CU LTIVATION AND TECHNOLOGY Control of hormone regulation in potato plants with right Stress can seriously reduce the potato yield. Drought – as in the last growing season – may play a role, but there are several knowledge and resources factors that can be identified as causes. A stress reaction in the plant can be explained by the changing hormone regulation. This can be adjusted with the right knowledge and resources. Stoller, the American manufacturer of plant nutrients, It was export area manager Elodie Brans (r) who immediately took the trouble to travel from Spain to Riemst to hear the story about the problems with plant stress, says Guido Schriever. ‘I t is the hormone balance that ultimately determines the size, grade, yield and appearance of a plant. Not the fertiliser.’ This empirical experience and also the company slogan comes from the American plant physiologist Jerry Stoller. He is also the owner of the internationally-operating Stoller Group from Houston, Texas, which produces a whole range of plant nutrients. The plant scientist’s company hasn’t simply appeared out of nowhere. In the early 1960s, as a recent graduate scientist, Stoller immersed himself in the world of plant nutrition. The fact that hormones play an important role in the nutrition and growth of plants such as potatoes was already known in botany at that time. However, during his research work, 22 Potato World 2019 • number 1 Pagina 21
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