Since the discovery in its cell walls of mixed-linkage glucans previously only found in Poales, Equisetum has received a lot of attention. Leroux et al. show that the carinal canals in E. ramosissimum have a distinctive lining containing pectic homogalacturonan, cellulose, xyloglucan and extensin. They propose that these canals function as water-conducting channels and that extensins play important roles in their development and/or function.
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