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      Primary Root Excision Induces ERF071, Which Mediates the Development of Lateral Roots in Makapuno Coconut (Cocos nucifera).

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          Abstract

          Coconut (Cocos nucifera L.) is widely recognized as one of nature's most beneficial plants. Makapuno, a special type of coconut with a soft, jelly-like endosperm, is a high-value commercial coconut and an expensive delicacy with a high cost of planting material. The embryo rescue technique is a very useful tool to support mass propagation of makapuno coconut. Nevertheless, transplanting the seedlings is a challenge due to poor root development, which results in the inability of the plant to acclimatize. In this study, primary root excision was used in makapuno to observe the effects of primary root excision on lateral root development. The overall results showed that seedlings with roots excised had a significantly higher number of lateral roots, and shoot length also increased significantly. Using de novo transcriptome assembly and differential gene expression analysis, we identified 512 differentially expressed genes in the excised and intact root samples. ERF071, encoding an ethylene-responsive transcription factor, was identified as a highly expressed gene in excised roots compared to intact roots, and was considered a candidate gene associated with lateral root formation induced by root excision in makapuno coconut. This study provides insight into the mechanism and candidate genes involved in the development of lateral roots in coconut, which may be useful for the future breeding and mass propagation of makapuno coconut through tissue culture.

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          Author and article information

          Journal
          Plants (Basel)
          Plants (Basel, Switzerland)
          MDPI AG
          2223-7747
          2223-7747
          Dec 26 2022
          : 12
          : 1
          Affiliations
          [1 ] Rice Science and Innovation Center, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand.
          [2 ] Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand.
          [3 ] Central Laboratory and Greenhouse Complex, Research and Academic Services Center, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand.
          [4 ] National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand.
          Article
          plants12010105
          10.3390/plants12010105
          9823405
          36616233
          37f42f15-f1e4-4c96-a00c-3c407a21a5e4
          History

          root development,transcriptome,ERF071,RNA-seq,embryo rescue,ethylene responsive factor,makapuno coconut,root excision

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