Investigations on photosynthesis and assimilate translocation in <i>Daucus carota</i> L. as influenced by a varied phosphorus supply and changes in the endogenous hormonal system following GA<sub>3</sub> treatments

Bender, L.; Stiebeling, B.; Neumann, K.–H.

doi:10.1002/jpln.19861490504

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…The results of yield dry matter and P content obtained in the present study are in good agreement with those of Bender et al (1986). The placement of phosphorus and potassium has increased the yield, phosphorus concentration in root in 1986, photosynthetic C0 2 fixation (yield, correlation between root and shoot dry weights) and assimilate translocation (dry matter content and correlation between dry matter and sucrose as well as total sugars).…”

Section: Organically Cultivated Carrotssupporting

confidence: 89%

The role of fertilization practices in the yield and quality of carrot (Daucus carota L.)

Evers¹

1989

AFSci

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The influence of different fertilization practices on the growth, yield and inner quality of carrot (Daucus carota L.) was studied. The field experiments were carried out in Southern Finland, on the experimental farm of Kemira Oy, in 1985 and 1986. Unirrigated and irrigated placement and broadcast fertilization, NPK fertirrigations without or with basic fertilization, and PK placement with N fertirrigations were compared. Placement and broadcast fertilizations were carried out by single application, whereas NPK or N fertirrigations were performed as split applications. The highest yields were obtained when the total phytomass production was high. The yield increased by the placement of NPK fertilizer as compared to broadcast fertilization, and by the placement of P and K as compared to treatments where P and K were broadcasted or fertirrigated. The PK placement with N fertirrigations increased the root dry matter content as compared to NPK fertirrigations. The lowest NO3-N contents of roots were obtained by unirrigated placement fertilization. NPK fertirrigations caused higher root NO3-N contents than any other fertilization practice, and irrigation as such increased the NO3-N contents. Root N and P contents were increased by placement of PK or NPK fertilizers, but fertilization practices had no effects on K, Mg and Ca contents. Single application increased ash and dietary fibre contents as compared to split applications. In conclusion, the placement of NPK or PK fertilizers had positive effects on the above mentioned quality criteria and yield, and thus in future research and in commercial vegetable production these fertilization practices should be utilized. Fertilization practices had no or only slight effects on the carotene and sugar contents, taste, texture and the quality of stored carrots. Carotene content increased as the growing season progressed, and was 41 % higher in the climatically more favourable year 1986 than in 1985. Total sugar contents were higher in the climatically less favourable year 1985 and in unfertilized treatments than in 1986 and in fertilized treatments. It was hypothesized that carrot sugar contents are related to growth and total phytomass production. The indicative results showed that the NPK fertirrigations without basic fertilization had a slight positive effect on carrot taste and texture as compared to placement fertilization but, on the other hand, the NPK fertirrigations without basic fertilization showed a tendency to impair the storage ability as compared to single application. In conclusion, carotene and sugar contents are strongly influenced by genotype and climate and thus it is logical that the effects of fertilization practices remained slight. The results of carrot taste do not allow any final conclusions to be drawn; further investigation on the subject is needed.

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Section: Organically Cultivated Carrotssupporting

confidence: 89%

The role of fertilization practices in the yield and quality of carrot (Daucus carota L.)

Evers¹

1989

AFSci

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“…Because P is a component of RNA and DNA, as reported by Marschner (1995), it is reasonable to assume that the availability of P will have a significant impact on the biosynthesis of a variety of substances, including carbohydrates, proteins, and hormones. Additionally, Bender et al (1986) revealed that plants with an optimal P supply have much higher levels of photosynthetic CO 2 fixation and assimilate translocation than plants with low P levels.…”

Section: Resultsmentioning

confidence: 99%

Physio-biochemical Behavior and Health Effects of Pepper Plants Subjected to Lead Stress and Their Responses to Remediating Agents as Microbial Activity and Phosphorus

