Cloning and Functional Analysis of MeHDS1 from Cassava Responsing Drought Evolution of MIR166 Gene Family in Land Plants Cloning and Functional Identification of the ATHB12 Gene of HD-Zip IFamily in Potato(Solanum tuberosum L.) HD-Zip III Transcription Factor and Cell Differentiation in Plants Micro-trichome as a class I homeodomain-leucine zipper gene regulates multicellular trichome development in Cucumis sativus