Contrasting phosphate acquisition of mycorrhizal fungi with that of root hairs using the root hairless barley mutant
By I. Jakobsen, Baodong Chen, Lisa Munkvold, T. Lundsgaard, Yong-guan Zhu. 2005
91 citations recorded by the source corpus.
Comparisons between plant species or cultivars differing in root hair length have indicated a major impact of root hairs on the mycorrhizal dependency of plants with respect to phosphate (P) uptake. The current study aimed to investigate this relationship by comparing directly the mycorrhizal dependency of a spontaneous root hairless mutant, brb, in Hordeum vulgare cv Pallas and its wild type. Both brb and wild type were grown at different soil P levels in association with different mycorrhizal fungi. P uptake of brb and wild type was similar at high P levels, but P uptake by non-mycorrhizal brb plants at low P levels was substantially lower than that of the non-mycorrhizal wild-type plants. However, P uptake of the mutant was much increased by mycorrhizas and with one fungus, the additional P uptake was effectively translated into increased plant growth. Roots of the mutant contained typical colonization structures and a radioactive tracer confirmed P transport by the extraradical mycelium. This is the first direct evaluation of the relative effectiveness of root hairs and mycorrhizas. Mycorrhizas effectively substituted root hairs in P uptake, whereas the additional P was most often used less effectively in promoting plant growth than P provided by root hairs.
Subfields: Plant Science
View Paper: https://www.semanticscholar.org/paper/d6c253688457e732a8f12a498e3d09c2a12700f3
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In Plant Science
- A. Richardson
- H. Lambers
- J. Barea
- F. Andrew Smith
- Sarah E. Smith
- Erik J. Veneklaas
- J. Lynch
- Richard J. Simpson
Citations in the corpus
- Arbuscular mycorrhizal networks: process and functions. A review (2010, background): “The fact that the AM fungal contribution to plant Pi uptake is greater in a root-hairless mutant than its wild type indicates that fine tuning of both uptake pathways is required to meet the needs of the plants for this important nutrient (Jakobsen et al., 2005).”
- Agricultural uses of plant biostimulants (2014, background): “The hyphae of AMF colonizing plants have some of the same functions as root hairs with respect to P acquisition (Jakobsen et al. 2005) and have an especially large influence on P uptake in varieties with short root hairs (Schweiger et al.”
- Acquisition of phosphorus and nitrogen in the rhizosphere and plant growth promotion by microorganisms (2009, background): “Further work to elucidate the role of microorganisms in influencing P availability within the rhizosphere and the extent to which they either complement or compete with plant processes in P acquisition is required (Jakobsen et al. 2005b).”
- Plant and microbial strategies to improve the phosphorus efficiency of agriculture (2011, background): “…mycorrhizal (AM) fungi fulfill some of the same functions as root hairs with respect to P acquisition in plant species colonised by AM fungi (e.g. Jakobsen et al. 2005b) and have an especially large influence on P uptake in varieties with short root hairs (e.g. Schweiger et al. 1995; Miguel…”
- Functional biology of plant phosphate uptake at root and mycorrhiza interfaces. (2007, background): “Accordingly, the root-hairless barley mutant, bald root barley (brb), was clearly more responsive to mycorrhization than the corresponding wild type ( Jakobsen et al., 2005).”