Nitrate and ammonium uptake by wheat seedlings as affected by salinity and light

M. A. Botella, A. Cerda, V. Martinez, S. H. Lips

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Nitrate (NO3 -) and ammonium (NH4+) are the two main forms of nitrogen (N) taken up by plants. Several environmental factors affect the uptake of N. This work was undertaken to study the induction of NO3 -and NH4+ transport systems in wheat (Triticum aestivum L.) roots as affected by salinity and light. Wheat seedlings were germinated in sterilized vermiculite and plants were grown in a growth chamber under controlled conditions for eight days with a nutrient solution without N, and with or without sodium chloride (NaCl). Uptake rates of NO3-, NH4+, or NH4+ + NO3- were calculated by measuring the disappearance of N from the solutions. The NO3- uptake developed with time, either through induction or activation. Salinity pretreatments increased net uptake rates of NO3- and NH4 +, suggesting that plants were in a higher N-deficient status when grown in saline conditions. Light decreased initial NO3- uptake but had little effect on initial NH4 + uptake.

Original languageEnglish
Pages (from-to)839-850
Number of pages12
JournalJournal of Plant Nutrition
Volume17
Issue number5
DOIs
StatePublished - 1 Apr 1994
Externally publishedYes

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science

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