Simona Fabroni* and Paolo Rapisarda
Council for Agricultural Research and Economics (CREA), Research Center for Olive, Fruit and Citrus Crops, Acireale (CT), Italy
*Corresponding Author: Council for Agricultural Research and Economics (CREA), Research Center for Olive, Fruit and Citrus Crops, Acireale (CT), Italy.
Received: August 28, 2020; Published: September 30, 2020
Previous studies speculated on the existence of an inverse relationship between the available nitrogen and the accumulation of defense-related secondary metabolites in plants , as a consequence of C:N ratio unbalance. According to this hypothesis, the lower nitrogen contents of organically grown plants lead to a shift from the N-containing compounds to the production of carbon-rich defense-related phenylpropanoids. It has been also suggested that this behavior is putatively linked to the increased resilience to pest attacks and damage exerted by organic plants [2-4]. Recent research  showed that long-term organic fields have been associated with no consistent difference in nitrogen and carbon content, nor in C:N ratio, between the organic and conventional produces. In parallel, pest attacks were preferentially settled on conventional plants respect to organic ones. Organic management reduced insect population but no evidence about plant nutrient unbalance was directly linked with. The study demonstrated that organic soil management promoted salicylic acid build-up, which resulted in discouraging plant–insect interactions. Indeed, salicylic acid accumulation was not associated with lower nitrogen content of organic plants but it depended on alterations in soil microbial communities associated with long-term organic management. The study showed that over-presence of specific microbial groups induced plant resistance to pest attacks. By this way, it can be postulated that organic practices promotes plant resistance through derived changes in soil microflora.
Citation: Simona Fabroni and Paolo Rapisarda. “Is Plant Nitrogen Depletion Really Linked to the Biosynthesis of Carbon-Rich Defense-Related Compounds in Organic Products?". Acta Scientific Agriculture 4.10 (2020): 47-48.
Copyright: © 2020 Simona Fabroni and Paolo Rapisarda. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.