MDC-T secretary general Tendai Biti on April 1 wrote to Ncube thanking him for the support in parliament but said their struggle for the democracy could be shortened if they worked together.
MDC had initially resolved to abstain from the election but decided to vote for Moyo after noting that Zanu PF was trying to use unorthodox means to help its chairman Simon Khaya Moyo to land the post.
“It goes without saying that the struggle for democracy in Zimbabwe will be a long and arduous journey,” Biti said. “However, it can be shortened if all democratic forces work together as we did on March 29 2011.”
Analysts last week said the tone of the one-page letter was a clear overture for the two formations, which split in 2005, to start unity talks.
The labour-based party split over whether to contest the 2005 senatorial elections or not.
But Regional Integration minister Priscilla Misihairabwi-Mushonga, who is the MDC secretary general, said they had not discussed the issue as a party.
“There are no talks,” she said. “The party has not discussed the issue.”
Misihairabwi-Mushonga could not say whether her party would entertain the talks, saying she was in a meeting.
Efforts to get a comment from Ncube were fruitless as he was said to be in the same meeting.
But sources said some senior officials in the MDC-T were not prepared for any form of talks as their positions would be threatened by such a development.
They said if the two parties united, there would be need to accommodate officials like Ncube and Misihairabwi-Mushonga in the new set-up.
Attempts to reunite the two factions ahead of the 2008 elections floundered at the last minute after some senior MDC-T officials expressed fears they would lose their posts.
Sources said there are plans by all political parties in the country to unite against Zanu PF in the next elections slated later this year. In previous polls, political parties contested elections as single entities, giving Zanu PF an advantage.