TY  - JA
AU  - Bergvinson,D.J.
AU  - Arnason,J.T.
AU  - Hamilton,R.I.
TI  - Phytochemical changes during recurrent selection for resistance to the European corn borer
SN  - 0011-183X
U1  - 1998-094202 
PY  - 1997///
KW  - Acids
KW  - Allelochemicals
KW  - Allomones
KW  - America
KW  - Aromatic compounds
KW  - Biological analysis
KW  - Breeding methods
KW  - AGROVOC
KW  - Canada
KW  - Cell structure
KW  - Chemicophysical properties
KW  - cinnamic acids
KW  - Gramineae
KW  - Insecta
KW  - Lepidoptera
KW  - North America
KW  - Nutritive value
KW  - Organic acids
KW  - Ostrinia
KW  - Pests of plants
KW  - Phenolic acids
KW  - Phenolic compounds
KW  - Plant anatomy
KW  - Plant genetics and breeding
KW  - NOT IN AGROVOC
KW  - Plant physiology and biochemistry
KW  - Plant vascular system
KW  - Plant vegetative organs
KW  - Proximate composition
KW  - Pyralidae
KW  - Quality
KW  - Resistance to injurious factors
KW  - Selection
KW  - Semiochemicals
KW  - Stele
KW  - Zea
N1  - references US (DNAL 64.8 C883)
N2  - 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
T2  - Crop science (USA). (Sep-Oct 1997). v. 37(5) p. 1567-1572
ER  -