Linked Life Data

19140934

Source:http://linkedlifedata.com/resource/pubmed/id/19140934

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2011-4-1
pubmed:abstractText
Here, we used phosphorus-32 (32P) labelling in compartmented pots combined with quantitative real-time polymerase chain reaction (PCR) analysis of phosphate(Pi) transporter gene expression to investigate regulation of Pi uptake pathways in barley (Hordeum vulgare), an arbuscular mycorrhizal (AM) plant that does not show strong positive growth responses to colonization.Barley was colonized well by Glomus intraradices and poorly by Glomus geosporum,but both fungi induced significant and similar growth depressions compared with non mycorrhizal controls. The lack of correlation between per cent colonization and extent of growth depression suggests that the latter is not related to carbon drain to the fungus. The contribution of the AM Pi uptake pathway for the two fungi was, in general,related to per cent colonization and expression of the AM-inducible Pi transporter gene, HvPT8, but not to plant responsiveness. Glomus intraradices contributed 48%of total plant P whereas G. geosporum contributed very little.The growth depression in plants where the AM uptake pathway was functional suggests that the contribution of the direct Pi uptake pathway via root hairs and epidermis was decreased. This decrease was not correlated with downregulation of the epidermal-expressed Pi transporter genes, HvPT1 and HvPT2. We hypothesize post-transcriptional or post-translational control of this transport process by AM colonization.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1469-8137
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
181
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
938-49
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Arbuscular mycorrhizal inhibition of growth in barley cannot be attributed to extent of colonization, fungal phosphorus uptake or effects on expression of plant phosphate transporter genes.
pubmed:affiliation
The University of Adelaide, Adelaide, SA 5005, Australia. emily.grace@adelaide.edu.au
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't