State Finance Minister D Jayakumar said such "politics of opportunism" will not succeed.
AIADMK-Amma led by Palaniswami accused the O Panneerselvam faction of "refusing" to come for talks.
The faction led by O Panneerselvam will be referred to as 'AIADMK Puratchi Thalaivi Amma' and the Sasikala faction will be referred to as 'AIADMK Amma'.
Panneerselvam's remark came a day after the two factions were squabbling and blaming each other for the delay in the talks getting off the ground.
Both OPS and EPS say positive results are expected soon.
A new political crisis is brewing in the VK Sasikala camp in Tamil Nadu -- differences between Chief Minister Edappadi Palaniswami and party general secretary Sasikala.
As the merger brought to an end weeks of suspense during which there was tough negotiations, the two factions said steps would be taken to expel party chief V K Sasikala.
A meeting presided over by Palaniswami said the appointment of Dinakaran as deputy general secretary was against party rules.
62 candidates vye for Amma's mantle in the Radhakrishnan Nagar assembly by-poll in Tamil Nadu, but who will fortune favour?
Most of the opposition parties blamed Rashtriya Swayamsevak Sangh-affiliates for the cow vigilantism.