Abscisic acid promotes auxin biosynthesis to inhibit primary root elongation in rice.

ABSTRACT: Soil compaction is a global problem causing inadequate rooting and poor yield in crops. Accumulating evidence indicates that phytohormones coordinately regulate root growth via regulating specific growth processes in distinct tissues. However, how abscisic acid (ABA) signaling translates into auxin production to control root growth during adaptation to different soil environments is still unclear. In this study, we report that ABA has biphasic effects on primary root growth in rice (Oryza sativa) through an auxin biosynthesis-mediated process, causing suppression of root elongation and promotion of root swelling in response to soil compaction. We found that ABA treatment induced the expression of auxin biosynthesis genes and auxin accumulation in roots. Conversely, blocking auxin biosynthe

SUBMITTER: Qin H 

PROVIDER: S-EPMC10022642 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature