The morphology of almost all grasses can be conceptualized as a hierarchical arrangement of subunits, termed phytomers. Therefore, knowledge of phytomer growth and development serves as a basis to elucidate the rhythm of grass growth. A recent study published in AoB PLANTS by Yang et al. provides systematic analyses of the process of phytomer development of Cleistogenes squarrosa, a perennial C4 grass.
The invariant coordination of elongation within and between phytomers was a stable developmental feature across treatments, thus the quantitative coordination rules are applicable for predicting morphological development of C. squarrosa under contrasting levels of nitrogen nutrition or vapour pressure deficit.
Yang, F., Gong, X. Y., Liu, H. T., Schäufele, R., & Schnyder, H. (2016). Effects of nitrogen and vapour pressure deficit on phytomer growth and development in a C4 grass. AoB Plants, 8, plw075. http://dx.doi.org/10.1093/aobpla/plw075