It reduce the thorns in the lemon and it sourness. As sometime person have problem with the thorns during their management practices of lemon. Source: http://nif.org.in/innovation/grafting_in_lemon/128
The innovator developed this variety without thorns in 7 years and now developed 250 trees out of it. He making the cutting, mud and plastic bags are used. The farmer worked for making this, for seven years and now has 250 trees of it. The innovator did crossing and developed a variety which is seedless and without thorn. The innovator crossed "Bijora" (a dry fruit) flower and sowed the resulted hybrid seeds. The hybrid plant thus developed was seedless and has no thorns on its plant.
Link: Norml lemon plant has fruit has 8-10 seeds and its tree has many thorns. So the innovator did crossed lemon flowers with orange flowers, hybrid plant developed as seedless and sourness of lemon fruit away. Source: http://nif.org.in/innovation/grafting_in_lemon/128