The problem is not new -- too many people in the world and not enough food. But an Israeli company called Reagenics aims to solve this problem by growing plant cells in bioreactors. The cells can be used for food products, dyes, vitamins and food additives. We all know that Israel is one of the centers of cultured meat, in which you can replicate stem cells of a cow," Dr. Michael Kagan, the CEO of Reagenics, told The Jerusalem Report in an interview.  "We do the same thing with plants. We take plant tissue and revert them to plant stem cells. We replicate the cells in liquid media in our bioreactors."                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             Unlike agriculture, bioreactors are not dependent on weather conditions or available land or political unrest. Another example is saffron. For thousands of years the main source of saffron has been Iran. The second largest is Kashmir in India, but climate change has wiped out most of Kashmir's ability to grow saffron, which has also been challenged by political unrest. As a result, saffron is the most expensive spice on the planet as it flowers only three weeks a year, and needs massive labor, mostly by children to pick the saffron threads. "We can grow saffron year round extremely cheaply," Kragan said.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Can this start-up scale up?  One of the challenges of many start-ups is making their proof of concept scalable, being able to produce the large quantities needed. Reagenics has already done that by building bioreactors in Nes Ziona, a pilot plant in the Golan Heights under construction. They are also workingo on an agreement to build a bioreactor in Denver, Colorado in the US. Overall, Reagenics says it can grow plant cells four times faster than in traditional agriculture and considerably cheaper.  The company is not working on food, but for other uses like cosmetics and food additives. "We have a dual platform, Kagan said. "We convert plants into plant stem cells and our second platform is the bioreactors. They are specially built to grow these plant stem cells."  In fact, Kagan says, meat culture companies are comong to them for advice on how to scale up.