Physiological influences of fenoxaprop on corn (Zea mays)

C. E. Snipes; J. E. Street; D. S. Luthe

doi:10.1016/0048-3575(87)90128-3

Physiological influences of fenoxaprop on corn (Zea mays)

C. E. Snipes, J. E. Street, D. S. Luthe

Plant Science

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The ethyl ester of fenoxaprop [(±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid] applied to the foliage of corn resulted in a decrease in shoot fresh weight with each increase in herbicide concentration used, with no subsequent effect on root growth measured 96 hr after treatment. Root-applied fenoxaprop inhibited root growth 49% at a concentration of 2.5 μM. Total free amino acid content in treated tissue with 5 × 10^-3 M fenoxaprop (336 g ai/ha) for 96 hr increased 84% when compared with that in untreated tissue. Increases of 225 and 522% were recorded for histidine and arginine, respectively, while alanine, isoleucine, serine, and phenylalanine increased at least 100%. DNA content of corn increased 62% when foliar treated with a 5.0 × 10^-3 M concentration of fenoxaprop. Fenoxaprop at a concentration of 10^-5 M reduced indole-3-acetic acid-induced elongation of first internode sections 29%. Based on these data, fenoxaprop appears to be an auxin antagonist resulting in an accumulation of cellular compounds such as DNA and amino acids.

Original language	English (US)
Pages (from-to)	333-340
Number of pages	8
Journal	Pesticide Biochemistry and Physiology
Volume	28
Issue number	3
DOIs	https://doi.org/10.1016/0048-3575(87)90128-3
State	Published - Jul 1987

All Science Journal Classification (ASJC) codes

Agronomy and Crop Science
Health, Toxicology and Mutagenesis

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title = "Physiological influences of fenoxaprop on corn (Zea mays)",

abstract = "The ethyl ester of fenoxaprop [(±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid] applied to the foliage of corn resulted in a decrease in shoot fresh weight with each increase in herbicide concentration used, with no subsequent effect on root growth measured 96 hr after treatment. Root-applied fenoxaprop inhibited root growth 49% at a concentration of 2.5 μM. Total free amino acid content in treated tissue with 5 × 10-3 M fenoxaprop (336 g ai/ha) for 96 hr increased 84% when compared with that in untreated tissue. Increases of 225 and 522% were recorded for histidine and arginine, respectively, while alanine, isoleucine, serine, and phenylalanine increased at least 100%. DNA content of corn increased 62% when foliar treated with a 5.0 × 10-3 M concentration of fenoxaprop. Fenoxaprop at a concentration of 10-5 M reduced indole-3-acetic acid-induced elongation of first internode sections 29%. Based on these data, fenoxaprop appears to be an auxin antagonist resulting in an accumulation of cellular compounds such as DNA and amino acids.",

author = "Snipes, {C. E.} and Street, {J. E.} and Luthe, {D. S.}",

year = "1987",

month = jul,

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AU - Snipes, C. E.

AU - Street, J. E.

AU - Luthe, D. S.

PY - 1987/7

Y1 - 1987/7

N2 - The ethyl ester of fenoxaprop [(±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid] applied to the foliage of corn resulted in a decrease in shoot fresh weight with each increase in herbicide concentration used, with no subsequent effect on root growth measured 96 hr after treatment. Root-applied fenoxaprop inhibited root growth 49% at a concentration of 2.5 μM. Total free amino acid content in treated tissue with 5 × 10-3 M fenoxaprop (336 g ai/ha) for 96 hr increased 84% when compared with that in untreated tissue. Increases of 225 and 522% were recorded for histidine and arginine, respectively, while alanine, isoleucine, serine, and phenylalanine increased at least 100%. DNA content of corn increased 62% when foliar treated with a 5.0 × 10-3 M concentration of fenoxaprop. Fenoxaprop at a concentration of 10-5 M reduced indole-3-acetic acid-induced elongation of first internode sections 29%. Based on these data, fenoxaprop appears to be an auxin antagonist resulting in an accumulation of cellular compounds such as DNA and amino acids.

AB - The ethyl ester of fenoxaprop [(±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid] applied to the foliage of corn resulted in a decrease in shoot fresh weight with each increase in herbicide concentration used, with no subsequent effect on root growth measured 96 hr after treatment. Root-applied fenoxaprop inhibited root growth 49% at a concentration of 2.5 μM. Total free amino acid content in treated tissue with 5 × 10-3 M fenoxaprop (336 g ai/ha) for 96 hr increased 84% when compared with that in untreated tissue. Increases of 225 and 522% were recorded for histidine and arginine, respectively, while alanine, isoleucine, serine, and phenylalanine increased at least 100%. DNA content of corn increased 62% when foliar treated with a 5.0 × 10-3 M concentration of fenoxaprop. Fenoxaprop at a concentration of 10-5 M reduced indole-3-acetic acid-induced elongation of first internode sections 29%. Based on these data, fenoxaprop appears to be an auxin antagonist resulting in an accumulation of cellular compounds such as DNA and amino acids.

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Physiological influences of fenoxaprop on corn (Zea mays)

Abstract

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