Evidence for inhibitory allelopathic interactions involving phenolic acids in field soils: Concepts vs. an experimental model

Critical Reviews in Plant Sciences

Volumn 18, Issue 5, 1999, Pages 673-693

  Blum, Udo ^a   Shafer, Steven R ^b   Lehman, Mary E ^c  

^a NORTH CAROLINA STATE UNIVERSITY   (United States)

^b U S DEPARTMENT OF AGRICULTURE   (United States)

^c LONGWOOD UNIVERSITY   (United States)

Author keywords

Allelopathic interactions; Microbial utilization; Phenolic acids; Plant microbe soil systems; Rhizosphere; Root uptake; Sorption

Indexed keywords

EID: 0032884276     PISSN: 07352689     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0735-2689(99)00396-2     Document Type: Article

References (136)

1. Abdul-Rahman, A. A. and Habig, S. A. 1989. Allelopathic effects of alfalfa (Medicago sativa) on bladygrass (Imperata cylindrica). J. Chem. Ecol. 15: 2289-2300.
2. An, M., Johnson, I. R., and Lovett, J. V. 1993. Mathematical modeling of allelopathy: biological responses to allelochemicals and its interpretation. J. Chem. Ecol. 19: 2379-2388.
3. An, M., Johnson, I. R., and Lovett, J. V. 1996. Mathematical modeling of allelopathy. I. Phytotoxicity caused by plant residues during decomposition. Allelopathy J. 3: 33-41.
4. Armstrong, G. M., Rohrbaugh, L. M., Rice, E. L., and Wender, S. H. 1970. The effect of nitrogen deficiency on concentration of caffeoylquinic acids and scopolin in tobacco. Phytochemistry 9: 945-948.
5. Armstrong, G. M., Rohrbaugh, L. M., Rice, E. L., and Wender, S. H. 1971. Preliminary studies on the effect of deficiency in potassium or magnesium on concentration of chlorogenic acid and scopolin in tobacco. Proc. Okla. Acad. Sci. 51: 41-43.
6. Balke, N. E., Davis, M. P., and Lee, C. C. 1987. Conjugation of allelochemicals by plants. In: Allelochemicals: Role in Agriculture and Forestry. Waller, G. R., Ed., American Chemical Society, Washington, D.C. ACS Symposium Series 330, 214-227.
7. Bates-Smith, E. C. 1956. The commoner phenolic constituents of plants and their systematic distribution. Proc. R. Dublin Sci. Soc. 27: 165-176.
8. Bergmark, C. L., Jackson, W. A., Volk, R. J., and Blum, U. 1992. Differential inhibition by ferulic acid of nitrate and ammonium uptake in Zea mays L. Plant Physiol. 98:639-645.
9. Blum, U. 1995. The value of model plant-microbe-soil systems for understanding processes associated with allelopathic interactions: one example. In: Allelopathy: Organisms, Processes, and Applications. Inderjit, Dakshini, K. M.M. and Einhellig, F. A., Eds., American Chemical Society, Washington, D.C. ACS Symposium Series No. 582, 127-131.
10. Blum, U. 1996. Allelopathic interactions involving phenolic acids. J. Nematol. 28: 259-267.
11. Blum, U. 1997. Benefits of citrate over EDTA for extracting phenolic acids from soils and plant debris. J. Chem. Ecol. 23: 347-362.
12. Blum, U. 1998. Effects of microbial utilization of phenolic acids and their phenolic acid breakdown products on allelopathic interactions. J. Chem. Ecol. 24: 685-708.
13. Blum, U., Austin, M. F., and Shafer, S. R. 1998. The Fate and effects of phenolic acids in a plant-microbial-soil model system. In: Recent Advances on Allelopathy. Vol I. A Science for the Future. Macías, F. A., Galindo, J. C. G., Molinillo, J. M. G., and Cutler, H. G., Eds., Cadiz University Press, Spain, 159-166.
14. Blum, U., Dalton, B. R., and Rawlings, J. O. 1984. Effects of ferulic acid and some of its microbial metabolic products on radicle growth of cucumber. J. Chem. Ecol. 10: 1169-1191.
15. Blum, U. and Dalton, B. R. 1985. Effects of ferulic acid, an allelopathic compound, on leaf expansion of cucumber seedlings grown in nutrient culture. J. Chem. Ecol. 11: 279-301.
16. Blum, U., Dalton, B. R., and Shann, J. R. 1985a. Effects of ferulic and p-coumaric acids in nutrient culture on cucumber leaf expansion as influenced by pH. J. Chem. Ecol. 11: 1567-1582.
17. Blum, U., Dalton, B. R., and Shann, J. R. 1985b. Effects of various mixtures of ferulic acid and some of its microbial metabolic products on cucumber leaf expansion and dry matter in nutrient culture. J. Chem. Ecol. 11: 619-641.
18. 1 soil materials. J. Chem. Ecol. 15: 2413-2423.
19. Blum, U., Gerig, T. M., Worsham, A. D., and King, L. D. 1993. Modification of allelopathic effects of p-coumaric acid on morning-glory seedling biomass by glucose, methionine, and nitrate. J. Chem. Ecol. 19: 2791-2811.
20. Blum, U. and Rebbeck, J. 1989. The inhibition and recovery of cucumber roots given multiple treatments of ferulic acid in nutrient culture. J. Chem. Ecol. 15: 917-928.
21. Blum, U. and Shafer, S. R. 1988. Microbial populations and phenolic acids in soil. Soil Biol. Biochem. 20: 793-800.
22. Blum, U., Weed, S. B., and Dalton, B. R. 1987. Influence of various soil factors on the effects of ferulic acid on leaf expansion of cucumber seedlings. Plant Soil 98: 111-130.
23. Blum, U., Wentworth, T. R., Klein, K., Worsham, A. D., King, L. D., Gerig, T. M., and Lyu, S. W. 1991. Phenolic acid content of soils from wheat-no till, wheat-conventional till, and fallow-conventional till soybean cropping systems. J. Chem. Ecol. 17: 1045-1068.
24. Blum, U., Worsham, A. D., King, L. D., and Gerig, T. M. 1994. Use of water and EDTA extractions to estimate available (free and reversibly bound) phenolic acids in Cecil soils. J. Chem. Ecol. 20: 341-359.
25. Bonner, J. and Galston, A. W. 1944. Toxic substances from the culture media of guayule which may inhibit growth. Bot. Gaz. 106: 185-198.
26. Booker, F. L., Blum, U. and Fiscus, E. L. 1992. Short-term effects of ferulic acid on ion uptake and water relations in cucumber seedlings. J. Exp. Bot. 43: 649-655.
27. Börner, H. 1963a. Untersuchungen über die Bildung antiphytotischer und antimikrobieller Substanzen durch Mikroorganismen im Boden und ihre mögliche Bedeutung für die Bodenmüdigkeit beim Apfel (Pirus malus L.). I. Bildung von Patulin und einer phenolischen Verbindung durch Penicillium expansum auf Wurzel-und Blattrückstanden des Apfels. Phytopathol. Z. 48: 370-396.
28. Börner, H. 1963b. II. Der Einflutz verscheidener Factoren auf die Bildung von Patulin und einer phenolischen Verbindund durch Penicillium expansum auf Blatt-und Wurzebrückstanden des Apfels. Phytopathol. Z. 49: 1-28.
29. Boufalis, A. and Pellissier, F. 1994. Allelopathic effects of phenolic mixtures on respiration of two spruce mycorrhizal fungi. J. Chem. Ecol. 20: 2283-2289.
30. Boufalis, A., Pellissier, F., and Trosset, L. 1994. Responses of mycorrhizal fungi to allelopathy: Cenococcum geophilum and Laccaria laccata growth with phenolic acids. Acta Bot. Gallica 141: 547-550.
31. Cheng, H. H. 1992. A conceptual framework for assessing allelochemicals in the soil environment. In: Allelopathy: Basic and Applied Aspects. Rizvi, S. J. H. and Rizvi, V., Eds., Chapman and Hall, London, 21-29.
32. Cheng, H. H. 1995. Characterization of the mechanisms of allelopathy: modeling and experimental approaches. In: Allelopathy: Organisms, Processes, and Applications. Inderjit, Dakshini, K. M.M. and Einhellig, F. A., Eds., American Chemical Society, Washington, D.C. ACS Symposium Series No. 582, 132-141.
33. Chiou, C. T. 1989. Theoretical considerations of the partition uptake of nonionic organic compounds by soil organic matter. In: Reactions and Movements of Organic Chemicals in Soils. Sawhney, B. L. and Brown, K., Eds., Soil Science Society of America, Madison, Wisconsin. SSSA Special Publication 22, 1-29.
34. Chou, C. H. and Patrick, Z. A. 1976. Identification and phytotoxic activity of compounds produced during decomposition of corn and rye residues in soil. J. Chem. Ecol. 2: 369-387.
35. Connors, K. A. and Lipari, J. M. 1976. Effects of cycloamyloses on apparent dissociation constants of carboxylic acids and phenols: equilibrium analytical selectivity induced by complex formation. J. Pharmaceut. Sci. 65: 379-383.
36. Curl, E. A. and Truelove, B. 1986. Therhizosphere. Springer-Verlag, New York.
37. Dagley, S. 1971. Catabolism of aromatic compounds by microorganisms. In: Advances in Microbial Physiology. Vol. 6. Rose, A. H. and Wilkinson, Eds., Academic Press, London, 1-46.
38. Dalton, B. R., Blum, U., and Weed, S. B. 1983. Allelopathic substances in ecosystems: effectiveness of sterile soil components in altering recovery of ferulic acid. J. Chem. Ecol. 9: 1185-1201.
39. Dalton, B. R., Weed, S. B., and Blum, U. 1987. Plant phenolic acids in soils: a comparison of extraction procedures. Soil Sci. Soc. Am. J. 51: 1515-1521.
40. Dao, T. H. 1987. Sorption and mineralization of phenolic acids in soil. In: Allelochemicals: Role in Agriculture and Forestry. Waller, G. R., Ed., American Chemical Society, Washington, D.C. ACS Symposium Series No. 330, 358-370.
41. del Moral, R. 1972. On the variability of chlorogenic acid concentration. Oecologia 9: 289-300.
42. del Moral, R. and Muller, C. H. 1969. Fog drip: a mechanism of toxin transport from Eucalyptus globulus. Bull. Torrey Bot. Club. 96:467-475.
43. del Moral, R. and Muller, C. H. 1970. The allelopathic effects of Eucalyptus camaldulensis. Am. Midl. Nat. 83: 254-282.
44. Duke, S. O., Williams, R. D., and Markhart, A. H. 1983. Interaction of moisture stress and three phenolic compounds on lettuce seed germination. Ann. Bot. 52: 923-926.
45. Einhellig, F. A. 1986. Mechanisms and modes of action of allelochemicals. In: The Science of Allelopathy. Putnam, A. R. and Tang, C-S., Eds., John Wiley and Sons, New York, 171-188.
46. Einhellig, F. A. 1987. Interactions among allelochemicals and other stress factors of the plant environment. In: Allelochemicals: Role in Agriculture and Forestry. Waller, G. R., Ed., American Chemical Society, Washington, D.C. ACS Symposium Series No. 330, 343-351.
47. Einhellig, F. A. and Eckrich, P. C. 1984. Interaction of temperature and ferulic acid stress on grain sorghum and soybeans. J. Chem. Ecol. 10: 161-170.
48. Einhellig, F. A. and Rasmussen, J. A. 1979. Effects of three phenolic acids on chlorophyll content and growth of soybean and grain sorghum seedlings. J. Chem. Ecol. 5: 815-823.
49. 2 exchange rates, and concentrations of scopoletin, scopolin, and chlorogenic acid in tobacco, sunflower, and pigweed. Bull. Torrey Bot. Club 97: 22-33.
50. Elliot, L. F. and Cheng, H. H. 1987. Assessment of allelopathy among microbes and plants. In: Allelochemicals: Role in Agriculture and Forestry. Waller, G. R., Ed., American Chemical Society, Washington, D.C. ACS Symposium Series No. 330, 505-514.
51. Evans, W. C. 1963. The microbial degradation of aromatic compounds. J. Gen. Microbiol. 32: 177-185.
52. Faber, B. A., Zasoski, R. J., Munns, D. N., and Shackel, K. 1991. A method for measuring hyphal nutrient and water uptake in mycorrhizal plants. Can. J. Bot. 69: 87-94.
53. Fisher, R. F. 1979. Allelopathy. In: Plant Disease: An Advanced Treatise Vol. IV. How Pathogens Induce Disease. Horsefall, J. G. and Cowling, E. B. Eds., Academic Press, New York, 313-330.
54. Flaig, W. 1964. Effects of microorganisms in the transformation of lignin to humic substances. Geochim. Cosmochim. Acta 28: 1523-1435.
55. Flint, L. J., Blum, U., and Shafer, S. R. 1997. Utilization of two allelopathic phenolic acids as carbon sources by soilborne bacteria. In: Book of Abstracts. The Sixth Annual NC State University Undergraduate Research Symposium. NC State University, Raleigh, North Carolina, 66.
56. Gallet, C. and Lebreton, P. 1995. Evolution of phenolic patterns in plants and associated litter and humus of mountain forest ecosystems. Soil Biol. Biochem. 27: 157-165.
57. 1 soil materials. J. Chem. Ecol. 17: 29-40.
58. Glass, A. D. M. 1975. Inhibition of phosphate uptake in barley roots by hydroxy-benzoic acids. Phytochemistry 14: 2117-2130.
59. Glass, A. D. M. 1976. The allelopathic potential of phenolic acids associated with the rhizosphere of Pteridium aquilinum. Can J. Bot. 54: 2440-2444.
60. Greenland, D. J. 1965. Interactions between clays and organic compounds in soils. I. Mechanisms of interactions between clays and defined organic compounds. Soil Fertil. 28: 415-425.
61. Greenland, D. J. 1971. Interactions between humic and fulvic acids and clays. Soil Sci. 111: 34-41.
62. Goodwin, T. W. and Mercer, E. I. 1983. Introduction to Plant Biochemistry. 2nd. ed. Pergaman Press, Oxford.
63. Guenzi, W. D. and McCalla, T. M. 1966. Phytotoxic substances extracted from soil. Soil Sci. Soc. Am. Proc. 30:214-216.
64. 14C-labeled coumaryl alcohols: free and linked into dehydropolymer and plant lignins and model humic acids. Soil Sci. Am. J. 41: 556-562.
65. Hall, A. B., Blum, U., and Fites, R. C. 1982. Stress modification of allelopathy of Helianthus annuus L. debris on seed germination. Am. J. Bot. 69: 776-783.
66. Hall, A. B., Blum, U., and Fites, R. C. 1983. Stress modification of Helianthus annuus L. debris on seedling biomass production of Amaranthus retroflexus L. J. Chem. Ecol. 9: 1213-1222.
67. Harborne, J. B. 1982. Introduction to Ecological Biochemistry. Academic Press, London.
68. Harborne, J. B. 1990. Plant phenolics. In: Secondary Plant Products. Bell, E. A. and Charlwood, B. V., Eds., Springer-Verlag, Berlin, 331-401.
69. + absorption in oat roots by salicylic acid. Plant Physiol. 68: 1349-1553.
70. Harder, W. and Dijkhuizen, L. 1982. Strategies of mixed substrate utilization in microorganisms. Phil. Trans. R. Soc. London 297: 459-480.
71. Harper, J. L. 1975. New Biological Books: Allelopathy by E. L. Rice. Quart. Rev. Biol. 50: 493-495.
72. Harper, J. L. 1977. Population Biology of Plants. Academic Press, London, 369-381.
73. Hasset, J. J. and Banwart, W. L. 1989. The sorption of nonpolar organics by soils and sediments. In: Reactions and Movements of Organic Chemicals in Soils. Sawhney, B. L. and K., Brown, K. Eds., Soil Science Society of America, Madison, Wisconsin. SSSA Special Publication 22, 31-44.
74. Hartley, R. D. and Whitehead, D. C. 1985. Phenolic acids in soils and their influence on plant growth and soil microbial processes. In: Soil Organic Matter and Biological Activity, Developments in Plants and Soil Sciences, Vol 16. Vaughan, D. and Malcolm, R. E., Eds., Martinus Nijhoff. Dr. W. Junk Publishers, Dordtrech, Netherlands, 109-150.
