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Phytochemical changes during recurrent selection for resistance to the European corn borer

By: Bergvinson, D.J.
Contributor(s): Arnason, J.T [coaut.] | Hamilton, R.I [coaut.].
Material type: materialTypeLabelArticlePublisher: 1997ISSN: 0011-183X.Subject(s): Acids | Allelochemicals | Allomones | America | Aromatic compounds | Biological analysis | Breeding methods | Canada | Cell structure | Chemicophysical properties | cinnamic acids | Gramineae | Insecta | Lepidoptera | North America | Nutritive value | Organic acids | Ostrinia | Pests of plants | Phenolic acids | Phenolic compounds | Plant anatomy | Plant genetics and breeding | Plant physiology and biochemistry | Plant vascular system | Plant vegetative organs | Proximate composition | Pyralidae | Quality | Resistance to injurious factors | Selection | Semiochemicals | Stele | ZeaDDC classification: 1998-094202 In: Crop science (USA). (Sep-Oct 1997). v. 37(5) p. 1567-1572Summary: Feeding performance of herbivorous insects is influenced by host plant nutritional quality which can be improved for insect resistance by artificial selection. This study was conducted to determine which biochemical constituents in maize (Zea mays L.) change during recurrent selection for resistance to first- and second-generation European corn borer (ECB) [Ostrinia nubilalis (Hubner)]. Four cycles of selection (C0, C2, C4, and C5) from the BS9 population were field grown, artificially and naturally infested with ECB, and the following tissues sampled for biochemical analysis: immature and mature leaf blade, leaf sheath, rind, node, and pith. Tissue was analyzed for percent protein, DIMBOA [2,4-dihydroxy-7-methoxy 2H-1,4-benzoxazin-3 (4H)-one], fiber, and cell wall-bound phenolics, which included p-coumaric acid (pCA), ferulic acid (FA), cyclobutane dimers (CBD), and diferulic acid (DFA). Leaf and stalk toughness were also determined and showed significant increases over cycles of selection. Protein content was lowest in stalk tissues with advanced cycles having lower levels, but leaf protein content did not differ significantly. DFA reached high levels in the rind (0.85 mg/g) and leaf sheath (1.35 mg/g) tissues, and increased significantly in immature leaf tissue (0.55-1.02 mg/g) over cycles of selection and may serve to fortify tender whorl tissue. Number of tunnels per stalk was negatively correlated with DFA content in the pith (r = -77, P = 0.02). Microspectrophotometer determinations of epidermal cell wall absorbance for leaf blade and rind tissue showed increased absorbances (23 and 27%, respectively) in the spectral region characteristic of phenolic acids over cycles of selection Phenolic acids, in particular DFA, have increased over cycles of selection to render maize tissue more resistant through fortification of cell walls, especially in leaf and rind epidermal tissueCollection: AGRIS Collection
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Article CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

AGRIS Collection 1998-094202 (Browse shelf) Available
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references US (DNAL 64.8 C883)

Feeding performance of herbivorous insects is influenced by host plant nutritional quality which can be improved for insect resistance by artificial selection. This study was conducted to determine which biochemical constituents in maize (Zea mays L.) change during recurrent selection for resistance to first- and second-generation European corn borer (ECB) [Ostrinia nubilalis (Hubner)]. Four cycles of selection (C0, C2, C4, and C5) from the BS9 population were field grown, artificially and naturally infested with ECB, and the following tissues sampled for biochemical analysis: immature and mature leaf blade, leaf sheath, rind, node, and pith. Tissue was analyzed for percent protein, DIMBOA [2,4-dihydroxy-7-methoxy 2H-1,4-benzoxazin-3 (4H)-one], fiber, and cell wall-bound phenolics, which included p-coumaric acid (pCA), ferulic acid (FA), cyclobutane dimers (CBD), and diferulic acid (DFA). Leaf and stalk toughness were also determined and showed significant increases over cycles of selection. Protein content was lowest in stalk tissues with advanced cycles having lower levels, but leaf protein content did not differ significantly. DFA reached high levels in the rind (0.85 mg/g) and leaf sheath (1.35 mg/g) tissues, and increased significantly in immature leaf tissue (0.55-1.02 mg/g) over cycles of selection and may serve to fortify tender whorl tissue. Number of tunnels per stalk was negatively correlated with DFA content in the pith (r = -77, P = 0.02). Microspectrophotometer determinations of epidermal cell wall absorbance for leaf blade and rind tissue showed increased absorbances (23 and 27%, respectively) in the spectral region characteristic of phenolic acids over cycles of selection Phenolic acids, in particular DFA, have increased over cycles of selection to render maize tissue more resistant through fortification of cell walls, especially in leaf and rind epidermal tissue

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