Uptake and utilization of atmospheric ammonia in three native Poaceae species: leaf conductances, composition of apoplastic solution and interactions with root nitrogen supply

absorption ammonia ammoniac arrhenatherum elatius azote bromus crecimiento croissance estoma feuille gas exchange gramineae growth hojas intercambio de gases leaf conductance leaves ligasas ligase ligases mineral nutrients nitrogen nutrientes minerales nutrition des plantes photorespiratory pathway photosynthese photosynthesis plant nutrition stomata stomatal resistance stomate transpiration