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Investigating the expression of some genes related to the production of apocarotenoids in the growth stages of stigma and tepal of cultivated saffron and two wild species

Document Type : Research Paper

Authors

1 Ph.D. Student of Plant Breeding, Department of Plant Production and Genetics, Faculty of Agriculture, University of Zanjan, Zanjan, Iran.

2 Associate Professor, Department of Plant Production and Genetics, Faculty of Agriculture, University of Zanjan, Zanjan, Iran

3 Associate Professor, Department of Plant College of Agriculture and Natural resources, University of Tehran, Karaj, Iran.

4 Assistant Professor, Department of Plant Production and Genetics, Faculty of Agriculture, University of Zanjan, Zanjan, Iran.

Abstract

Agricultural saffron Crocus sativus L. is a medicinal, widely used and expensive plant and has important effective substances: crocin, picrocrocin and safranal, which gives it the characteristics of color, taste and smell. The search for new sources producing the aforementioned apocarotenoids makes the importance of research on it more obvious day by day. Since the country of Iran has diploid wild species with characteristics close to the sterile triploid cultivated species, in the present research, two species of Caspian saffron C. caspius and Zeiba C. Speciosus, along with the cultivated species, were investigated and 6 genes active in the production of the three mentioned effective substances , CCD2, ALDH, PSY, LCY, BCH, UGT74 (and a housekeeping gene TUB as an internal control gene with constant expression in all tissues) in two flower tissues, stigma and perianth (tepal) and in five stages (time) of flowering including: The stages of bud formation (immature bud), bud ready to bloom, newly opened flower, mature flower and old flower were investigated. Using of Real Time PCR, the expression ratio (fold change) to the internal control gene (with logarithm based on 2) was investigated in different genes and different and sometimes similar expression patterns were observed with the gene expression in the cultivated species in both the stigma and stigma tissues. Based on the results obtained in this study and the increase or decrease in the expression of some genes involved in the pathways of apocarotenoids production, at the same time as the growth of the stages from the bud to the senescence stage of the flower, it is expected from the three aforementioned substances or from other apocarotenoids in the metabolom of flowers, cases have been found in the non-triploid species and create approaches for the commercial use of Iranian wild saffron species and pave the way for its commercialization.

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References
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Saffron Agronomy and Technology
Volume 11, Issue 1 - Serial Number 38
April 2023
Pages 71-85
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