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  • A simple method for the isolation of leaf epidermis from graminaceous species for studying stomatal physiology

    Brett, S; Ng, C;
    School of Biology and Environmental Science, UCD, O’Brien Centre for Science (West), University College Dublin, Dublin 4, Ireland
    Brachypodium distachyon_ has been gaining traction as the model annual species for economically important temperate grasses such as wheat and barley. Methods for tissue culture and genetic transformation have been developed for this model grass as a resource for functional genomics and reverse genetics. More recently, _B. distachyon_ has been used to elucidate the underlying mechanisms regulating stomatal development in monocotyledons. However, there is a paucity of methods for facilitating the use of _B. distachyon_ for studying stomatal physiology. We developed a simple and easy method for the isolation of intact leaf epidermis from _B. distachyon_ with minimal mesophyll contamination. Our results showed that stomatal guard cells remain viable in the isolated leaf epidermis and that stomata can open in the presence of potassium chloride and light, and that this opening response can be inhibited by abscisic acid in a dose-dependent manner. Additionally, we also showed that the method we have developed can be used for isolating leaf epidermis from a range of graminaceous species with minimal mesophyll contamination, including Triticum aestivum, T. macha, T. uratu, and T. aethiopicum, Hordeum vulgare, Avena sativa, and Aegilops tauschii.
    10.1007/s42976-021-00157-x

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