The following paper provides evidence that photorespiration is not just
a wasteful process, as often presented in textbooks, but plays an
essential role in nitrate assimilation.
Rachmilevitch, S., Cousins, A.B. and Bloom, A.J. 2004. Nitrate
assimilation in plant shoots depends on photorespiration. Proc. Nat.
Acad. Sci. 101(31): 11506-10.
http://www.pnas.org/cgi/content/abstract/101/31/11506
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