Abstract
Temperature modulates growth and development throughout the entire lifecycle of a plant. High temperature (HT) triggers the auxin biosynthesis-dependent growth in aerial tissues. On the other hand, the contribution of auxin to HT-induced root growth is currently under debate. Here we show that the putative intracellular auxin carrier PIN-LIKES 6 (PILS6) is a negative regulator of organ growth and that its abundance is highly sensitive to HT. PILS6 localizes to the endoplasmic reticulum and limits the nuclear availability of auxin, consequently reducing the auxin signaling output. HT represses the PILS6 protein abundance, which impacts on PILS6-dependent auxin signaling in roots and root expansion. Accordingly, we hypothesize that PILS6 is part of an alternative mechanism linking HT to auxin responses in roots.
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Claims 6
Claim · model-written summary
PILS6 negatively regulates organ growth.
Not reportedTaxon
Verbatim
e0“PILS6) is a negative regulator of organ growth”
Claim · model-written summary
PILS6 abundance is highly sensitive to high temperature.
Not reportedTaxonGeneDirection
Verbatim
e0“its abundance is highly sensitive to HT”
Claim · model-written summary
PILS6 localizes to the endoplasmic reticulum.
Not reportedTaxonDirection
Verbatim
e0“PILS6 localizes to the endoplasmic reticulum”
Claim · model-written summary
PILS6 limits nuclear auxin availability and thereby reduces auxin signaling output.
Not reportedTaxonGene
Verbatim
e0“limits the nuclear availability of auxin, consequently reducing the auxin signaling output”
Claim · model-written summary
High temperature represses PILS6 protein abundance.
Not reportedTaxon
Verbatim
e0“HT represses the PILS6 protein abundance”
Claim · model-written summary
High temperature affects PILS6-dependent root auxin signaling and root expansion.
Not reportedTaxonDirection
Verbatim
e0“impacts on PILS6-dependent auxin signaling in roots and root expansion”