Auxin Transport Promotes Arabidopsis Lateral Root Initiation. Casimiro, I., Marchant, A., Bhalerao, R. P., Beeckman, T., Dhooge, S., Swarup, R., Graham, N., Inzé, D., Sandberg, G., Casero, P. J., & Bennett, M. The Plant Cell, 13(4):843–852, April, 2001. ![Auxin Transport Promotes Arabidopsis Lateral Root Initiation [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Lateral root development in Arabidopsis provides a model for the study of hormonal signals that regulate postembryonic organogenesis in higher plants. Lateral roots originate from pairs of pericycle cells, in several cell files positioned opposite the xylem pole, that initiate a series of asymmetric, transverse divisions. The auxin transport inhibitor N-1-naphthylphthalamic acid (NPA) arrests lateral root development by blocking the first transverse division(s). We investigated the basis of NPA action by using a cell-specific reporter to demonstrate that xylem pole pericycle cells retain their identity in the presence of the auxin transport inhibitor. However, NPA causes indoleacetic acid (IAA) to accumulate in the root apex while reducing levels in basal tissues critical for lateral root initiation. This pattern of IAA redistribution is consistent with NPA blocking basipetal IAA movement from the root tip. Characterization of lateral root development in the shoot meristemless1 mutant demonstrates that root basipetal and leaf acropetal auxin transport activities are required during the initiation and emergence phases, respectively, of lateral root development.
@article{casimiro_auxin_2001,
title = {Auxin {Transport} {Promotes} {Arabidopsis} {Lateral} {Root} {Initiation}},
volume = {13},
issn = {1040-4651},
url = {https://doi.org/10.1105/tpc.13.4.843},
doi = {10.1105/tpc.13.4.843},
abstract = {Lateral root development in Arabidopsis provides a model for the study of hormonal signals that regulate postembryonic organogenesis in higher plants. Lateral roots originate from pairs of pericycle cells, in several cell files positioned opposite the xylem pole, that initiate a series of asymmetric, transverse divisions. The auxin transport inhibitor N-1-naphthylphthalamic acid (NPA) arrests lateral root development by blocking the first transverse division(s). We investigated the basis of NPA action by using a cell-specific reporter to demonstrate that xylem pole pericycle cells retain their identity in the presence of the auxin transport inhibitor. However, NPA causes indoleacetic acid (IAA) to accumulate in the root apex while reducing levels in basal tissues critical for lateral root initiation. This pattern of IAA redistribution is consistent with NPA blocking basipetal IAA movement from the root tip. Characterization of lateral root development in the shoot meristemless1 mutant demonstrates that root basipetal and leaf acropetal auxin transport activities are required during the initiation and emergence phases, respectively, of lateral root development.},
number = {4},
urldate = {2021-11-02},
journal = {The Plant Cell},
author = {Casimiro, Ilda and Marchant, Alan and Bhalerao, Rishikesh P. and Beeckman, Tom and Dhooge, Sandra and Swarup, Ranjan and Graham, Neil and Inzé, Dirk and Sandberg, Goran and Casero, Pedro J. and Bennett, Malcolm},
month = apr,
year = {2001},
pages = {843--852},
}
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The auxin transport inhibitor N-1-naphthylphthalamic acid (NPA) arrests lateral root development by blocking the first transverse division(s). We investigated the basis of NPA action by using a cell-specific reporter to demonstrate that xylem pole pericycle cells retain their identity in the presence of the auxin transport inhibitor. However, NPA causes indoleacetic acid (IAA) to accumulate in the root apex while reducing levels in basal tissues critical for lateral root initiation. This pattern of IAA redistribution is consistent with NPA blocking basipetal IAA movement from the root tip. Characterization of lateral root development in the shoot meristemless1 mutant demonstrates that root basipetal and leaf acropetal auxin transport activities are required during the initiation and emergence phases, respectively, of lateral root development.","number":"4","urldate":"2021-11-02","journal":"The Plant Cell","author":[{"propositions":[],"lastnames":["Casimiro"],"firstnames":["Ilda"],"suffixes":[]},{"propositions":[],"lastnames":["Marchant"],"firstnames":["Alan"],"suffixes":[]},{"propositions":[],"lastnames":["Bhalerao"],"firstnames":["Rishikesh","P."],"suffixes":[]},{"propositions":[],"lastnames":["Beeckman"],"firstnames":["Tom"],"suffixes":[]},{"propositions":[],"lastnames":["Dhooge"],"firstnames":["Sandra"],"suffixes":[]},{"propositions":[],"lastnames":["Swarup"],"firstnames":["Ranjan"],"suffixes":[]},{"propositions":[],"lastnames":["Graham"],"firstnames":["Neil"],"suffixes":[]},{"propositions":[],"lastnames":["Inzé"],"firstnames":["Dirk"],"suffixes":[]},{"propositions":[],"lastnames":["Sandberg"],"firstnames":["Goran"],"suffixes":[]},{"propositions":[],"lastnames":["Casero"],"firstnames":["Pedro","J."],"suffixes":[]},{"propositions":[],"lastnames":["Bennett"],"firstnames":["Malcolm"],"suffixes":[]}],"month":"April","year":"2001","pages":"843–852","bibtex":"@article{casimiro_auxin_2001,\n\ttitle = {Auxin {Transport} {Promotes} {Arabidopsis} {Lateral} {Root} {Initiation}},\n\tvolume = {13},\n\tissn = {1040-4651},\n\turl = {https://doi.org/10.1105/tpc.13.4.843},\n\tdoi = {10.1105/tpc.13.4.843},\n\tabstract = {Lateral root development in Arabidopsis provides a model for the study of hormonal signals that regulate postembryonic organogenesis in higher plants. Lateral roots originate from pairs of pericycle cells, in several cell files positioned opposite the xylem pole, that initiate a series of asymmetric, transverse divisions. The auxin transport inhibitor N-1-naphthylphthalamic acid (NPA) arrests lateral root development by blocking the first transverse division(s). We investigated the basis of NPA action by using a cell-specific reporter to demonstrate that xylem pole pericycle cells retain their identity in the presence of the auxin transport inhibitor. However, NPA causes indoleacetic acid (IAA) to accumulate in the root apex while reducing levels in basal tissues critical for lateral root initiation. This pattern of IAA redistribution is consistent with NPA blocking basipetal IAA movement from the root tip. 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