Mar 7, 2019 · Our results show that the previously unrecognized root cap cuticle protects the root meristem during the critical phase of seedling establishment and promotes the efficient formation of lateral roots.

Oct 15, 2021 · To provide a detailed analysis of the contribution of cap cells to Arabidopsis root gravitropism, we used laser ablation to remove groups of cells in the root cap and observed the root's response to gravistimulation.

Apr 1, 2019 · We identify a cytokinin-dependent molecular mechanism that acts in the LRC to control the position of the TZ and meristem size.

May 20, 2019 · In order to reveal the important role of AXR3-mediated auxin signaling in the regulation of starch granule accumulation in the root apex, we used the root cap-specific promoters pCEL5 to drive the expression of AXR3-1 in order to exclusively disrupt this auxin signaling pathway within the root apex.

Jan 1, 1999 · Arabidopsis root caps have a simple cellular organization (Scheres and Wolkenfelt, 1998) and the transparency of the root cap allows optical sectioning deep into the root (Figure IA). The latter feature is important for targeting inner cells in the cap with a laser beam.

Here, we report that stem cell proliferation induced cell separation at the periphery of the root cap, resulting in tissue size homeostasis. An auxin response gradient with a maximum in the QC and a minimum in the detaching layer was established prior to the onset of cell separation.

Cell separation in plants requires partial degradation of cell walls. Indeed, ROOT CAP POLYGALACTURONASE (RCPG), encoding a putative pectin-degrading enzyme, acts downstream of BRN1 and BRN2, and BRN1 can directly bind to …

Jun 10, 2023 · Our results indicate a central role of root caps in microbiome assembly with ripple-on effects affecting higher trophic levels and microbiome composition on older root zones. Root microbiomes are critical to plant health and productivity (Giri et al., 2018; Cantó et al., 2020; Trivedi et al., 2020).

Nov 1, 2016 · We performed a detailed expression analysis of three regulators of root cap differentiation, SOMBRERO, BEARSKIN1 and BEARSKIN2, and identified their downstream genes. Our results indicate that expression of BEARSKIN1 and BEARSKIN2 is associated with cell positioning on the root surface.

We propose that a tight regulation of host dPCD and rapid and complete root cap clearance play important roles in restricting fungal colonization at the root apical meristem. Furthermore, we show that S. indica downregulates BFN1 in older and differentiated epidermal cells to promote fungal accommodation.