Islamabad: As Asif Ali Zardari prepared to take over the presidency for five years as the most powerful civilian president in the history of the country, Prime Minister Yousuf Raza Gilani said all institutions would now work with harmony free from any tussle.

Gilani said his first advice to the new president would be to address the parliament, something that former president Pervez Musharraf, who resigned August 18 under threat of impeachment, did not do because of "unruly" opponents.

The prime minister said he hoped that the PML-N would rejoin the coalition following the "landmark" presidential election marking the completion of transition to democracy.

PML-N chief spokesman Ahsan Iqbal and Secretary General Zafar Iqbal Jhagra extended congratulations to Zardari and vowed that the party would continue playing a positive role in the parliament despite sitting on the opposition benches.

Pointing out that PML-N had showed its clear majority without the PPP in the Punjab assembly, Iqal hoped that the mandate to govern the province would be respected.

Both PML-N central leaders said it was a matter of satisfaction and happiness for the nation that it now had a constitutionally elected head of state after nine years.

Commentators hoped Zardari would abide by his promises to trim the presidential powers including authority to dissolve assemblies that Musharraf had inserted into the constitution.