| Studies on sodium bypass flow in lateral rootless mutants lrt1 and lrt2, and crown rootless mutant crl1 of rice (Oryza sativa L.). | |
| | |
MedLine Citation:
|
PMID: 19930131 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
An apoplastic pathway, the so-called bypass flow, is important for Na+ uptake in rice (Oryza sativa L.) under saline conditions; however, the precise site of entry is not yet known. We report the results of our test of the hypothesis that bypass flow of Na+ in rice occurs at the site where lateral roots emerge from the main roots. We investigated Na+ uptake and bypass flow in lateral rootless mutants (lrt1, lrt2), a crown rootless mutant (crl1), their wild types (Oochikara, Nipponbare and Taichung 65, respectively) and in seedlings of rice cv. IR36. The results showed that shoot Na+ concentration in lrt1, lrt2 and crl1 was lower (by 20-23%) than that of their wild types. In contrast, the bypass flow quantified using trisodium-8-hydroxy-1,3,6-pyrenetrisulphonic acid (PTS) was significantly increased in the mutants, from an average of 1.1% in the wild types to 3.2% in the mutants. Similarly, bypass flow in shoots of IR36 where the number of lateral and crown roots had been reduced through physical and hormonal manipulations was dramatically increased (from 5.6 to 12.5%) as compared to the controls. The results suggest that the path of bypass flow in rice is not at the sites of lateral root emergence. |
| | |
Authors:
|
Bualuang Faiyue; Chenniappan Vijayalakshmi; Shafqat Nawaz; Yasuo Nagato; Shin Taketa; Masahiko Ichii; Mohammed J Al-Azzawi; Timothy J Flowers |
Publication Detail:
|
Type: Journal Article Date: 2009-11-17 |
Journal Detail:
|
Title: Plant, cell & environment Volume: 33 ISSN: 1365-3040 ISO Abbreviation: Plant Cell Environ. Publication Date: 2010 May |
Date Detail:
|
Created Date: 2010-06-03 Completed Date: 2010-08-18 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9309004 Medline TA: Plant Cell Environ Country: United States |
Other Details:
|
Languages: eng Pagination: 687-701 Citation Subset: IM |
Affiliation:
|
Department of Biology and Environmental Science, School of Life Sciences, University of Sussex, Brighton BN19QG, UK. B.Faiyue@sussex.ac.uk |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Biological Transport Mutation Oryza sativa / genetics, physiology* Phloem / chemistry Plant Roots / anatomy & histology* Plant Shoots / metabolism, physiology Plant Transpiration Pyrenes / metabolism Seedling / anatomy & histology, physiology Sodium / metabolism*, physiology Sulfonic Acids / metabolism |
| Chemical | |
Reg. No./Substance:
|
0/8-hydroxy-1,3,6-pyrenetrisulfonic acid; 0/Pyrenes; 0/Sulfonic Acids; 7440-23-5/Sodium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The role of lateral roots in bypass flow in rice (Oryza sativa L.).
Next Document: Chromatin regulation functions in plant abiotic stress responses.