Role of the Arabidopsis PIN6 auxin transporter in auxin homeostasis and auxin-mediated development

Cazzonelli, Christopher I and Vanstraelen, Marleen and Simon, Sibu and Yin, Kuide and Carron-Arthur, Ashley and Nisar, Nazia and Tarle, Gauri and Cuttriss, Abby J and Searle, Iain R and Benková, Eva and Mathesius, Ulrike and Masle, Josette and Friml, Jiří and Pogson, Barry J (2013) Role of the Arabidopsis PIN6 auxin transporter in auxin homeostasis and auxin-mediated development. PLoS One, 8 (7). Article No. e70069. ISSN 1932-6203

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Abstract

Plant-specific PIN-formed (PIN) efflux transporters for the plant hormone auxin are required for tissue-specific directional auxin transport and cellular auxin homeostasis. The Arabidopsis PIN protein family has been shown to play important roles in developmental processes such as embryogenesis, organogenesis, vascular tissue differentiation, root meristem patterning and tropic growth. Here we analyzed roles of the less characterised Arabidopsis PIN6 auxin transporter. PIN6 is auxin-inducible and is expressed during multiple auxin-regulated developmental processes. Loss of pin6 function interfered with primary root growth and lateral root development. Misexpression of PIN6 affected auxin transport and interfered with auxin homeostasis in other growth processes such as shoot apical dominance, lateral root primordia development, adventitious root formation, root hair outgrowth and root waving. These changes in auxin-regulated growth correlated with a reduction in total auxin transport as well as with an altered activity of DR5-GUS auxin response reporter. Overall, the data indicate that PIN6 regulates auxin homeostasis during plant development.

Item Type: Article
DOI: 10.1371/journal.pone.0070069
Subjects: 500 Science > 570 Life sciences; biology
500 Science > 580 Plants
Research Group: Benkova Group
Friml Group
SWORD Depositor: Sword Import User
Depositing User: Sword Import User
Date Deposited: 23 Dec 2015 07:59
Last Modified: 05 Sep 2017 14:14
URI: https://repository.ist.ac.at/id/eprint/393

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