Figure 3 Statistical data relating to nitrogen limitation.
The diel metatranscriptional profiles for January demonstrated considerable difference in functions (in addition to photosynthesis) between day and night; for example, transcripts relating to nitrogen cycling were found mostly during the day and were primarily associated with ammonification (Fig. 8B).
The NCF value is obtained by relating the nitrogen content of all amino acids to the molecular weight of the protein (determined either by calculation or by mass spectrometry).
The catalytic activity process does not directly correlate with the total nitrogen content; it relates to nitrogen of the quaternary type and depends on external surface areas of the samples studied.
Importantly, Fe (iron), molybdenum, sulfate and NH4+ are related to nitrogen fixation and nitrogen metabolism.
Figure 5 depicts the network for the cultivation parameters, which are most straightforwardly related to nitrogen metabolism, i.e. the different nitrogen sources, nitrogen as growth limiting element and combinatorial effects involving these cultivation parameters.
A significant number of the families that disappeared in the ancestor of both Mycospaerella species (TP13) are related to nitrogen catabolic processes, to the regulation of nitrogen utilization and sensing and to cellular responses towards nitrogen starvation.
In addition to RS measurements, the following in-situ measurements were taken: SPAD chlorophyll (closely related to nitrogen status), plant petiole nitrate-nitrogen concentrations, soil water content, and plant height, width, and leaf area index (LAI).
The PII-like protein that is produced by this gene regulates multiple cellular functions related to nitrogen metabolism, including ammonium transport and assimilation via glutamine synthetase, nitrogen fixation and nitrogen-responsive transcriptional regulation, by means of protein protein interactions (García-González et al. 2009).
Using suppression subtractive hybridization technology, Tang et al. separated a number of upregulated genes from P. tricornutum under nitrogen starvation, seven of which had high similarity with functional genes related to nitrogen utilization [ 37].
