Ethylene inhibits rice root elongation in compacted soil via ABA- and auxin-mediated mechanisms

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Abstract: Soil compaction represents a major agronomic challenge, inhibiting root elongation and impacting crop yields. Roots use ethylene to sense soil compaction as the restricted air space causes this gaseous signal to accumulate around root tips. Ethylene inhibits root elongation and promotes radial expansion in compacted soil, but its mechanistic basis remains unclear. Here, we report that ethylene promotes abscisic acid (ABA) biosynthesis and cortical cell radial expansion. Rice mutants of ABA biosynthetic genes had attenuated cortical cell radial expansion in compacted soil, leading to better penetration. Soil compaction-induced ethylene also up-regulates the auxin biosynthesis gene OsYUC8. Mutants lacking OsYUC8 are better able to penetrate compacted soil. The auxin influx transporter OsAUX1 is also required to mobilize auxin from the root tip to the elongation zone during a root compaction response. Moreover, osaux1 mutants penetrate compacted soil better than the wild-type roots and do not exhibit cortical cell radial expansion. We conclude that ethylene uses auxin and ABA as downstream signals to modify rice root cell elongation and radial expansion, causing root tips to swell and reducing their ability to penetrate compacted soil

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch
Anmerkungen
ISSN: 1091-6490

Klassifikation
Biowissenschaften, Biologie

Ereignis
Veröffentlichung
(wo)
Freiburg
(wer)
Universität
(wann)
2024
Urheber
Huang, G.
Kilic, Azad
Karady, Michal
Zhang, Jiao
Mehra, Poonam
Song, Xiaoyun
Sturrock, Craig J.
Zhu, Wanwan
Qin, Hua
Hartman, Sjon
Schneider, Hannah M.
Bhosale, Rahul R.
Dodd, Ian C.
Sharp, Robert E.
Huang, Rongfeng
Mooney, Sacha
Liang, Wanqi
Bennett, Malcolm J.
Zhang, Dabing
Pandey, Bipin K.

DOI
10.1073/pnas.2201072119
URN
urn:nbn:de:bsz:25-freidok-2441567
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
14.08.2025, 10:59 MESZ

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Beteiligte

  • Huang, G.
  • Kilic, Azad
  • Karady, Michal
  • Zhang, Jiao
  • Mehra, Poonam
  • Song, Xiaoyun
  • Sturrock, Craig J.
  • Zhu, Wanwan
  • Qin, Hua
  • Hartman, Sjon
  • Schneider, Hannah M.
  • Bhosale, Rahul R.
  • Dodd, Ian C.
  • Sharp, Robert E.
  • Huang, Rongfeng
  • Mooney, Sacha
  • Liang, Wanqi
  • Bennett, Malcolm J.
  • Zhang, Dabing
  • Pandey, Bipin K.
  • Universität

Entstanden

  • 2024

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