Auxin Transport is Sufficient to generate a Maximum and Gradient Guiding Root Growth  

Oleh:

Grieneisen, Veronica A. ; Jian, Xu ; Maree, Athanasius F.M. ; Hogeweg, Paulien ; Scheres, Ben

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: NATURE (keterangan: ada di Proquest) vol. 449 no. 7165 (Oct. 2007), page 1008.

Ketersediaan

Perpustakaan FK Nomor Panggil: N01.K.2007.09 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

The plant growth regulator auxin controls cell identity, cell division and cell expansion. auxin efflux facilitatiors(PINs) are associated with auxin maxima in distal regions of both shoots and roots. Here we model diffusion and PIN-facilitated auxin transport in and asross cells within a structured root layout. In our model, the stable accumulation of auxin in a distal maximum emerges from the auxin flux pattern. We have experimentally tested model predictions of robustness and self organization. Our model explains pattern formation and morphogenesis at timescale from seconds to weeks, and can be understood by conceptualizing the root as an 'auxin capacitor'. A robust auxin gradient associated with the maximum, in combination with separeble roles of auxin in cell division and cell expansion, is able to explain the formation, maintenance and growth of sharply bounded meristematic and elongation zones. Directional permeability and diffusion can fully account for stable auxin maxima and gradients that can instruct morphogenesis.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali