RSA in monocots
Monocots comprises of fibrous roots and have more complex root structure
than dicots. Fibrous roots in monocots generally refers to the nodal
roots along with many finer roots (Maqbool et al., 2022). Generally, in
monocots the formation of shoot-borne roots a.k.a nodal roots is
necessary to increase the vasculature system as monocots lack secondary
thickening in roots and thereby lead to increased uptake of nutrients
and water. In wheat, two types of roots are present; nodal roots which
originates from basal portion of tillers and seminal roots which
originates from embryonic seed part (Manske et al 2002;Wasaya et al.,
2018) while only embryonic primary roots are present in rice. LR are
developed from cells of pericycle, however it has been reported that in
monocots such as rice and maize, pericycle cells of xylem poles are not
competent to produce LR and thereby initiation of those occurs in
endodermal and pericycle cells opposite phloem poles (Yu et al., 2016).