Effect of Plant Metabolism and Fertilizer Type in the Production of Root Exudates Under the Influence of Root Mechanical Stress

Abstract

The current study was carried out in order to know the effect of plant metabolism, fertilizer type and michanical stress (soil compaction) factors on the content of root exudates of mungbean plant Vigna radiate L. and maize plant Zea mays L. from primary and secondary metabolites. Root exudates were collected and their contents of metabolites such as total sugars, total proteins, total phenols, total flavonoids total terpenoids, Hormons (gibberellic, abscisic and jasmonic acid), and enzymes (ATPase, catalase and DNase) were estimated using spectrophotometric and HPLC technology, and the results showed the following: (1) Significant superiority in the content of root exudates of maize plants (C4) from all metabolites except for total sugars and gibberellin hormone where their concentration decreased significantly Compared to the root exudates of mungbean plants (C3). (2) Significant superiority in the content of root exudates of plants grown in compacted soils from all metabolites except for gibberellin hormone and DNase, where theirconcentration decreased significantly compared to noncompacted soils. (3) Significant decrease in the concentration of most of the Components of the root exudates of mungbean and maize plants affected by different types of studid fertilizers from metabolites compared to the root exudates of plants not affected by those fertilizers. The complete randomized block design (RCBD) was adopted with a factorial experiment with three factors, namely metabolism (C), fertilizer (F) and mechanical stress (S), and with three replications, and averages of the trasactions were compared using the least significant difference (RLSD) test at the probability level 0.05.