MOMNJOH Edna KINDZEKA; TONJOCK Rosemary KINGE; YONG Cecile KUOMAI; NDOUMA MBONDJO Cécile; NTAFFOUO Victor Désiré;
INTRODUCTION: Soil salinity greatly limits plant productivity. This study was conducted to investigate the influence of arbuscular mycorrhizae on some metabolites, growth and agronomic parameters of (Pachyrhizus erosus) under salt stress.
METHODOLOGY: The plants were grown in a greenhouse and nourished with Wacquant nutrient solution of four concentrations (0, 50, 100 and 200 mM) of NaCl with five replications per concentration during six weeks. 20 g of arbuscular mycorrhizae were added for all concentrations. Weekly measurements of leaf area and stem height were obtained. Some metabolites (total soluble carbohydrates and proline) were analyzed in leaf samples. The farm was partition in to two treatments; control, 50 mM NaCl, NaCl + Biofertilizer and Biofertilizer only so as to evaluate the pod yield and harvest index.
RESULTS: Significant decrease (p < 0.001) of growth parameters were generally observed at 100 mM NaCl. Significant increase (p < 0.001) from 50 mM NaCl for some metabolites was observed. In the treatments with biofertilizers (AMF), great improvements were observed. In the farm, findings indicate that AMF positively influenced the agronomic parameters.
CONCLUSION: The main strategy in yam bean seems to increase osmotic adjustment through accumulation of some metabolites in the leaves. AMF inhibit the negative effect of salinity and can be encouraged for use to improved crop productivity and development of semi-arid, arid and coastal zones.
IMPACT OF THE STUDY: The AMF could be encouraged for use to improved crop productivity in in salty areas.
Keywords: Pachyrhizus erosus, salinity, some metabolites, growth, agronomic parameters