Upon long-lasting stress, the levels of amino acids including valine, tyrosine, serine, phenyalanine, glycine, glutamine and glutamic acid showed a coordinated increase which might be due to enhanced protein catabolism and/or re-allocation of nitrogen caused by growth inhibition.
On the one hand, those processes drive the development of the plant structure and on the other hand, the developed structure again influences these processes (e.g., photosynthesis, hormone synthesis and transport, and allocation of carbon, nitrogen, etc.).
On the one hand, those processes drive the development of the plant structure and on the other hand, the developed structure again influences these processes (e.g., photosynthesis, hormone synthesis and transport, and allocation of carbon, nitrogen, etc).. To study this dependence, simulation models, termed functional structural plant models (FSPMs), are developed.
We used the physiological measurements for Douglas fir in a model to simulate canopy photosynthetic potential (daily net carbon gain limited only by PPFD) and tested the hypothesis that allocation of carbon and nitrogen is optimized relative to PPFD gradients.
While elevated pCO2 and temperature resulted in higher growth rates, higher N2 fixation rates, and higher C∶P ratios, photosynthesis, protein pools, and total cellular allocation of carbon and nitrogen were not significantly affected [5].
Ageratina adenophora was reported to allocate greater amounts of nitrogen to photosynthesis (growth) and reduced allocation to cell walls (defence), thus resulting in an increase in its growth and vigour in the introduced ranges (Feng et al. 2009, 2011).
Tolerance to defoliation in A. hybridus was associated with a greater investment in below-ground biomass relative to above-ground vegetative biomass, occurring mostly as the result of pre-flowering allocation of carbohydrates (CHOs) and nitrogen resources to the taproot [ 9, 10].
Faster plant growth and higher seed yield requires greater supply of nitrogen or re-allocation of available nitrogen sources.
Kalcsits, L. A., Buschhaus, H. A. & Guy, R. D. Nitrogen isotope discrimination as an integrated measure of nitrogen fluxes, assimilation and allocation in plants.
