Carbon Fluxes between Primary Metabolism and Phenolic Pathway in Plant Tissues under Stress

International Journal of Molecular Sciences

Sofia Caretto³  Vito Linsalata²  Giovanni Colella³  Giovanni Mita³  Vincenzo Lattanzio¹ 

[1] Department of Sciences of Agriculture, Food and Environment, University of Foggia, Via Napoli 25, 71100 Foggia, ItalyInstitute of Sciences of Food Production, National Research Council, Via Amendola, 122/O, 70126 Bari, Italy;Institute of Sciences of Food Production, National Research Council, Via Provinciale Lecce-Monteroni, 73100 Lecce, Italy;

关键词: environmental stresses;    phenolics;    resistance costs;    trade-offs;    proline;    transduction pathway;   

DOI  :  10.3390/ijms161125967

来源: mdpi

【 摘 要 】

Higher plants synthesize an amazing diversity of phenolic secondary metabolites. Phenolics are defined secondary metabolites or natural products because, originally, they were considered not essential for plant growth and development. Plant phenolics, like other natural compounds, provide the plant with specific adaptations to changing environmental conditions and, therefore, they are essential for plant defense mechanisms. Plant defensive traits are costly for plants due to the energy drain from growth toward defensive metabolite production. Being limited with environmental resources, plants have to decide how allocate these resources to various competing functions. This decision brings about trade-offs, i.e., promoting some functions by neglecting others as an inverse relationship. Many studies have been carried out in order to link an evaluation of plant performance (in terms of growth rate) with levels of defense-related metabolites. Available results suggest that environmental stresses and stress-induced phenolics could be linked by a transduction pathway that involves: (i) the proline redox cycle; (ii) the stimulated oxidative pentose phosphate pathway; and, in turn, (iii) the reduced growth of plant tissues.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.