State Fisheries Minister and senior AIADMK leader D Jayakumar told reporters that as many as 111 MLAs reposed their faith in the chief minister at the meeting.
The development is being considered as a boost to Mr Palaniswami, whose earlier meeting on August 28 reportedly witnessed a much less attendance with some claiming that only 75 MLAs were present at it.
Mr Jayakumar said the MLAs had "wholeheartedly extended their full cooperation" to the chief minister and an unanimous resolution was adopted reposing faith in his leadership.
He also claimed that nine MLAs of the Dhinakaran camp had contacted Mr Palaniswami over the phone and extended their support to him. Also, three MLAs who are allies of the ruling party had promised their support to Mr Palaniswami, he added.
The Peravurani MLA had intimated that he would not be able to attend the meet as he was indisposed, Mr Jayakumar said.
He alleged that some legislators had been "illegally confined against their wishes" (at Puducherry) and asserted that the meet signalled the dashing of hopes of those who wanted to "thrust" an election on the people.
The AIADMK has 134 MLAs in the 234-member state Assembly with one vacancy.