75. Holappa, L. D. and Blum, U. 1991. Effects of exogenously applied ferulic acid, a potential allelopathic compound, on leaf growth, water utilization, and endogenous abscisic acid levels of tomato, cucumber and bean. J. Chem. Ecol. 17: 865-886.
76. Kenttamaa, J., Raisanen, S., Auterinen, L., and Lindberg, J. J. 1970. Ionization constants of coniferyl alcohol and related phenols. Suomen Kemistilehti B43: 333-336.
77. Klein, K. and Blum, U. 1990a. Inhibition of cucumber leaf expansion by ferulic acid in split-root experiments. J. Chem. Ecol. 16: 455-463.
78. Klein, K. and Blum, U. 1990b. Effects of soil nitrogen level on ferulic acid inhibition of cucumber leaf expansion. J. Chem. Ecol. 16: 1371-1383.
79. Koeppe, D. E., Rohrbaugh, L. M., Rice, E. L., and Wender, S. H. 1970. The effects of age and chilling temperatures on the concentration of scopolin and caffeoylquinic acids in tobacco. Physiol. Plantarum 23: 258-266.
80. Koide, R. T. 1993. Physiology of the mycorrhizal plant. In: Advances in Plant Physiology, Vol. 9, Mycorrhiza Synthesis. Tommerup, I. C. Ed., Academic Press, New York, 33-54.
81. Kuiters, A. T. 1990. Role of phenolic substances from decomposing forest litter in plant-soil interactions. Acta Bot. Neerl. 39: 329-348.
82. Kuiters, A. T. and Mulder, W. 1993. Water-soluble organic matter in forest soils. Plant Soil 152: 215-224.
83. Kuiters, A. T. and Sarink, H. M. 1986. Leaching of phenolic compounds from leaf and needle litter of several deciduous and coniferous trees. Soil Biol. Biochem. 18: 475-480.
84. Lehman, M., Blum, U., and Gerig, T. M. 1994. Simultaneous effects of ferulic and p-coumaric acids on cucumber leaf expansion in split-root experiments. J. Chem. Ecol. 20: 1773-1782.
85. Leo, A. J., Hansch, C., and Elkins, D. 1971. Partition coefficients and their uses. Chem. Rev. 71: 525-616.
86. Liebl, R. A. and Worsham, A. D. 1983. Inhibition of pitted morningglory (Ipomoea lacunosa L.) and certain other weed species by phytotoxic components of wheat (Triticum aestivum L.) straw. J. Chem. Ecol. 9: 1027-1043.
87. Linder, P. J., Craig, J. C., Jr., Cooper, F. E., and Mitchell, J. W. 1958. Movement of 2,3,6-trichlorobenzoic acid from one plant to another through their root system. J. Agric. Food Chem. 6: 356-357.
88. Lott, H. V. 1960. Über den Einfluss der kurzwelligen Strahlung auf die Biosynthese der pflanzlichen Polyphenole. Planta 55: 480-495.
89. Lyu, S-W. and Blum, U. 1990. Effects of ferulic acid, an allelopathic compound, on net P, K, and water uptake by cucumber seedlings in a split root system. J. Chem. Ecol. 16: 2429-2439.
90. Lyu, S. W., Blum, U., Gerig, T. M., and O'Brien, T. E. 1990. Effects of mixtures of phenolic acids on phosphorus uptake by cucumber seedlings. J. Chem. Ecol. 16: 2559-2567.
91. Makino, T., Takahashi, T., Sakurai, Y., and Nanzyo, M. 1996. Influence of soil chemical properties on adsorption and oxidation of phenolic acids in soil suspension. Soil Sci. Plant Nutri. 42: 867-879.
92. Martin, J. P., Haider, K., and Wolf, D. 1972. Synthesis of phenolic polymers by Hendersonula toruloidea in relation to humic acid formation. Soil Sci. Am. Proc. 36: 311-315.
93. Martin, J. P. and Haider, K. 1976. Decomposition of specifically carbon-14-labeled ferulic acid: free and linked into model humic acid-type polymers. Soil Sci. Am. J. 40: 377-380.
