Nutrient uptake and growth of in vitro coconut (Cocos nucifera L.) calluses

Histological study of somatic embryogenesis induction on zygotic embryos of macaw palm (Acrocomia aculeata (Jacq.) Lodd. ex Martius)

“…This process of embryo formation is similar to the one described by Tisserat and DeMason (1980); where somatic embryos of Phoenix dactylifera originated from nodular callus of meristematic nature. Dussert et al (1995) described a similar event for Cocos nucifera, where globular structures appeared as the result of mersitematic zones fragmentation. In Elaeis guineensis (Schwendiman et al 1988) and in Euterpe edulis (Guerra and Handro 1998) the induction of nodular calli after the multiplication of perivascular cells was observed, but only when leaf explants were used.…”

“…The formation of embryos of multi or unicellular origin of macaw palm was related to the culture medium conditions. Dussert et al (1995) also described that different conditions of culture medium lead to two different pathways of somatic embryo formation in Cocos nucifera, but in this case, an increase in auxin content lead to the development of unicellular-origin somatic embryos. Also, numerous macaw palm proembryos developed from cells of the fundamental meristem of the explant cotyledonary region, especially until the day 40 of culture.…”

Application of bioreactor systems for large scale production of horticultural and medicinal plants

“…pH Changes in pH during culture have been reported by several authors (Dussert et al, 1995;Hilton and Wilson, 1995;Yu et al, 2000;Lian et al, 2002b). These changes appeared to be related to the balance between ammonium in the medium -as shown by several authors (Hilton and Wilson, 1995;Escalona et al, 1999;Lian et al, 2002b).…”

Callogenesis and rhizogenesis in date palm leaf segments: are there similarities between the two auxin-induced pathways?

“…Such a cell is similar to the cell-type composing the calluses reported by Nyman et al (1983). Curiously, reactivated cells located within the calluses are similar to embryogenic reactivated cells previously described in chicory (Dubois et al 1991), sunflower (Laparra et al 1997), a woody species such as oak (Puigderrajols et al 2001), monocotyledonous plants such as bamboo (Ramanayake and Wanniarachchi 2002) and coconut palm (Verdeil et al 1994;Dussert et al 1995). In RIM, this ''star-shape'' stage seems more transient than in CIM condition and is not systematically present, the celldetermination process is later characterised by a meristematic-like shape.…”