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Dark CO/sub 2/ fixation in leaves of tomato plants grown with ammonium and nitrate as nitrogen sources

Journal Article:

Abstract

The dark (non-photosynthetic) CO/sub 2/ fixation was studied in the leaves of ammonium-fed and nitrate-fed tomato plants. The ability to fix /sup 14/CO/sub 2/ in the dark of ammonium-fed plants was remarkably lower as compared with nitrate-fed plants, supporting the previous finding that the synthesis of C/sub 4/-compounds from C/sub 3/-compounds was reduced in the leaves of ammonium-fed plants. There was no difference in the activity of PEP carboxylase in extracts prepared from the leaves between both the plants during an early period of the treatment. However, the enzyme activity began to decrease rapidly in ammonium-fed plants 4 days after the treatment. By long-term treatments, the enzyme activity in ammonium-fed plants became half as high as that of nitrate-fed plants. The decreased PEP carboxylase activity in ammonium-fed plants was not associated with the presence of NH/sub 4/-N and the absence of NO/sub 3/-N in the leaf extract, and was not restored by the addition of the leaf extract from nitrate-fed plants. It is concluded that the decreased rate of synthesis of C/sub 4/-compounds from C/sub 3/-compounds in ammonium-fed plants is closely associated with a decrease in the dark fixation involving PEP carboxylase.
Authors:
Ikeda, M; Yamada, Y [1] 
  1. Kyushu Univ., Fukuoka (Japan). Dept. of Agricultural Chemistry
Publication Date:
Jan 01, 1981
Product Type:
Journal Article
Reference Number:
AIX-12-641340; EDB-82-032456
Resource Relation:
Journal Name: Plant Soil; (Netherlands); Journal Volume: 60
Subject:
59 BASIC BIOLOGICAL SCIENCES; CARBON DIOXIDE; METABOLISM; AMMONIA; BIOSYNTHESIS; CARBON 14 COMPOUNDS; FERTILIZERS; LEAVES; NITRATES; PLANT BREEDING; TOMATOES; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; FOOD; HYDRIDES; HYDROGEN COMPOUNDS; LABELLED COMPOUNDS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; OXIDES; OXYGEN COMPOUNDS; SYNTHESIS; VEGETABLES; 550501* - Metabolism- Tracer Techniques
OSTI ID:
5822719
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: PLSOA
Submitting Site:
INIS
Size:
Pages: 213-222
Announcement Date:
Dec 01, 1981

Journal Article:

Citation Formats

Ikeda, M, and Yamada, Y. Dark CO/sub 2/ fixation in leaves of tomato plants grown with ammonium and nitrate as nitrogen sources. Netherlands: N. p., 1981. Web.
Ikeda, M, & Yamada, Y. Dark CO/sub 2/ fixation in leaves of tomato plants grown with ammonium and nitrate as nitrogen sources. Netherlands.
Ikeda, M, and Yamada, Y. 1981. "Dark CO/sub 2/ fixation in leaves of tomato plants grown with ammonium and nitrate as nitrogen sources." Netherlands.
@misc{etde_5822719,
title = {Dark CO/sub 2/ fixation in leaves of tomato plants grown with ammonium and nitrate as nitrogen sources}
author = {Ikeda, M, and Yamada, Y}
abstractNote = {The dark (non-photosynthetic) CO/sub 2/ fixation was studied in the leaves of ammonium-fed and nitrate-fed tomato plants. The ability to fix /sup 14/CO/sub 2/ in the dark of ammonium-fed plants was remarkably lower as compared with nitrate-fed plants, supporting the previous finding that the synthesis of C/sub 4/-compounds from C/sub 3/-compounds was reduced in the leaves of ammonium-fed plants. There was no difference in the activity of PEP carboxylase in extracts prepared from the leaves between both the plants during an early period of the treatment. However, the enzyme activity began to decrease rapidly in ammonium-fed plants 4 days after the treatment. By long-term treatments, the enzyme activity in ammonium-fed plants became half as high as that of nitrate-fed plants. The decreased PEP carboxylase activity in ammonium-fed plants was not associated with the presence of NH/sub 4/-N and the absence of NO/sub 3/-N in the leaf extract, and was not restored by the addition of the leaf extract from nitrate-fed plants. It is concluded that the decreased rate of synthesis of C/sub 4/-compounds from C/sub 3/-compounds in ammonium-fed plants is closely associated with a decrease in the dark fixation involving PEP carboxylase.}
journal = {Plant Soil; (Netherlands)}
volume = {60}
journal type = {AC}
place = {Netherlands}
year = {1981}
month = {Jan}
}