The relationship of tissue chlorogenic acid concentrations and leaching of phenolics from sunflowers grown under varying phosphate nutrient conditions

Koeppe, D. E.; Southwick, L. M.; Bittell, J. E.

doi:10.1139/b76-060

Cited by 55 publications

(18 citation statements)

References 29 publications

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“…The authors identified phenolic-like compounds released by roots as agents affecting Fe 3+ reducing activity in the growth medium. Phenolic compounds have been reported as active P mobilizing agents in soil minerals (Koeppe et al, 1976). Our results on soil-grown tall fescue suggest that N. coenophialum-endophyte, unlikely mycorrhizal fungi in other grasses, might be involved indirectly in modifications of root functions in tall fescue grown in P-deficient soils.…”

Section: Endophyte Effects On Phosphorus Acquisition In Tall Fescuementioning

confidence: 57%

Neotyphodium coenophialum‐endophyte infection affects the ability of tall fescue to use sparingly available phosphorus

Malinowski

Belesky

1999

Journal of Plant Nutrition

113

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Neotyphodium coenophialum, (Morgan-Jones & Gams) Glenn, Bacon & Hanlin, infected tall fescue (Festuca arundinacea Schreb.) plants perform better than non-infected isolines on phosphorus (P)-deficient soils. Our objective was to characterize growth and P uptake dynamics of tall fescue in response to endophyte infection and P source at low P availability in soil. Two tall fescue genotypes (DN2 and DN4) infected with their naturally occurring N. coenophialum strains (E+), and in noninfected (E-) forms were grown in Lily soil (fine loamy siliceous, mesic Typic Hapludult) in a greenhouse for 20 weeks. Three soil P treatments were imposed: no P supplied (control) and P supplied as commercial fertilizer (PF) or as phosphate rock (PR) at the level of 25 mg P kg -1 soil. Interaction of tall fescue genotype and endophyte status had a significant influence on mineral element uptake suggesting high 1 Corresponding author. 835 836 MALINOWSKI AND BELESKY specificity of endophyte-tall fescue associations. Endophyte infection did not affect root dry matter (DM) when no P was supplied but shoot DM was reduced by 20%. More biomass was produced and greater P uptake rate occurred in PR than PF treatment. Root DM was greater in E+ DN4 than E-DN4 when supplied with either PF or PR. In contrast, endophyte infection did not affect root DM of DN2, regardless of P source. Relative growth rate (RGR) of E+ plants grown with PR was 16% greater than that of E-plants. Endophyte infection did not improve growth or P uptake in PF treatment. When PR was supplied, P uptake rate was 24% greater in E+ DN2 than E-DN2, but endophyte infection did not benefit DN4. Phosphorus-use efficiency was 6% less in E+ DN2 but 16% greater in E+ DN4 compared to E-plants, regardless of P source. Root exudates of E+ DN2, but not E+ DN4 solubilized more P from PR than those of E-plants. The correlation between root RGR and P uptake rate was relatively high for E-plants (r=0.76), but low for E+ plants (r=0.27) grown with PR. Results suggest that P uptake by E+ tall fescue might rely on mechanisms other than an increase in root biomass (surface area). Endophyte infection modified tall fescue responses to P source. This phenomenon was associated with modes of P acquisition which included enhanced activity of root exudates in releasing P from PR in E+ plants (DN2), and increased root biomass (DN4). The dominant means of P acquisition may be determined by a specific association of endophyte and tall fescue genomes. Endophyte-tall fescue association plasticity contributes to widespread success of symbiotic in marginal resource conditions.

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Section: Endophyte Effects On Phosphorus Acquisition In Tall Fescuementioning

confidence: 57%

Neotyphodium coenophialum‐endophyte infection affects the ability of tall fescue to use sparingly available phosphorus

Malinowski

Belesky

1999

Journal of Plant Nutrition

113

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“…However, the ability of a wide range of abiotic stress factors to stimulate phenylpropanoid biosynthesis is less widely appreciated. These abiotic factors include high light (Mole et al 1988;Beggs & Wellman 1994), low temperatures (Christie et al 1994;Solecka et al 1999), sugars (Tsukaya et al 1991;Sadka et al 1994) and phosphate de¢ciency (Koeppe et al 1976;Trull et al 1997;Yamamoto et al 1998). Although the signal transduction pathway that triggers this common biosynthetic response to diverse environmental factors is not fully understood, cellular bioenergetics are thought to play a crucial role in regulating key elements of the pathway (Ehness et al 1997).…”

