but vacuolar nitrate did not decrease for P.arundinacea and C.stricta suggesting that it does not serve as a nitrogen reserve for use during nitrogen deprivation in these species.
after 4 months of nitrogen deprivation P.arundinacea double a in 12 day after being supplied 15 mM nitrogen whereas a for C.stricta increase only 22% we propose that one factor linking P.arundinacea abundance to nitrogen availability involves this species'plastic response of carbon gain to nitrogen supply