Abstract
Phosphate (P) is an essential macronutrient for plant growth. Roots employ adaptive mechanisms to forage for P in soil. Root hair elongation is particularly important since P is immobile. Here we report that auxin plays a critical role promoting root hair growth in Arabidopsis in response to low external P. Mutants disrupting auxin synthesis (taa1) and transport (aux1) attenuate the low P root hair response. Conversely, targeting AUX1 expression in lateral root cap and epidermal cells rescues this low P response in aux1. Hence auxin transport from the root apex to differentiation zone promotes auxin-dependent hair response to low P. Low external P results in induction of root hair expressed auxin-inducible transcription factors ARF19, RSL2, and RSL4. Mutants lacking these genes disrupt the low P root hair response. We conclude auxin synthesis, transport and response pathway components play critical roles regulating this low P root adaptive response.
| Original language | English (US) |
|---|---|
| Article number | 1409 |
| Journal | Nature communications |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 1 2018 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Biochemistry, Genetics and Molecular Biology(all)
- Physics and Astronomy(all)
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A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate. / Bhosale, Rahul; Giri, Jitender; Pandey, Bipin K.; Giehl, Ricardo F.H.; Hartmann, Anja; Traini, Richard; Truskina, Jekaterina; Leftley, Nicola; Hanlon, Meredith; Swarup, Kamal; Rashed, Afaf; Voß, Ute; Alonso, Jose; Stepanova, Anna; Yun, Jeonga; Ljung, Karin; Brown, Kathleen M.; Lynch, Jonathan P.; Dolan, Liam; Vernoux, Teva; Bishopp, Anthony; Wells, Darren; Von Wirén, Nicolaus; Bennett, Malcolm J.; Swarup, Ranjan.
In: Nature communications, Vol. 9, No. 1, 1409, 01.12.2018.Research output: Contribution to journal › Article
TY - JOUR
T1 - A mechanistic framework for auxin dependent Arabidopsis root hair elongation to low external phosphate
AU - Bhosale, Rahul
AU - Giri, Jitender
AU - Pandey, Bipin K.
AU - Giehl, Ricardo F.H.
AU - Hartmann, Anja
AU - Traini, Richard
AU - Truskina, Jekaterina
AU - Leftley, Nicola
AU - Hanlon, Meredith
AU - Swarup, Kamal
AU - Rashed, Afaf
AU - Voß, Ute
AU - Alonso, Jose
AU - Stepanova, Anna
AU - Yun, Jeonga
AU - Ljung, Karin
AU - Brown, Kathleen M.
AU - Lynch, Jonathan P.
AU - Dolan, Liam
AU - Vernoux, Teva
AU - Bishopp, Anthony
AU - Wells, Darren
AU - Von Wirén, Nicolaus
AU - Bennett, Malcolm J.
AU - Swarup, Ranjan
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Phosphate (P) is an essential macronutrient for plant growth. Roots employ adaptive mechanisms to forage for P in soil. Root hair elongation is particularly important since P is immobile. Here we report that auxin plays a critical role promoting root hair growth in Arabidopsis in response to low external P. Mutants disrupting auxin synthesis (taa1) and transport (aux1) attenuate the low P root hair response. Conversely, targeting AUX1 expression in lateral root cap and epidermal cells rescues this low P response in aux1. Hence auxin transport from the root apex to differentiation zone promotes auxin-dependent hair response to low P. Low external P results in induction of root hair expressed auxin-inducible transcription factors ARF19, RSL2, and RSL4. Mutants lacking these genes disrupt the low P root hair response. We conclude auxin synthesis, transport and response pathway components play critical roles regulating this low P root adaptive response.
AB - Phosphate (P) is an essential macronutrient for plant growth. Roots employ adaptive mechanisms to forage for P in soil. Root hair elongation is particularly important since P is immobile. Here we report that auxin plays a critical role promoting root hair growth in Arabidopsis in response to low external P. Mutants disrupting auxin synthesis (taa1) and transport (aux1) attenuate the low P root hair response. Conversely, targeting AUX1 expression in lateral root cap and epidermal cells rescues this low P response in aux1. Hence auxin transport from the root apex to differentiation zone promotes auxin-dependent hair response to low P. Low external P results in induction of root hair expressed auxin-inducible transcription factors ARF19, RSL2, and RSL4. Mutants lacking these genes disrupt the low P root hair response. We conclude auxin synthesis, transport and response pathway components play critical roles regulating this low P root adaptive response.
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UR - http://www.scopus.com/inward/citedby.url?scp=85045517504&partnerID=8YFLogxK
U2 - 10.1038/s41467-018-03851-3
DO - 10.1038/s41467-018-03851-3
M3 - Article
C2 - 29651114
AN - SCOPUS:85045517504
VL - 9
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 1409
ER -