Identification of aliphatic and aromatic acids in root and seed exudates of peas, cotton, and barley

Kovacs, Martin F

doi:10.1007/bf01372797

Cited by 28 publications

(8 citation statements)

References 17 publications

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“…223 Addition of barley, oat, and wheat straw mulches on black spruce seedlings in greenhouse had no significant effect on the content of N, Ca, Mg, and Fe and seedling height, but reduced the contents of P, K, and Mn. 22s These results, along with many others, 32 indicate the accumulation of phytotoxic compounds that have been identified in cereal residues and cereal mulched soils. Under field conditions, however, cereal mulches improved spruce growth and foliar N content when compared with control plants.…”

Section: B Physiological and Nutritional Effectsmentioning

confidence: 57%

“…Phytoalexins are toxic to rhizobia, but isoflavonoids released in the rhizosphere can induce glyceollin resistance of Bradyrhizobium. 32 ' 1 Nodule secondary metabolites may also act in a regulatory fashion in nodule functioning. PAL, Omethyltransferase, total phenolics, and total indoles are higher in nodules than in roots.…”

Section: Effects Of Phenolics On Nodulation and Nod Gene Inductionmentioning

confidence: 99%

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Significance of phenolic compounds in plant‐soil‐microbial systems

Siqueira¹,

Nair²,

Hammerschmidt³

et al. 1991

Critical Reviews in Plant Sciences

269

139

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Numerous reports have been published on the occurrence, isolation, and characterization of phenolic compounds in plant-soil systems. The low molecular weight phenolics are of great interest because of their effects as allelopathic compounds and plant growth regulators, and they have traditionally been considered as defense molecules in plant-pathogen interactions. More recently, their role as signal molecules in plantmicrobe systems has become evident. Specific molecules can act either as inducers for virulent genes in plantpathogen systems, such as Agrobacterium, or as inducers and "repressors" in Rhizobium-legumc and probably other symbiosis. The overall regulation role of these compounds in compatible and incompatible host-microbe interactions is discussed in this review.

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Section: B Physiological and Nutritional Effectsmentioning

confidence: 57%

Section: Effects Of Phenolics On Nodulation and Nod Gene Inductionmentioning

confidence: 99%

Significance of phenolic compounds in plant‐soil‐microbial systems

Siqueira¹,

Nair²,

Hammerschmidt³

et al. 1991

Critical Reviews in Plant Sciences

269

139

View full text Add to dashboard Cite

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“…Kovacs [25] concluded that a number of aliphatic (malic, lactic, citric, glycolic and succinic) and aromatic acids (p-hydroxybenzoic, protocatechuric, vanillic and salicylic) are exuded by germinating barley seeds. In this study, the presence of seed exudates in the wastewater during the germination period was evaluated using total solids, chemical oxygen demand, nitrogen and phosphorus analyses.…”

Section: Resultsmentioning

confidence: 99%

Use of Barley for the Purification of Aquaculture Wastewater in a Hydroponics System

Snow¹,

Ghaly²

2008

American J. of Environmental Sciences

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Barley was examined for its ability to remove nutrients from aquaculture wastewater. The effects of seed sterilization using ethanol and bleach and seed density on germination and plant growth were investigated. Surface sterilization of barley seeds had a negative impact on germination. Increasing the ethanol concentration and/or the bleach concentration reduced the germination percentage. Barley seeds were first germinated in water in the hydroponics system. The seedlings then received wastewater from an aquaculture system stocked with Arctic charr. During the experiment, the crops grew rapidly and fairly uniformly and showed no signs of mineral deficiency or disease. The average crop height at harvest was 25.5 cm and the yield varied from 25 to 59 t ha 1 , depending on the seed density. The hydroponically grown barley was able to significantly reduce the pollution load of the aquaculture wastewater. The TS, COD, NH 4 + -N, NO 2 --N, NO 3 --N, and PO 4 3--P reductions ranged from 52.7 to 60.5%, from 72.9 to 83.1%, from 76.0 to 76.0%, from 97.6 to 99.2%, from 76.9 to 81.6% and from 87.1 to 95.1%, respectively. However, the effluent produced from the hydroponics system had slightly higher levels of TS (420-485 mg L 1 ) than the 480 mg L 1 recommended for aquatic animals. A sedimentation/filtration unit should be added to the hydroponics system.

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“…Cartwright and Smith (1967), considering possible modes for the demethylatioii of vanillate, 3-methoxybenzoate, and 3,4-dimethoxybenzoate, suggested that the initial reaction was oxidative and involved the release of formaldehyde and the conversion of the methoxyl group into a hydroxyl group. Aromatic acids with a methoxyl group are common in the coat of various seeds (Griffits 1958;Sumere et al 1958 ;Pollock 1960) and in seed and root exudates (VanCura 1964;Kovacs 1971). Arkadha (1963) found formic acid and other volatile acids in root exudates of young seedlings of corn and buckwheat.…”

Section: Discussionmentioning

confidence: 96%

Gaseous and volatile exudates from germinating seeds and seedlings

Vančura¹,

Stotzky²

1976

Can. J. Bot.

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V A N~U R A . V . . and G. STOTZKY. 1976. Gaseous and volatile exudatesfromgerminatingseeds and seedlings. Can. J. Bot. 54: 518-532. The quantitiesof gaseous and volatile metabolites liberated by germinating seeds and seedlings appeared to be related, ingeneral, to the amount of storage substances present in the seeds. Both qual~tative and quantitative differences were found between various plant species and varieties of both angiosperms and gymnosperms. The release of volatile compounds preceded the appearance of the first root and, with most seeds, was greatest in the first 24 to 48 h. Organic volatiles could be detected, by gas chromatography. in as little as 5% of the atmosphere from one germinating seed. All seeds that were studied liberated ethanol, and most seeds evolved methanol. formaldehyde, acetaldehyde, formic acid, ethylene. and propylene. Propionaldehyde and (or) acetone was also evolved by cotton, pea. and yellow pine. The possible source of these volatile metabolites and their ecological implications are discussed. V A N~U R A .V . . et G. STOTZKY. 1976. G a s e o~~s and volatile exudates from germinating seeds and seedlings. Can. J . Bot. 54: 518-532. La quantite de metabolites gazeux et volatiles IibCrCs par les graines en germination et les plant~lles semble reliee. en general, a la quantite de substances d'entreposage presentes dans les gl-aines. Des differences q~lalitatives et quantitatives ont ete trouvies entre diverses especes et varietes de plantes, aussi bien chez desangiospermes que chezdesgymnospermes. La liberation de composes volatiles precede I'apparition de la premiere racine et. chez la plupart des gl-aines, est plus intense au cours des premieres 24 a 48 h. A I'aide de la chromatographie en phase gazeuse. des composes volatiles organiques ont pu ktre deceles dans aussi peu que 5% d e

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Identification of aliphatic and aromatic acids in root and seed exudates of peas, cotton, and barley

Cited by 28 publications

References 17 publications

Significance of phenolic compounds in plant‐soil‐microbial systems

Significance of phenolic compounds in plant‐soil‐microbial systems

Use of Barley for the Purification of Aquaculture Wastewater in a Hydroponics System

Gaseous and volatile exudates from germinating seeds and seedlings

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