Monocoty ledon

In the quest to find other plants that are suitable as bioreactors, various monocoty-ledonous and dicotyledonous species have been tested. These include corn [16], rice and wheat [17], alfalfa [18], potato [19, 20], oilseed rape [21], pea [22], tomato [23] and soybean [24]. The major advantage of cereal crops is that recombinant proteins can be directed to accumulate in seeds, which are evolutionar specialized for storage and thus protect proteins from proteolytic degradation. Recombinant proteins are reported to remain stable in seeds for up to five months at room temperature [17] and for at least three years at refrigerator temperature without significant loss of activity [25]. In addition, the seed proteome is less complex than the leaf proteome, which makes purification quicker and more economical [26]. 

Over longer periods of time, such xylem-mobile compounds will move increasingly to the leaf margins. If the compound is applied as a point source on the leaf of a dicotyledonous plant, a wedge-shaped distribution pattern (the apoplastic wedge ) is usually observed" in monocoty-ledonous plants, accumulation occurs at the leaf tips, often to high concentrations. 

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