Occurrence and correction of chlorosis in young petunia plants

Šrámek, F.; Dubský, M.

doi:10.17221/6/2009-hortsci

Cited by 7 publications

(6 citation statements)

References 8 publications

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“…It is in accordance with other authors (Carlile 2008;Rainbow 2009) indicating that higher concentration of available K is a limiting factor for using dSD in growing substrates. Concentration of available Zn in dSD treatments was below the range typical for substrates with composts (Šrámek, Dubský 2009b).…”

Section: Chemical and Physical Properties Of Substratesmentioning

confidence: 69%

Use of solid phase of digestate for production of growing horticultural substrates

Dubský¹,

Chaloupková²,

Kaplan³

et al. 2019

Hort. Sci. (Prague)

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Solid phase of digestate (SD) of agricultural biogas plants, containing undecomposed fibrous fractions of organic matter, is usable as a constituent of growing substrates. The content of soluble salts and available nutrients is limiting for SD addition into growing substrates. For addition of SD with initial 80% moisture its content of ammonium nitrogen and available potassium is limiting. The SD with natural moistness can be used in peat based substrates up to 10% volume. The content of ammonium nitrogen during the drying of SD with the use of waste heat from biogas plants is decreased. Optimal proportion of dry SD (dSD) in peat based substrates ranged from 20 to 40% volume. Peat based substrates with 20% volume of dSD had suitable physical and chemical (e.g. content of available potassium<br /> < 300 mg/l) properties. These dSD-peat growing substrates have been successfully tested in greenhouse experiments with pot plants (Petunia, Impatiens, and Pelargonium). The addition of dSD to peat based substrates increased air capacity and decreased easily available water content. However, the basic fertilization of the dSD-peat growing substrates is necessary to optimize the content of nutrients.

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Section: Chemical and Physical Properties Of Substratesmentioning

confidence: 69%

Use of solid phase of digestate for production of growing horticultural substrates

Dubský¹,

Chaloupková²,

Kaplan³

et al. 2019

Hort. Sci. (Prague)

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“…Manganese and iron were applied in various ratios but this had no effect on leaf Mn. In previous work, (Šrámek and Dubský 2009) regular fertilization with a solution containing 0.8 mg Mn/L and 1.4 mg Fe/L from EDTA-chelate decreased leaf Mn of petunia plants There was no effect of substrate pH on leaf content of N (34.3 ± 1.6 mg/g), P (4.3 ± 0.2 mg/g), K (24.2 ± 1.9 mg/g), and Mg (2.2 ± 0.1 mg/g). A significantly higher calcium content obtained in the W12 treatment plants (7.7 mg/g) compared to those in the W3 treatment plants (5.5 mg/g) was an exception.…”

Section: Resultsmentioning

confidence: 94%

Occurrence and correction of lime-induced chlorosis in petunia plants

Šrámek¹,

Dubský²

2011

PLANT SOIL ENVIRON

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The effect of various concentrations and ratios of iron (Fe) and manganese (Mn) chelates on growth, micronutrient uptake and chlorophyll content was investigated in a glasshouse experiment using potted petunia plants. The plants were cultivated in a peat substrate amended with dolomitic limestone at rate of 3.0 g/L (control substrate) or 12.0 g/L. The higher rate was established both to restrict the uptake of Fe, Mn and other nutrients and also to test the effectiveness of various Fe and Mn treatments. The plants in all the treatments were fertigated at weekly intervals with a nutrient solution containing macronutrients and micronutrients. Various chelate forms of Fe and Mn were used with the exception of two treatments where these two elements were omitted. The effects of different substrate pH levels (derived from different limestone contents) had a large effect on plant growth, chlorophyll content and content of Fe and Mn accumulated in the plant leaves. The plants in the high-limestone substrate devoid of Fe and Mn had reduced growth and lower chlorophyll content. They also had lower leaf Fe and Mn content than the control plants in the R3 substrate. Regular fertigation with a nutrient solution containing Mn and Fe improved plant growth rate and also increased chlorophyll content. However, its efficiency depended on the chelate form and concentration used. The effect of chelate application on the Fe and Mn leaf content was unclear as it only marginally increased leaf Fe absorption in some treatments. No effect of the various Fe/Mn ratios was observed.

