Assessment of the vacuolar Na+/H+ antiporter (NHX1) transcriptional changes in Leptochloa fusca L. in response to salt and cadmium stresses

被引:2
|
作者
Adabnejad, Hamed [1 ]
Kavousi, Hamid Reza [1 ]
Hamidi, Hadi [1 ]
Tavassolian, Iraj [2 ]
机构
[1] Shahid Bahonar Univ Kerman, Fac Agr, Dept Biotechnol, Kerman, Iran
[2] Shahid Bahonar Univ Kerman, Fac Agr, Dept Hort, Kerman, Iran
关键词
Kallar grass; Salt stress; Cadmium; NHX1; Semi-quantitative RT-PCR;
D O I
暂无
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Sodium/ proton exchangers (NHX) are key players in plant responses to salinity and have a central role in establishing ion homeostasis. NHXs can be localized in tonoplast or plasma membranes, where they exchange sodium ions for protons, resulting in the removal of ions from the cytosol into vacuole or extracellular spaces. In the present study, the expression pattern of the gene encoding Na+/H+ antiporter in the vacuolar membrane (NHX1 gene) in Leptochloa fusca (Kallar grass) was measured by a semi-quantitative RT-PCR method under different treatments of NaCl and CdCl2. Results indicated that NaCl positively affected expression levels of LfNHX1, and that the amount of LfNHX1 mRNA increased in conjunction with the rise of salinity pressure, This finding suggests that vacuolar Na+/H+ antiporter might play an important role in the salt tolerance ability of kallar grass. The results also showed that cadmium exposure significantly modulated the mRNA expression of the LfNHX1 gene, suggesting that cadmium exposure disturbed Na+ homeostasis across the tonoplast and decreased the salt tolerance ability of kallar grass.
引用
收藏
页码:133 / 142
页数:10
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