Fine‐tuning by strigolactones of root response to low phosphate. Issue 3 (26th February 2016)

• Record Type: Journal Article
• Authors: Kapulnik, Yoram; Koltai, Hinanit
• Is Part Of: Journal of integrative plant biology. Volume 58:Issue 3(2016)
• Page Start: 203
• Page End: 212
• Publication Date: 2016-02-26
• Subjects: Arabidopsis -- arbuscular mycorrhizal fungi -- phosphate -- root development -- strigolactones; Plants -- Periodicals; Plants -- China -- Periodicals; Electronic journals; 580.5
• DOI: 10.1111/jipb.12454
• Languages: English
• ISSNs: 1672-9072

Abstract

Abstract: Strigolactones are plant hormones that regulate the development of different plant parts. In the shoot, they regulate axillary bud outgrowth and in the root, root architecture and root‐hair length and density. Strigolactones are also involved with communication in the rhizosphere, including enhancement of hyphal branching of arbuscular mycorrhizal fungi. Here we present the role and activity of strigolactones under conditions of phosphate deprivation. Under these conditions, their levels of biosynthesis and exudation increase, leading to changes in shoot and root development. At least for the latter, these changes are likely to be associated with alterations in auxin transport and sensitivity. On the other hand, strigolactones may positively affect plant–mycorrhiza interactions and thereby promote phosphate acquisition by the plant. Strigolactones may be a way for plants to fine‐tune their growth pattern under phosphate deprivation. Abstract : Strigolactones and auxin are plant hormones that act in the plant to manipulate its response to phosphate conditions. Dependent on phosphate conditions, strigolactones manipulate auxin transport and perception whereas auxin positively regulates strigolactones biosynthesis. This crosstalk may affect lateral root formation, root hair density and elongation and activity of phosphate transporters.