Effect of bioregulators and moisture stress on dry matter accumulation and its partitioning in mustard

A field study was conducted during the two consecutive Rabi seasons 2001–02 & 2002–03 to study the role of bioregulators and moisture stress on partitioning of biomass in Brassica juncea. Results revealed that three irrigations (no stress) at BI + 50% flowering + 50% pod development accumulated significantly higher total dry matter per plant over no irrigation (crop under stressed) at physiological maturity. In terms of dry matter partitioning, significantly higher dry matter was allocated to pods under three irrigations. Brassinosteroid (foliar) caused accumulation of maximum total dry matter as compared to rest of the treatments at physiological maturity. Thiourea application (S+F) affected the allocation of dry matter to various organs by translocating of biomass from stem to pods significantly as the pod weight was highest and 62.5 % more compared to control at physiological maturity.