Growth processes carrots

Surette MA, Sturz AV, Lada RR, Nowak J. Bacterial endophytes in processing carrots (Daucus carota L. var. sativus) Their localization, population density, biodiversity and their effects on plant growth. Plant Soil 2003 253 381-390. 

The parameters, mentioned however, have not been clearly interpreted in terms of quality, i.e. what aspect of quality is measured The IQC provides a framework for further investigations to demonstrate the meaning of these parameters. In the apple and carrot experiments of the Louis Bolk Instituut, we demonstrated some experimental parameters in food products grown with different balances between growth and differentiation. Biocrystallisation pictures in particular, are able to show both the life processes of growth and differentiation, and their integration. In future we expect to find the key to work out the relevance of coherence for health in the balance (the integration) between the life processes. 

To this end, we designed experiments in which conditions were varied in order to induce the extremes of growth or differentiation into the crop. In Table 5.4 we present an overview of the experiments with the presumed effects of varying the cultivation factors on the life processes. By comparing the results with our expectations, we largely completed step 4 of the validation course for apple and carrot. 

These developments have certainly changed our concepts of lAA biogenesis from what we knew only a few years ago. It is important to remember, however, that while the establishment of the existence of a non-tryptophan pathway to lAA shows that there is more than one biosynthetic path to lAA, we still know very little about which pathway a plant uses for specific physiological processes or why one pathway is used and not the other. We do know that in the bean seedling, lAA biosynthesis begins even before the stored conjugates are depleted [51] and this biosynthesis comes primarily from tryptophan conversion. Likewise, in carrot callus tissue, the conversion of tryptophan to lAA is also the predominant route [43]. However, when carrot cells are induced to form embryos by growth on 2,4-D-free medium, the conversion of tryptophan to lAA decreases and the non-tryptophan pathway predominates. Interactions between these pathways and the role each plays in development remain to be determined. 

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