Citrus limon seedlings without functional chloroplasts are unable to induce phenylalanine ammonia-lyase in response to inoculation with Alternaria alternata

H. Prieto; M. Chiong; D. Seelenfreund; J. Garrido; A. Quaas; L. M. Perez

doi:10.1016/S0176-1617(97)80278-7

Citrus limon seedlings without functional chloroplasts are unable to induce phenylalanine ammonia-lyase in response to inoculation with Alternaria alternata

H. Prieto, M. Chiong, D. Seelenfreund, J. Garrido, A. Quaas, L. M. Perez

Universidad de Chile

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

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Abstract

A light-dependent bleaching of plastids was induced in lemon seedlings through cultivation in the presence of the herbicide Norfluorazon (NFZ). Also, etiolated seedlings were obtained by cultivation under continuous dark conditions. When both types of seedlings were challenged with Alternaria alternata conidia, they were unable to induce phenylalanine ammonia-lyase, PAL (E.C. 4.3.1.5.). Cell ultrastructure of control seedlings showed the presence of chloroplasts, while NFZ-treated lemon seedlings showed altered chloroplasts and in etiolated seedlings only proplastids were observed. In addition, CO₂ assimilation was not detected in NFZ-treated and etiolated seedlings, as compared to controls.

Original language	English
Pages (from-to)	645-651
Number of pages	7
Journal	Journal of Plant Physiology
Volume	150
Issue number	6
DOIs	https://doi.org/10.1016/S0176-1617(97)80278-7
Publication status	Published - 1997

ASJC Scopus Subject Areas

Physiology
Agronomy and Crop Science
Plant Science

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10.1016/S0176-1617(97)80278-7

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title = "Citrus limon seedlings without functional chloroplasts are unable to induce phenylalanine ammonia-lyase in response to inoculation with Alternaria alternata",

abstract = "A light-dependent bleaching of plastids was induced in lemon seedlings through cultivation in the presence of the herbicide Norfluorazon (NFZ). Also, etiolated seedlings were obtained by cultivation under continuous dark conditions. When both types of seedlings were challenged with Alternaria alternata conidia, they were unable to induce phenylalanine ammonia-lyase, PAL (E.C. 4.3.1.5.). Cell ultrastructure of control seedlings showed the presence of chloroplasts, while NFZ-treated lemon seedlings showed altered chloroplasts and in etiolated seedlings only proplastids were observed. In addition, CO2 assimilation was not detected in NFZ-treated and etiolated seedlings, as compared to controls.",

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T1 - Citrus limon seedlings without functional chloroplasts are unable to induce phenylalanine ammonia-lyase in response to inoculation with Alternaria alternata

AU - Prieto, H.

AU - Chiong, M.

AU - Seelenfreund, D.

AU - Garrido, J.

AU - Quaas, A.

AU - Perez, L. M.

PY - 1997

Y1 - 1997

N2 - A light-dependent bleaching of plastids was induced in lemon seedlings through cultivation in the presence of the herbicide Norfluorazon (NFZ). Also, etiolated seedlings were obtained by cultivation under continuous dark conditions. When both types of seedlings were challenged with Alternaria alternata conidia, they were unable to induce phenylalanine ammonia-lyase, PAL (E.C. 4.3.1.5.). Cell ultrastructure of control seedlings showed the presence of chloroplasts, while NFZ-treated lemon seedlings showed altered chloroplasts and in etiolated seedlings only proplastids were observed. In addition, CO2 assimilation was not detected in NFZ-treated and etiolated seedlings, as compared to controls.

AB - A light-dependent bleaching of plastids was induced in lemon seedlings through cultivation in the presence of the herbicide Norfluorazon (NFZ). Also, etiolated seedlings were obtained by cultivation under continuous dark conditions. When both types of seedlings were challenged with Alternaria alternata conidia, they were unable to induce phenylalanine ammonia-lyase, PAL (E.C. 4.3.1.5.). Cell ultrastructure of control seedlings showed the presence of chloroplasts, while NFZ-treated lemon seedlings showed altered chloroplasts and in etiolated seedlings only proplastids were observed. In addition, CO2 assimilation was not detected in NFZ-treated and etiolated seedlings, as compared to controls.

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Citrus limon seedlings without functional chloroplasts are unable to induce phenylalanine ammonia-lyase in response to inoculation with Alternaria alternata

Abstract

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