The RopGEF KARAPPO is Essential for the Initiation of Vegetative Reproduction in Marchantia

Hiwatashi, Takuma; Quan, Koh Li; Yasui, Yukihiko; Takami, Hideyuki; Kajikawa, Masataka; Kirita, Hiroyuki; Sato, Mayuko; Wakazaki, Mayumi; Yamaguchi, Katsushi; Shigenobu, Shuji; Fukaki, Hidehiro; Mimura, Tetsuro; Yamato, Katsuyuki T.; Toyooka, Kiminori; Sawa, Shinichiro; Urano, Daisuke; Kohchi, Takayuki; Ishizaki, Kimitsune

doi:10.2139/ssrn.3236486

Cited by 1 publication

(1 citation statement)

References 33 publications

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“…MpRopGEF, a positive regulator of MpROP, which is specifically required to initiate gemma development 35 . There are, however, likely limits to the capability of a single ROP gene.…”

Section: The Ability Of Rop Regulators To Control Very Specific Aspec...mentioning

confidence: 99%

ROP GTPase regulates polarised cell growth and cell division orientation during tissue development and organogenesis inMarchantia polymorpha

Mulvey

Dolan

2023

Preprint

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Cell polarity — broadly defined as the asymmetric distribution of cellular activities and or subcellular components within a cell — determines the geometry of cell growth and division during development. RHO GTPase proteins regulate the establishment of cell polarity and are conserved among eukaryotes. RHO Of Plant (ROP) proteins are a subgroup of RHO GTPases that are required for cellular morphogenesis in plants. However, how ROP proteins modulate the geometry of cell growth and division during the morphogenesis of plant tissues and organs is not well understood. To investigate how ROP proteins function during tissue development and organogenesis, we characterised the function of the single copyROPgene of the liverwortMarchantia polymorpha.M. polymorphadevelops morphologically complex three-dimensional tissues and organs exemplified by air chambers and gemmae, respectively. Mproploss of function mutants form defective air chambers and gemmae, indicating ROP function is required for tissue development and organogenesis. During air chamber and gemma development in wild-type, the MpROP protein is enriched to sites of polarised growth at the cell surface and accumulates at the expanding cell plate of dividing cells. Consistent with these observations, polarised cell growth is lost, and cell divisions are misoriented in Mpropmutants. We propose that ROP regulates both polarised cell growth and cell division orientation in a coordinated manner to orchestrate tissue development and organogenesis in land plants.

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“…MpRopGEF, a positive regulator of MpROP, which is specifically required to initiate gemma development 35 . There are, however, likely limits to the capability of a single ROP gene.…”

Section: The Ability Of Rop Regulators To Control Very Specific Aspec...mentioning

confidence: 99%

ROP GTPase regulates polarised cell growth and cell division orientation during tissue development and organogenesis inMarchantia polymorpha

Mulvey

Dolan

2023

Preprint

View full text Add to dashboard Cite

show abstract

The RopGEF KARAPPO is Essential for the Initiation of Vegetative Reproduction in Marchantia

Cited by 1 publication

References 33 publications

ROP GTPase regulates polarised cell growth and cell division orientation during tissue development and organogenesis inMarchantia polymorpha

ROP GTPase regulates polarised cell growth and cell division orientation during tissue development and organogenesis inMarchantia polymorpha

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