Selim,

Sami

et al. 2024

horts

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This work assessed the alleviating effects of bacteria (Bacillus subtilis) and phosphorus as environmentally friendly materials on the cultivation of pepper plants in polluted soil with lead (Pb) in forms of PbSO4, and Pb(NO3)2 at rates of 0, 1000, 2000 and 3000 µg Pb/g soil. Pot experiments were conducted to study the growth parameters, some physiological factors, biochemical constituents, and yield attributes, as well as the tolerance index (TI), translocation factor (TF), bioconcentration factor (BCF), and health effects [daily intake of heavy metals (DIM), health risk index (HRI), and carcinogenic risk (CR)]. Increasing the Pb concentration of all Pb salt used in soil severely affected the plant vegetative growth parameters. In comparison with other Pb salt forms, Pb(NO3)2 salt had a strong inhibitory impact. Additionally, the photosynthetic pigments in leaves were negatively impacted by all Pb salt forms. The application of Pb in all salt forms led to changes in the leaf water deficit (LWD), osmotic pressure, and membrane integrity and decreased the total water content, relative water content (RWC), transpiration rate, and leaf succulence. Pollution with Pb salts considerably decreased the yield constituents and various chemical properties of pepper, more so in the presence of Pb nitrate than in the presence of Pb sulfate type. A comparison of the concentration of Pb presence of Pb nitrate was greatly increased than the Pb sulfate in the whole plants. The safe limit of 0.3 mg/kg was exceeded by the Pb concentration in pepper fruits (6.3 and 4.3 mg/kg) cultivated in Pb-contaminated soil [with Pb(NO3)2 and PbSO4, respectively]. Additionally, Pb sulfate had a greater detrimental effect on Pb uptake in several plant organs than other Pb salt forms. The TI of pepper plants treated with salt types was >60% with PbSO4 (75.6%), whereas it was <60% with Pb(NO3)2 (35.2%). The BCF values of pepper plants in the polluted Pb soils varied from 0.10 to 0.41, indicating a moderate accumulator plant. At every level of Pb contamination with all Pb salt types, the sequence of Pb TF values was as follows: roots (TFr) > shoots (TFsh) > fruits (TFf), with TF values < 1. When compared with TFr and TFsh, TFs for shoot to fruits (TFf) had the lowest values (range, 0.07–0.22). The DIM, HRI, and CR values of pepper plants revealed that the Pb of fruit of stressed pepper plants is within safe limits. In addition to reducing the detrimental effects of intolerable Pb levels (2000 and 3000 µg Pb/g soil) on the majority of the aforementioned characters, adding Bacillus bacteria as a bio-agent and phosphorus as a chemo-agent to Pb-polluted soils also stimulated growth, increased yield, controlled plant water relations, protected photosynthetic pigments, and sharply decreased the Pb accumulation in plant organs. The Bacillus bacteria application resulted in some superior characteristics, such as root length, leaf number, leaf length, leaf area, leaf area index, fresh biomass, dry biomass, photosynthetic pigments, quantity yield attributes, reduction Pb accumulation in all plant organs, TI, TFr, TFf, BCF, in health effects trials, whereas phosphorus application improved plant height, leaf width, RWC, LWD, osmotic pressure, total soluble solids, acidity, total carbohydrates, total protein, and TFsh.

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“…Moreover, Sobh et al, (2000) reported that, inoculation with phosphorus bio-fertilizers increased phosphatase activity, available P and producing growth regulating hormones. Moreover, Bender et al, (1986) revealed that, available P increased the photosynthetic Co2 fixation and assimilates translocation.…”

Section: Photosynthetic Pigmentsmentioning

confidence: 96%

“…Zayed (1998) proved that, phosphorus dissolving bacteria is known by its ability to dissolve the precipitation form phosphorus: Ca3 (PO4)2 depending on its ability to produce inorganic, organic acids and/or Co2. Bender et al, (1986) revealed that, phosphorus increased photosynthetic Co2 fixation and assimilates translocation in carrot plants. Rabinoveich et al, (1999) mentioned that, increased doses of bio-fertilizers for potato raised high concentration of denitrificating microorganisms.…”

Section: Carbohydrate Fractionsmentioning

confidence: 97%

Effect of Bio-and Mineral Fertilizers on Photosynthetic Activity of Potatoes.