Section: Bioenergetics Of Phenolic Metabolism In Stress Responsesmentioning

confidence: 99%

Energy dissipation and radical scavenging by the plant phenylpropanoid pathway

Grace

Logan

2000

Phil. Trans. R. Soc. Lond. B

394

225

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Environmental stresses such as high light, low temperatures, pathogen infection and nutrient de¢ciency can lead to increased production of free radicals and other oxidative species in plants. A growing body of evidence suggests that plants respond to these biotic and abiotic stress factors by increasing their capacity to scavenge reactive oxygen species. E¡orts to understand this acclimatory process have focused on the components of the`classical' antioxidant system, i.e. superoxide dismutase, ascorbate peroxidase, catalase, monodehydroascorbate reductase, glutathione reductase and the low molecular weight antioxidants ascorbate and glutathione. However, relatively few studies have explored the role of secondary metabolic pathways in plant response to oxidative stress. A case in point is the phenylpropanoid pathway, which is responsible for the synthesis of a diverse array of phenolic metabolites such as £avonoids, tannins, hydroxycinnamate esters and the structural polymer lignin. These compounds are often induced by stress and serve speci¢c roles in plant protection, i.e. pathogen defence, ultraviolet screening, antiherbivory, or structural components of the cell wall. This review will highlight a novel antioxidant function for the taxonomically widespread phenylpropanoid metabolite chlorogenic acid (CGA; 5-O-ca¡eoylquinic acid) and assess its possible role in abiotic stress tolerance. The relationship between CGA biosynthesis and photosynthetic carbon metabolism will also be discussed. Based on the properties of this model phenolic metabolite, we propose that under stress conditions phenylpropanoid biosynthesis may represent an alternative pathway for photochemical energy dissipation that has the added bene¢t of enhancing the antioxidant capacity of the cell.

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“…It has been also reported that large amounts of allelochemical compounds were leached from the living intact roots, dried roots, and tops of phosphate deficient plants than from phosphate sufficient ones. [75] Phosphorus deficiency is one of the most important yield limiting nutrient for upland rice in Brazilian Oxisol. [76] Hence, P deficiency may aggravate allelopathy problem in upland rice grown on Brazilian Oxisols.…”

Section: Planting Allelochemical Resistant Cultivarsmentioning

confidence: 99%

Upland Rice and Allelopathy

Fageria

Baligar

2003

Communications in Soil Science and Plant Analysis

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Upland rice (Oryza sativa L.) is mainly grown in Asia, Africa and Latin America. Yield potential of upland rice is quite low and invariably this crop is subjected to many environmental stresses. Further, when upland rice is grown in monoculture for more than two to three years on the same land, allelopathy or autotoxicity is frequently reported. Allelopathy involves complex plant and plant chemical interactions. The level of phytotoxicity of allelochemicals is influenced by abiotic and biotic soil factors. Adopting suitable management strategies in crop rotation can reduce or eliminate allelochemicals phytotoxicity. Rice yields can be improved by growing rice in rotation with other crop species. Allelochemicals of rice can be used for control of weeds in this crop as well as other crops that are grown in rotation with rice. This review highlights that present knowledge of allelopathy in upland rice is inadequate and fragmentary, and therefore, more controlled Vol. 34, Nos. 9 & 10, pp. 1311-1329, 2003 This article is a U.S. government work, and is not subject to copyright in the United States. COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSISand field studies are needed to understand and to reduce the detrimental effects of allelopathy in the upland rice production.

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The relationship of tissue chlorogenic acid concentrations and leaching of phenolics from sunflowers grown under varying phosphate nutrient conditions

Cited by 55 publications

References 29 publications

Neotyphodium coenophialum‐endophyte infection affects the ability of tall fescue to use sparingly available phosphorus

Neotyphodium coenophialum‐endophyte infection affects the ability of tall fescue to use sparingly available phosphorus

Energy dissipation and radical scavenging by the plant phenylpropanoid pathway

Upland Rice and Allelopathy

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