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Relationship between the Hormonal Balance and the Regulation of Iron Deficiency Stress Responses in Cucumber.
- Source :
-
Journal of the American Society for Horticultural Science . Nov2009, Vol. 134 Issue 6, p2-2. 1p. - Publication Year :
- 2009
-
Abstract
- Some studies suggest that iron (Fe) stress root responses are regulated by variations in specific plant hormones. However, this question remains unclear. A time-course experiment dealing with the relationship between the expression of the Fe-stress root responses at transcriptional (CsFRO1, CsIRT1, CsHA1, and CsHA2) and enzymatic levels [root Fe(III)-chelate reductase and plasma membrane H+-ATPase], and the variation of phytohormone concentrations in the shoot and root of Fe-starved plants have been studied in a Fe-efficient cucumber cultivar (Cucumis sativus L. cv. Ashley). The results indicate that the expression over time of the physiological Fe-stress root responses at transcriptional and enzyme activity levels are consistent with significant increases in indole-3-acetic acid root (transient) and shoot (sustained) concentrations. Fe-starvation also caused transient changes in the root concentration of abscisic acid and nitric oxide. Finally, an increase in root ethylene production and a decrease in the root concentration of some cytokinins were observed under Fe starvation, but they were not clearly timely coordinated with the expression of Fe physiological root responses. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00031062
- Volume :
- 134
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Journal of the American Society for Horticultural Science
- Publication Type :
- Periodical
- Accession number :
- 51897734
- Full Text :
- https://doi.org/10.21273/JASHS.134.6.589