Helaly

Fouda

Ramadan

2009

Journal of Plant Production

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Decreasing NPK doses, less than the recommended one, decreased chlorophylls a, b and their total as well as reducing sugars, non-reducing sugars and total carbohydrates, whereas carotenoieds and poly saccharides were increased during the two growing seasons. Chlorophyll a/b as well as total chlorophylls/ carotenoides ratios were also increased due to NPK stresses. Application of bio-fertilizers, over all the NPK minerals doses, improved the accumulation of all photosynthetic pigments fraction as well as reducing sugars, nonreducing sugars, total sugars and total carbohydrates whereas, decreased that of polysaccharides compared to the plants grown without bio-fertilizers inoculation. Similarly, chlorophyll a/ chlorophyll b and chlorophylls /carotenoides ratios were increased with the same manner due to the inoculation of bio fertilizers used. The application of NFB was more effective than the other strains used followed by PDB and SB when used individually or incombinations compared with plants inoculated without bio fertilizers. The interaction treatments between minerals and bio fertilizers, show that, bio fertilizers counteracted the depressing effects of decreasing NPK dose less than the recommended one on all photosynthetic pigments as well as reducing, nonreducing and total sugars as well as total carbohydrates whereas, decreased insoluble carbohydrates in the shoot system of potato plants during the two growing seasons. An additive effects were recorded in plants grown in 100% NPK and inoculated with bio-fertilizers mixture. Again, NFB strain was most effective than the other strains if inoculated individually or in combination with the others. Application of 75% NPK combined with bio fertilizers showed high values in this respect. The most effective treatment was found with NFB+PDB+SB followed by NFB+PDB and NFB+SB respectively. Generally, it seems that all bio-fertilizers used, with the superiority of NFB strain, counteracted the depressing effect of NPK decreases on photosynthetic capacity up to 75% dose. At 75% NPK dose combined with bio-fertilizers attained nearly similar results with those recorded in the control plant. On the other, biofertilizers used failed to counteracted the harmful effects of NPK at 50% dose from the recommended dose. Bio-fertilizers in the presence of NPK at 50% dose from the recommended dose attained the minimum values in this respect.

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Investigations on photosynthesis and assimilate translocation in Daucus carota L. as influenced by a varied phosphorus supply and changes in the endogenous hormonal system following GA₃ treatments

Cited by 3 publications

References 8 publications

The role of fertilization practices in the yield and quality of carrot (Daucus carota L.)

The role of fertilization practices in the yield and quality of carrot (Daucus carota L.)

Physio-biochemical Behavior and Health Effects of Pepper Plants Subjected to Lead Stress and Their Responses to Remediating Agents as Microbial Activity and Phosphorus

Effect of Bio-and Mineral Fertilizers on Photosynthetic Activity of Potatoes.

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Investigations on photosynthesis and assimilate translocation in Daucus carota L. as influenced by a varied phosphorus supply and changes in the endogenous hormonal system following GA3 treatments

Cited by 3 publications

References 8 publications

The role of fertilization practices in the yield and quality of carrot (Daucus carota L.)

The role of fertilization practices in the yield and quality of carrot (Daucus carota L.)

Physio-biochemical Behavior and Health Effects of Pepper Plants Subjected to Lead Stress and Their Responses to Remediating Agents as Microbial Activity and Phosphorus

Effect of Bio-and Mineral Fertilizers on Photosynthetic Activity of Potatoes.

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Investigations on photosynthesis and assimilate translocation in Daucus carota L. as influenced by a varied phosphorus supply and changes in the endogenous hormonal system following GA₃ treatments