It turns out that different generas of plants require different
kinds of tissue culture. In other words, some plants are more troublesome than others. Here's a paper I came across while researching the origins of some pineapple guava varieties:
ScienceDirect - Scientia Horticulturae : Improvements in somatic embryogenesis protocol in Feijoa (Acca sellowiana (Berg) Burret): Induction, conversion and synthetic seeds
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