94. Matthias, C. R., Scow, K. M., Klironomos, J. N., and Allen, M. F. 1997. Microbial carbon-substrate utilization in the rhizosphere of Gutierrezia sarothrae grown in elevated atmospheric carbon dioxide. Soil Biol. Biochem. 29: 1387-1394.
95. McClaugherty, C. A. 1983. Soluble polyphenols and carbohydrates in through-fall and leaf litter decomposition. Acta Oecologica Generalis 4: 375-385.
96. McCully, M. E. 1995. How do real roots work? Some new views of root structure. Plant Physiol. 109: 1-6.
97. Moody, S. F., Clarke, A. E. and Bacic, A. 1988. Structural analysis of secreted slime from wheat and cowpea roots. Phytochemistry 27: 2857-2861.
98. Nordstrom, C. G. and Linberg, J. J. 1965. Thermodynamic ionization constants of phenolic carboxylic acids related to cinnamic acid and lignin. Suomen Kemistilehti 38: 291-295.
99. Papanastasiou, A. C. 1982. Kinetics of biodegration of 2,4-dichlorophenoxyacetate in the presence of glucose. Biotechnol. Bioeng. 24: 2001-2011.
100. Patrick, Z. A. 1955. The peach replant problem in Ontario. II. Toxic substances from microbial decomposition products of peach root residues. Can. J. Bot. 33: 461-486.
101. Patrick, Z. A., Toussoun, T. A., and Snyder, W. C. 1963. Phytotoxic substances in arable soils associated with decomposition of plant residues. Phytopathology 53: 152-161.
102. Patterson, D. T. 1981. Effects of allelopathic chemicals on growth and physiological responses to soybean (Glycine max). Weed Sci. 29: 53-58.
103. Pfleger, F. L. and Linderman, R. G. 1994. Mycorrhizae and Plant Health. APS Press, St. Paul, Minnesota.
104. Pue, K. J., Blum, U. Gerig, T. M., and Shafer, S. R. 1995. Mechanisms by which noninhibitory concentrations of glucose increase inhibitory activity of p-coumaric acid on morning-glory seedling biomass accumulation. J. Chem. Ecol. 21: 833-847.
105. Rice, E. L. 1984. Allelopathy. Academic Press, New York.
106. Rice, E. L. 1995. Biological Control of Weeds and Plant Diseases. Advances in Applied Allelopathy. Univ. Oklahoma Press, Norman.
107. Rovira, A. D. 1969. Plant root exudates. Bot. Review 35: 35-57.
108. Russell, E. J. and Russell, E. W. 1950. Soil Conditions and Plant Growth. John Wiley & Sons, New York.
109. Shafer, S. R. and Blum, U. 1991. Influence of phenolic acids on microbial populations in the rhizosphere of cucumber. J. Chem. Ecol. 17: 369-389.
110. Shann, J. R. and Blum, U. 1987a. The uptake of ferulic and p-hydroxybenzoic acids by Cucumis sativus. Phytochemistry 26: 2959-2964.
111. Shann, J. R. and Blum, U. 1987b. The utilization of exogenously supplied ferulic acid in lignin biosynthesis. Phytochemistry 26: 2977-2982.
112. Sieverding, E. 1986. Influence of soil water regimes on VA mycorrhiza. IV. Effect of root growth and water relations of Sorghum bicolor. J. Agron. Crop Sci. 157: 36-42.
113. Siqueira, J. O., Nair, M. G., Hammerschmidt, R., and Safir, G. R. 1991. Significance of phenolic compounds in plant-soil-microbial systems. Crit. Rev. Plant Sci. 10: 63-121.
114. Smith, W. H. 1976. Character and significance of forest tree root exudates. Ecology 57: 324-331.
115. Smith, S. E. and Read, D. J. 1997. Mycorrhizal Symbiosis, 2nd ed., Academic Press, San Diego.
116. Stowe, L. G. and Osborn, A. 1980. The influence of nitrogen and phosphorus levels on the phytotoxicity of phenolic compounds. Can. J. Bot. 58: 1149-1153.
117. Tang, C.-S. 1986. Continuous trapping techniques for the study of allelochemicals from higher plants. In: The Science of Allelopathy. Putnam, A. R. and Tang, C.-T., Eds., Wiley-Interscience, New York, 113-131.
