Resistance to toxin-mediated fungal infection: role of lignins, isoflavones, other seed phenolics, sugars, and boron in the mechanism of resistance to charcoal rot disease in soybean
被引:27
作者:
Bellaloui, N.
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机构:
USDA ARS, Crop Genet Res Unit, Stoneville, MS 38776 USAUSDA ARS, Crop Genet Res Unit, Stoneville, MS 38776 USA
Bellaloui, N.
[1
]
Mengistu, A.
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机构:
USDA ARS, Crop Genet Res Unit, Jackson, TN USAUSDA ARS, Crop Genet Res Unit, Stoneville, MS 38776 USA
Mengistu, A.
[2
]
Zobiole, L. H. S.
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机构:
RandD, Crop Protect, Dow AgroSci Brazil, Cascavel, Parana, BrazilUSDA ARS, Crop Genet Res Unit, Stoneville, MS 38776 USA
Zobiole, L. H. S.
[3
]
Shier, W. T.
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Univ Minnesota, Coll Pharm, Dept Med Chem, Minneapolis, MN 55455 USAUSDA ARS, Crop Genet Res Unit, Stoneville, MS 38776 USA
Shier, W. T.
[4
]
机构:
[1] USDA ARS, Crop Genet Res Unit, Stoneville, MS 38776 USA
[2] USDA ARS, Crop Genet Res Unit, Jackson, TN USA
[3] RandD, Crop Protect, Dow AgroSci Brazil, Cascavel, Parana, Brazil
[4] Univ Minnesota, Coll Pharm, Dept Med Chem, Minneapolis, MN 55455 USA
Charcoal rot disease in soybean is caused by the fungus Macrophomina phaseolina, which is believed to infect plants from soil through the roots by a toxin-mediated mechanism. Soybean genotypes exist which are susceptible (S) or moderately resistant (MR) to charcoal rot, but the mechanism of resistance is not known. Significantly (p <= 0.05) higher levels of phenolics, seed coat lignin, isoflavones, sugars, and total boron were observed in MR genotype than in S genotype seeds under irrigated and nonirrigated and under experimental M. phaseolina infested and noninfested conditions, indicating a possible association of these substances with resistance to toxin-mediated infection.