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Fibre length during shoot development. The term ‘immature’ refers to the young elongating shoot, whereas ‘mature’ refers to the fully elongated shoot. Each point represents the mean for 50 measurements. The internodes were counted from the base of the shoot upwards. Internodes 5, 4 and 3 of the immature shoot represent stage 3 of tissue development, whereas internode 2 of both shoots is at stage 4 of development. Bars indicate s.e.
