C4 photosynthesis, a carbon concentrating mechanism, evolved as an adaptation to improve photosynthetic CO2 assimilation in terrestrial plants under conditions of low CO2, increased temperatures and varying rainfall patterns.

Cell-to-cell communication is essential for the co-ordination of responses in all multicellular organisms. One mechanism plants employ as defence against pathogens is restriction of cell-to-cell communication by plasmodesmata closure during infection.

In plants, microRNAs (miRNAs) are short non-coding RNAs of approximately 20-24 nt in length which are involved in post-transcriptional regulation of genes controlling many fundamental biological pathways.

Specialised metabolites are one of the major means of how microbes and sessile organisms express extended phenotype for the selective advantage of the organisms —or, more fundamentally, their genes.

Natural capital describes the stocks of renewable and non-renewable resources (e.g. plants, animals, air, water, soils and minerals) that produce flows of benefits to people.

Source-to-sink allocation of, and sink-to-sink competition for, photoassimilates, mainly in the form of sucrose, play a key role in determining energy and resource distribution in plants for growth and reproduction.