Role of PIN-mediated auxin efflux in apical hook development of Arabidopsis thaliana

Role of PIN-mediated auxin efflux in apical hook development of Arabidopsis thaliana. Žádníková, P., Petrášek, J., Marhavý, P., Raz, V., Vandenbussche, F., Ding, Z., Schwarzerová, K., Morita, M. T., Tasaka, M., Hejátko, J., Van Der Straeten, D., Friml, J., & Benková, E. Development, 137(4):607–617, February, 2010.

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The apical hook of dark-grown Arabidopsis seedlings is a simple structure that develops soon after germination to protect the meristem tissues during emergence through the soil and that opens upon exposure to light. Differential growth at the apical hook proceeds in three sequential steps that are regulated by multiple hormones, principally auxin and ethylene. We show that the progress of the apical hook through these developmental phases depends on the dynamic, asymmetric distribution of auxin, which is regulated by auxin efflux carriers of the PIN family. Several PIN proteins exhibited specific, partially overlapping spatial and temporal expression patterns, and their subcellular localization suggested auxin fluxes during hook development. Genetic manipulation of individual PIN activities interfered with different stages of hook development, implying that specific combinations of PIN genes are required for progress of the apical hook through the developmental phases. Furthermore, ethylene might modulate apical hook development by prolonging the formation phase and strongly suppressing the maintenance phase. This ethylene effect is in part mediated by regulation of PIN-dependent auxin efflux and auxin signaling.

@article{zadnikova_role_2010,
	title = {Role of {PIN}-mediated auxin efflux in apical hook development of \textit{{Arabidopsis} thaliana}},
	volume = {137},
	issn = {1477-9129, 0950-1991},
	url = {https://journals.biologists.com/dev/article/137/4/607/44209/Role-of-PIN-mediated-auxin-efflux-in-apical-hook},
	doi = {10/cs9rb3},
	abstract = {The apical hook of dark-grown Arabidopsis seedlings is a simple structure that develops soon after germination to protect the meristem tissues during emergence through the soil and that opens upon exposure to light. Differential growth at the apical hook proceeds in three sequential steps that are regulated by multiple hormones, principally auxin and ethylene. We show that the progress of the apical hook through these developmental phases depends on the dynamic, asymmetric distribution of auxin, which is regulated by auxin efflux carriers of the PIN family. Several PIN proteins exhibited specific, partially overlapping spatial and temporal expression patterns, and their subcellular localization suggested auxin fluxes during hook development. Genetic manipulation of individual PIN activities interfered with different stages of hook development, implying that specific combinations of PIN genes are required for progress of the apical hook through the developmental phases. Furthermore, ethylene might modulate apical hook development by prolonging the formation phase and strongly suppressing the maintenance phase. This ethylene effect is in part mediated by regulation of PIN-dependent auxin efflux and auxin signaling.},
	language = {en},
	number = {4},
	urldate = {2021-06-08},
	journal = {Development},
	author = {Žádníková, Petra and Petrášek, Jan and Marhavý, Peter and Raz, Vered and Vandenbussche, Filip and Ding, Zhaojun and Schwarzerová, Kateřina and Morita, Miyo T. and Tasaka, Masao and Hejátko, Jan and Van Der Straeten, Dominique and Friml, Jiří and Benková, Eva},
	month = feb,
	year = {2010},
	pages = {607--617},
}

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