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Shoot-tips collected from stump shoots at the base of a 90-year-old Sequoia sempervirens and from the crown of the same donor tree were compared in respect of their organogenic performance in in vitro conditions. The cultures derived from stump shoots appeared to be much more responsive in terms of growth increment and adventitious rooting capacity — rooting rate, root length, average number of neoformed roots and root score — than cultures derived from the crown, although considerable variation was observed in all the organogenic criteria examined. The persisting topophysical differences in potential for in vitro organogenic and associated morphological traits characteristic of phase change were found to be connected with quantitative modifications of protein content. Thus, 23 membrane-associated proteins with molecular weights ranging from 22 to 58 kDa appeared to be synthesized in greater abundance in the culture originating from the stump shoots.

Influence of phase change within a 90-year-old Sequoia sempervirens on its in vitro organogenic capacity and protein patterns