118. Tang, C.-S. and Young, C. C. 1982. Collection and identification of allelopathic compounds from the undisturbed root system of Bigalta Limpograss (Hermarthria altissima). Plant Physiol. 69: 155-160.
119. Thijs, H. and Shann, J. R. 1994. The effects of phytotoxins on competitive outcome in model systems. Ecology 75: 1959-1964.
120. Tukey, H. B. 1966. Leaching of metabolites from aboveground plant parts and its implications. Bull. Torrey Bot. Club 93: 385-401.
121. Tukey, H. B., Jr. 1971. Leaching of substances from plants. In: Biochemical Interactions among Plants. Natl. Acad. Sci., Washington, D.C., 25-32.
122. Turner, J. A. and Rice, E. L. 1975. Microbial decomposition of ferulic acid in soil. J. Chem. Ecol. 1: 41-58.
123. Vaughan, D., Jones, D., and Ord, B. G. 1993. Amelioration by Voltuella ciliata of the phytotoxicity of vanillic acid towards the growth of Pisum sativum L. Soil Biol. Biochem. 25: 11-17
124. Vaughan, D. and Ord, B. G. 1991. Extraction of potential allelochemicals and their effects on root morphology and nutrient contents. In: Plant Root Growth: An Ecological Perspective. Brit. Ecol. Soc. Special Publication No. 10. Blackwell Scientific Publications, Oxford, 399-421.
125. Vaughan, D., Sparling, G. P., and Ord, B. G. 1983. Amelioration of the phytotoxicity of phenolic acids by some soil microbes. Soil Biol. Biochem. 15: 613-614.
126. Wacker, T. L., Safir, G. R., and Stephens, C.T. 1990. Effects of ferulic acid on Glomus fasciculatum and associated effects on phosphorus uptake and growth of asparagus (Asparagus officinalis L.). J. Chem. Ecol. 16: 901-909.
127. Wang, T. S. C., Huang, P. M., Chou, C-H., and Chen, J-H. 1986. The role of soil minerals in the abiotic polymerization of phenolic compounds and formation of humic substances. In: Interactions of Soil Minerals with Natural Organics and Microbes. Huang, P. M. and Schnitzer, M., Eds., Soil Sci. Soc. of Am., Madison Wisconsin. SSSA Special Publication Number 17, 251-281.
128. Waters, E. R. and Blum, U. 1987. Effects of single and multiple exposures of ferulic acid on the vegetative and reproductive growth of Phaseolus vulgaris BBL-290. Am. J. Bot. 74: 1635-1645.
129. Watson, J. R., Posner, A. M., and Quirk, J. P. 1973. Adsorption of herbicide 2,4-D on goethite. J. Soil Sci. 24: 503-511.
130. Weidenhamer, J. D., Hartnett, D. C., and Romeo, J. T. 1989. Density-dependent phytotoxicity: distinguishing resource competition and allelopathic interference in plants. J. Appl. Ecol. 26: 613-624.
131. Whitehead, D. C., Dibb, H. and Hartley, R. D. 1982. Phenolic compounds in soil as influenced by the growth of different plant species. J. Appl. Ecol. 19: 579-588.
132. Whitehead, D. C., Dibb, H., and Hartley, R. D. 1983. Bound phenolic compounds in water extracts of soils, plant roots and leaf litter. Soil Biol. Biochem. 15: 133-136.
133. Williamson, B. G. Allelopathy, Koch's Postulates, and the Neck Riddle. 1990. In: Perspectives on Plant Competition. Grace, J. B. and Tilman, D., Eds., Academic Press, San Diego, California, 143-162.
134. Willis, R. J. 1985. The historical bases of the concept of allelopathy. J. History Biol. 18: 71-102.
135. Wilson, R. E. and Rice, E. L. 1968. Allelopathy as expressed by Helinathus annuus and its role in old-field succession. Bull. Torrey Bot. Club 95: 432-448.
136. Yu, J. Q. and Matsui, Y. 1997. Effects of root exudates of cucumber (Cucumis sativus) and allelochemicals on ion uptake by cucumber seedlings. J. Chem. Ecol. 23: 817-827.