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“…Moreover, the solubility of Fe under different pH levels also changes. In neutral pH media, Fe exists in the form of ferric Fe and most of the Fe 3+ -OH complexes are cross-linked into insoluble ferrihydrite polymers, therefore, the Fe ion content in the medium is extremely low [ 48 ]. The solubility of FeSO 4 is higher at lower pH (below 5.5), and the solubility of FeSO 4 decreases with the increase in the pH [ 49 ].…”

Section: Discussionmentioning

confidence: 99%

Iron Source and Medium pH Affect Nutrient Uptake and Pigment Content in Petunia hybrida ‘Madness Red’ Cultured In Vitro

Guo

Xiao

Jeong

2022

IJMS

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Deficiency or excess of iron (Fe) and improper medium pH will inhibit the growth and development of plants, reduce the transfer and utilization of energy from the root to the leaf, and affect the utilization efficiency of inorganic nutrients. The most common symptom of Fe deficiency in plants is chlorosis of the young leaves. In this study, the effects of the iron source, in combination with the medium pH, on plant growth and development, plant pigment synthesis, and nutrient uptake in a model plant Petunia hybrida cultured in vitro were investigated. Iron sulfate (FeSO4·7H2O) or iron chelated with ethylenediaminetetraacetic acid (Fe-EDTA) were supplemented to the MNS (a multipurpose nutrient solution) medium at a concentration of 2.78 mg·L−1 Fe, and the treatment without any Fe was used as the control. The pH of the agar-solidified medium was adjusted to either 4.70, 5.70, or 6.70 before autoclaving. The experiment was carried out in an environmentally controlled culture room with a temperature of 24 °C with 100 µmol·m−2·s−1 photosynthetic photon flux density (PPFD) supplied by white light emitting diodes (LEDs) during a photoperiod of 16 h a day, 18 °C for 8 h a day in the dark, and 70% relative humidity. Regardless of the Fe source including the control, the greatest number of leaves was observed at pH 4.70. However, the greatest lengths of the leaf and root were observed in the treatment with Fe-EDTA combined with pH 5.70. The contents of the chlorophyll, carotenoid, and anthocyanin decreased with increasing medium pH, and contents of these plant pigments were positively correlated with the leaf color. The highest soluble protein content and activities of APX and CAT were observed in the Fe-EDTA under pH 5.70. However, the GPX activity was the highest in the control under pH 4.70. In addition, the highest contents of ammonium (NH4+) and nitrate (NO3−) were measured in the FeSO4-4.7 and EDTA-5.7, respectively. More than that, the treatment of Fe-EDTA combined with pH 5.70 (EDTA-5.7) enhanced nutrient absorption, as proven by the highest tissue contents of P, K, Ca, Mg, Fe, and Mn. The genes’ ferric reduction oxidase 1 and 8 (PhFRO1 and PhFRO8), iron-regulated transporter 1 (PhIRT1), nitrate transporter 2.5 (PhNRT2.5), and deoxyhypusine synthase (PhDHS) were expressed at the highest levels in this treatment as well. In the treatment of EDTA-5.7, the reduction and transport of chelated iron in P. hybrida leaves were enhanced, which also affected the transport of nitrate and catalyzed chlorophyll level in leaves. In conclusion, when the medium pH was adjusted to 5.70, supplementation of chelated Fe-EDTA was more conducive to promoting the growth and development of, and absorption of mineral nutrients by, the plant and the expression of related genes in the leaves.

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Occurrence and correction of chlorosis in young petunia plants

Cited by 7 publications

References 8 publications

Use of solid phase of digestate for production of growing horticultural substrates

Use of solid phase of digestate for production of growing horticultural substrates

Occurrence and correction of lime-induced chlorosis in petunia plants

Iron Source and Medium pH Affect Nutrient Uptake and Pigment Content in Petunia hybrida ‘Madness Red’ Cultured In Vitro

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