Plant root systems can respond to nutrient availability and distribution by changing the three-dimensional deployment of their root architecture.
Thus, we assume that irrigation decisions respond to the availability of water sources in the farm and moments of rainfall distribution.
A limitation of these analyses is that they do not answer the question of what exact loads respond to wind availability.
Better understanding of how plants respond to nitrate availability in soil and regulate nitrate uptake is important in finding suitable solutions to over-fertilization as well as remedy for nitrogen deficiency.
The model facultative aerobe Escherichia coli, the microbial cell factory par excellence, has elaborate sensing and signal transduction mechanisms that respond to the availability of electron acceptors and alternative carbon sources in the surrounding environment.
As one of best sources from which save energy and improve workplace functionality, whole lighting systems can respond to the availability of natural light or presence of occupants spread across a building and automatically adjust in real time down to the level of a single bulb.
Interestingly, another obligate intracellular pathogen, Coxiella burnetii, that occupies a phagolysosomal-like vacuole [55], also exhibits a minimal capacity to respond to iron availability [17].
We may ask how these singular genes behave to respond to oxygen availability in K. lactis and question whether K. lactis and S. cerevisiae share similar gene categories involved in oxygen response.
The situation in higher organisms is likely complicated by the fact that they are less able to respond to reduced availability of metabolic energy, explaining the more severe phenotypes of mitochondrial SOD knockout in such species [63], [64].
