FERRIC CHELATE REDUCTASE ACTIVITY IN AZALEA UNDER IRON DEFICIENCY STRESS
Abstract
Iron deficiency is a common issue affecting plant growth, particularly in calciferous soils where the availability of iron is limited. Azalea, a plant known for its ornamental value, is highly susceptible to iron deficiency, which manifests as chlorosis and reduced vigor. This study investigates the role of ferric chelate reductase (FCR) activity in Azalea under conditions of iron deficiency stress. FCR is a key enzyme involved in the reduction of Fe(III) to the more plant-available Fe(II), a critical step in iron uptake.
In this study, Azalea plants were subjected to iron-deficient conditions to assess the changes in FCR activity over time. The results demonstrated a significant increase in FCR activity in the roots of iron-deficient Azaleas compared to those grown under iron-sufficient conditions. This upregulation of FCR suggests a compensatory mechanism by which Azalea enhances iron acquisition under stress. Furthermore, the study explores the correlation between FCR activity and physiological indicators of iron deficiency, such as chlorophyll content and plant growth parameters. The findings highlight the importance of FCR activity as a potential biomarker for assessing iron deficiency in Azalea. Understanding the enzymatic responses of Azalea to iron deficiency stress can aid in developing strategies to mitigate the adverse effects of nutrient deficiencies, improving plant health and ornamental quality.
Keywords
Ferric chelate reductase, Azalea, iron deficiencyHow to Cite
References
AIPH (International Association of Horticultural Producers) and Union Fleur (2013). International
Statistics – Flowers and Plants 2013. Vol. 61. Zentrum für Betriebswirtschaft im Gartenbau e.V. an der Leibniz Universität Hannover, Germany.
Albano JP, Miller WB (1996). Iron deficiency stress influences physiology of iron acquisition in marigold (Tagetes erecta L.). J. Am. Soc. Hortic. Sci. 121:438–441.
Campbell SA, Nishio JN (2000). Iron deficiency studies of sugar beet using an improved sodium bicarbonate‐buffered hydroponic growth system. J.Plant Nutr. 23: 741–757.
Chaanin A, Preil W (1994). Influence of bicarbonate on iron deficiency chlorosis in Rhododendron. Acta Hort.364:71–78.
De La Guardia MD, Alcántara E (2002). A comparison of ferric-chelate reductase and chlorophyll and growth ratios as indices of selection of quince, pear and olive genotypes under iron deficiency stress. Plant Soil 241:49–56.
Demasi S, Caser M, Kobayashi N, Kurashige Y, Scariot V (2015). Hydroponic screening for iron deficiency tolerance in evergreen azaleas. Not. Bot. Horti. Agrobo.43(1): 210-213.
Galle FC (1987). Azaleas. Timber Press, Portland, OR,USA.
Gogorcena Y, Abadía J, Abadía A (2005). A new technique for screening iron-efficient genotypes in peach rootstocks: elicitation of root ferric chelatereductase by manipulation of external iron concentrations. J. Plant Nutr. 27:1701–1715.
Hansen NC, Hopkins BG, Ellsworth JW, Jolley VD (2007). Iron nutrition in field crops. In: Barton LL, Abadía J (eds) Iron nutrition in plants and rhizospheric microorganisms. Springer, Dordrecht, The Netherland, pp. 23–59.
Jolley VD, Cook KA, Hansen NC, Stevens WB (1996). Plant physiological responses for genotypic evaluation of iron efficiency in Strategy I and Strategy II plants: A review. J. Plant Nutr. 19:1241–1255.
Kobayashi N, Scariot V (2008). Selection of lime-tolerant azaleas based on seed germination responses to pH regimes. In: Modern variety breeding for present and future needs. Proceedings of the 18th EUCARPIA general congress, Valencia, Spain, 9-12 September. Editorial Universidad Politécnica de Valencia.
Kofranek AM, Lunt OR (1975). Mineral nutrition. In:Growing azaleas commercially. Kofranek AM, Larson RA (eds) Division of Agricultural Sciences, University of California, Davis, California, USA, pp. 36–46.
Marschner H (1995). Mineral nutrition of higher plants. Academic Press, Cambridge, U.K.
Marschner H, Römheld V, Kissel M (1986). Different strategies in higher plants in mobilization and uptake of iron. J. Plant Nutr. 9:3–7.
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