Dry mass production and distribution of nutrients in two mango rootstocks as affected by salinity.
Dubey A. K., Manish Srivastav, Sharma Y. K., Pandey R. N., Deshmukh P. S.
Author Affiliation: Division of Fruits and Horticultural Technology, Indian Agricultural Research Institute, New Delhi 110 012, India.
Indian Journal of Horticulture 64 : 385-390
Abstract : The effect of salinization on two polyembryonic mango (Mangifera indica) rootstocks, i.e. Kurukkan and Olour, was studied by means of growth pattern and mineral nutrients accumulation. Both genotypes could survive 2.15 dS m-1 salinity level with mild necrosis and scorch on leaves. A negative linear relationship was found between fresh and dry weights of shoot and root and salt concentration. There were highly significant effects of salinity on tissue concentrations of Na+, K+, Ca2+ and Cl-. A significant negative correlation was observed between shoot and root dry matter yields and sodium content in leaves in both cultivars. Potassium concentration increased in stems and leaves of Olour with increasing salinity, and it showed a declining trend in Kurukkan. A significant positive correlation was noticed between shoot dry matter yields and calcium content in all parts of Olour. Kurukkan tissues had significantly more Ca2+ content and less Na+ content in leaf tissues compared to Olour at higher salt concentrations. This cultivar had significantly higher Na+ content in roots and higher contents of Cl- in roots, stems and leaves. In Olour, significantly higher Na+ content was found in leaf tissues at 4.23 dS m-1 salinity.