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Makorin RING zinc finger protein gene expresses during leaf vascular pattern development in rice (Oryza sativum L. var. Nipponbare)

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Author Affiliations

  • 1Laboratory of Molecular Cell Physiology, Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, JAPAN

Int. Res. J. Biological Sci., Volume 3, Issue (3), Pages 45-51, March,10 (2014)

Abstract

The molecular mechanisms of plant vascular tissues development havefascinated biologists for centuries. Vascular patterns in leaf are created de novo during development of each primordium and thus, it represents an attractive system to study the dynamics underlying pattern formation. Using non-radioactive in situ hybridization technique, we studied the makorin RING zinc finger protein gene (MKRN) expression pattern during embryonic and post-embryonic leaf vascular pattern development in rice (Oryza sativa L. var. Nipponbare). MKRN was ubiquitously expressed in shoot apical meristem and embryonic leaves in the embryo 10-11 and 15 days after pollination (DAP). In the embryo 15 DAP, expression of MKRN was concentrated in the developing provascular tissues whereas, it was gradually reduced in the surrounding mesophyll cells. It indicates that MKRN expression remains continuous in the cells of shoot apical meristem which later converted into provascular cells or procambium. During maturation of embryo 45 DAP, MKRN expression was restricted only to the developing provascular tissues and was found to be relatively reduced than the earlier growth stages of embryo. However, MKRN expression was again found to beincreased in the provascular bundle cellsof 1 dayimbibed embryo than in the dry mature embryo. This expression pattern was also found similar in coleoptile collected from imbibed seeds for six days. The expression pattern of MKRN was observed during the initiation of provascular cells, its differentiation, cell elongation, thus suggesting its important role in vascular pattern development in rice.

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