildew ◽

Cucumis Sativus ◽

Defense Mechanisms ◽

Cucumis Sativus L ◽

Complex Forms

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Transpiration-dependent passive silica accumulation in cucumber (Cucumis sativus) under varying soil silicon availability

Botany ◽

10.1139/b2012-072 ◽

2012 ◽

Vol 90 (10) ◽

pp. 1058-1064 ◽

Cited By ~ 22

Author(s):

Shaji Faisal ◽

Kristine L. Callis ◽

Martijn Slot ◽

Kaoru Kitajima

Keyword(s):

Cucumis Sativus ◽

Plant Species ◽

Relative Importance ◽

Passive Transport ◽

Cucumis Sativus L ◽

Silica Deposition ◽

Unit Leaf ◽

Leaf Tissues ◽

High Concentrations ◽

Active Processes

Regulation of the uptake of silicon (Si) varies among plant species; some species may passively transport Si, through transpiration, from soils to shoots, while others actively transport silica and deposit it in leaf tissues at high concentrations. Cucumber ( Cucumis sativus L.) accumulates moderate amounts of silica in leaves, but the relative importance of passive and active processes pertaining to silica accumulation is poorly understood. In a factorial experiment with cucumber seedlings, we manipulated transpiration rates by changing humidity and air movements around pot-grown plants receiving a daily supply of solutions containing 0, 1, 1.5, and 2 mmol Si·L–1. Higher transpiration rates resulted in significantly greater Si per unit leaf mass after 4 days, suggesting that passive processes affect the rate of silica accumulation. Actual silica accumulation during the 4-day period was significantly higher than the expected accumulation attributable to passive transport alone in 1 and 1.5 mmol Si·L–1 treatments, while passive processes alone could account for the actual silica accumulation at 2 mmol Si·L–1. We conclude that the relative importance of active and passive processes in silica deposition in cucumber leaves depends on transpiration rates and the balance between soil Si availability and plants’ demands for Si.

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Influence of light and mineral nitrogen forms on the activity of some enzymes in Cucumis sativus L. cotyledons

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1979.035 ◽

2015 ◽

Vol 48 (3) ◽

pp. 443-452 ◽

Cited By ~ 1

Author(s):

G. Kubik-Dobosz ◽

K. Soroka

Keyword(s):

Amino Acids ◽

Glutamine Synthetase ◽

Glutamate Dehydrogenase ◽

Cucumis Sativus ◽

Aspartate Aminotransferase ◽

Alanine Aminotransferase ◽

Glutamate Synthase ◽

Mineral Nitrogen ◽

Nitrogen Forms ◽

Cucumis Sativus L

It was demonstrated that when nitrogen was deficient in the medium, the activity of glutamine synthetase (GS), glutamate dehydrogenase (GDH), alanine aminotransferase (GPT) and aspartate aminotransferase (GOT) in etiolated cucumber cotyledons was higher than in those of seedlings growing under light. When the plants grew on nitrate or ammonium medium, light stimulated GS activity and depressed that of GDH and GOT, without changing the activity of GPT. It was found that the influence of the form of mineral nitrogen on the activity of the studied enzymes was dependent on light. On the basis of the results. obtained, the contribution of the GS glutamate synthase system and GDH to the incorporation of the taken up nitrogen into the amino acids in light and in darkness is discussed.

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