Parallel auxin transport via PINs and plasmodesmata during the Arabidopsis leaf hyponasty response.

ABSTRACT:

Key message

The leaf hyponasty response depends on tip-to-petiole auxin transport. This transport can happen through two parallel pathways: active trans-membrane transport mediated by PIN proteins and passive diffusion through plasmodesmata. A plant's ability to counteract potential shading by neighboring plants depends on transport of the hormone auxin. Neighbor sensing at the leaf tip triggers auxin production. Once this auxin reaches the abaxial petiole epidermis, it causes cell elongation, which leads to leaf hyponasty. Two pathways are known to contribute to this intercellular tip-to-petiole auxin movement: (i) transport facilitated by plasma membrane-localized PIN auxin transporters and (ii) diffusion enabled by plasmodesmata. We tested if these two modes of transport are arr

SUBMITTER: Li J 

PROVIDER: S-EPMC10733227 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature