Analysis of sulphur and chlorine induced DNA cytosine methylation alterations in fresh corn (Zea mays L. saccharata and rugosa) leaf tissues by methylation sensitive amplification polymorphism (MSAP) approach

Genes & Genomics
Tinashe ZendaHuijun Duan

Abstract

DNA (cytosine) methylation mechanism is another way through which plants respond to various cues including soil fertility amendments and abiotic stresses, and the mechanism has been used to infer some physiological, biochemical or adaptation processes. Despite numerous studies on global DNA methylation profiling in various crop species, however, researches on fresh corn (Zea mays L. saccharata or rugosa) remain largely unreported. The study aimed at investigating sulphur and chlorine induced DNA methylation changes in the fresh corn leaves of field-grown plants at the milk stage. Methylation sensitive amplification polymorphism (MSAP) technique was used to profile sulphur (S) and chlorine (Cl) induced DNA methylation patterns, levels and polymorphism alterations at the CCGG sites in fresh corn leaves of TDN21, JKN2000 and JKN928 hybrid cultivars. Twelve primer pairs used effectively detected 325 MSAP bands, exhibiting differentially methylated sites in the genomic DNA of all the three cultivars, with control showing higher (48.9-56.3%) type I bands as compared to sulphur (34.8-44.9%) and chlorine (40.9-47.4%) treatment samples. Consequently, total methylation levels were greater in S and Cl treatment samples than control; accou...Continue Reading

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