STUDY OF α-DOX1 AND α-DOX2 GENES EXPRESSION FOLLOWING SOME STRESSES IN ROOTS OF THREE 
TOMATO GENOTYPES

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DEHDARI A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY Year:2007 | Volume:8 | Issue:1 Page(s): 31-42

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Title

STUDY OF α-DOX1 AND α-DOX2 GENES EXPRESSION FOLLOWING SOME STRESSES IN ROOTS OF THREE TOMATO GENOTYPES

Author(s)

DEHDARI A. | Issue Writer Certificate

Keywords

α-DIOXYGENASEQ3

GENE REGULATIONQ3

OXIDATIVE STRESSESQ3

TOMATOQ2

Abstract

The effects of some OXIDATIVE STRESSES specially drought and salinity stresses on regulation of a-dox1 and a-dox2 genes expression were investigated in TOMATO roots under greenhouse and hydroponic conditions. To asses the role of abscisic acid (ABA) and ethylene three genotypes including wild type ‘Ailsa Craig’ (‘AC’), the near isogenic ABA deficient Flacca (‘Flc’) strain and the ethylene receptor mutant Never ripe (‘Nr’) were used. Roots of stressed TOMATO plants were harvested and subjected to RNA extraction and RNA- hybridization with a-dox probes. The results showed that none of the stress treatments affected the regulation of a-dox2 gene expression. Salt (24 hr exposure of 170 mM NaCl) and drought (36 hr exposure) stresses upregulated a-dox1 expression in ‘Flc’ and AC roots. In roots of ‘Nr’ high level of a-dox1 expression was detected following salt treatment but, drought had no effect on its response. The greater upregulation of a-dox1 in ‘Flc’ roots is most likely due to an increase in ethylene levels in this genotype. In adult plants, different concentrations (0, 100, 170 and 300 mM NaCl) of salt treatments had no effect on a-dox expression in ‘AC’ and (‘Nr’ plants. However, over expression of a-dox1 was detected at 170 mM level in ‘Flc’ roots. Different times (6 hr, 1, 3 and 6 days) exposure of salt treatments was carried out on ‘AC’ and ‘Flc’ roots. Upregulation of was observed at 1 day exposure in both genotypes. Furthermore, overexpression of this gene was detected at 6 hr exposure only in ‘Flc’ roots. The results of greenhouse experiments showed that regulation of were depended on plant growth stages due to change in ethylene contents. The expression of a-dox1 was upregulated in roots of six week-old hydroponically grown ‘Flc’ plants following 24 hr exposure of 1 and 5 mM H2O2 treatments, However, upregulation in ‘AC’ plants was observed only at 5 mM H2O2 level. In the last experiment, was upregulated by wounding and salt (after 6 and 24 hr exposure) treatments as well as 1 and 5 mM H2O2 (after 24 hr exposure). The regulation of short length form of (a-dox1 5') in the all above mentioned experiments was the same as a-dox1 but, with much lower level upregulation. This study confirmed a potential role for a-dox1 in protecting roots of TOMATO plants from different kinds of OXIDATIVE STRESSES.

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APA: Copy

DEHDARI, A.. (2007). STUDY OF α-DOX₁ AND α-DOX₂ GENES EXPRESSION FOLLOWING SOME STRESSES IN ROOTS OF THREE TOMATO GENOTYPES. IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY, 8(1), 31-42. SID. https://sid.ir/paper/80815/en

Vancouver: Copy

DEHDARI A.. STUDY OF α-DOX₁ AND α-DOX₂ GENES EXPRESSION FOLLOWING SOME STRESSES IN ROOTS OF THREE TOMATO GENOTYPES. IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY[Internet]. 2007;8(1):31-42. Available from: https://sid.ir/paper/80815/en

IEEE: Copy

A. DEHDARI, “STUDY OF α-DOX₁ AND α-DOX₂ GENES EXPRESSION FOLLOWING SOME STRESSES IN ROOTS OF THREE TOMATO GENOTYPES,” IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY, vol. 8, no. 1, pp. 31–42, 2007, [Online]. Available: https://sid.ir/paper/80815/en

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