Regulation of amino acid uptake in conifers by exogenous and endogenous nitrogen. Persson, J. & Näsholm, T. Planta, 215(4):639–644, August, 2002. ![Regulation of amino acid uptake in conifers by exogenous and endogenous nitrogen [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Although an accumulating amount of research clearly indicates that plants are capable of taking up exogenous amino acids, the actual importance of such organic N sources for plant N nutrition is under debate. In this study, we show that amino acid uptake by Scots pine (Pinus sylvestris L.) is significantly decreased by elevated internal NH4+ levels, while it increases following exposure to exogenous amino acids. Furthermore, amino acid uptake is larger in N-deficient plants than in plants grown with a large access of N. The regulatory pattern of amino acid uptake shows important similarities to the regulation of NO3– and NH4+ transport as well as to the regulation of yeast amino acid transporters. In addition, our data suggest that uptake may be regulated by factors not originating from N metabolism. The up-regulation of uptake in response to N deficiency suggests that amino acid uptake may be a significant contributor to the N economy of P. sylvestris.
@article{persson_regulation_2002,
title = {Regulation of amino acid uptake in conifers by exogenous and endogenous nitrogen},
volume = {215},
issn = {1432-2048},
url = {https://doi.org/10.1007/s00425-002-0786-5},
doi = {10.1007/s00425-002-0786-5},
abstract = {Although an accumulating amount of research clearly indicates that plants are capable of taking up exogenous amino acids, the actual importance of such organic N sources for plant N nutrition is under debate. In this study, we show that amino acid uptake by Scots pine (Pinus sylvestris L.) is significantly decreased by elevated internal NH4+ levels, while it increases following exposure to exogenous amino acids. Furthermore, amino acid uptake is larger in N-deficient plants than in plants grown with a large access of N. The regulatory pattern of amino acid uptake shows important similarities to the regulation of NO3– and NH4+ transport as well as to the regulation of yeast amino acid transporters. In addition, our data suggest that uptake may be regulated by factors not originating from N metabolism. The up-regulation of uptake in response to N deficiency suggests that amino acid uptake may be a significant contributor to the N economy of P. sylvestris.},
language = {en},
number = {4},
urldate = {2021-10-19},
journal = {Planta},
author = {Persson, Jörgen and Näsholm, Torgny},
month = aug,
year = {2002},
pages = {639--644},
}
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