The Turkish opposition have ‘questioned the honor’ of President Recep Tayyip Erdogan after  the leader admitted accepting a luxury jumbo jet as a “gift” from Qatar.Erdogan has come under intense pressure after it emerged he had received the $400 million jet from Doha. The opposition initially claimed the plane had been bought for the presidency with public funds.On Monday, Erdogan said Turkey had shown interest in buying the Boeing 747-8 plane but Emir Sheikh Tamim bin Hamad Al-Thani insisted on offering the plane as a gift.The plane shows the increasingly close relationship between Doha and Ankara, particularly since Saudi Arabia and Arab countries launched a boycott more than a year ago of Qatar over its links to extremist groups. Doha looked to Turkey and Iran in response to ship in food, goods and supplies. Qatar and Turkey also sided with Islamist groups during the Arab Spring protests in country’s like Egypt and Libya.Last month, Doha promised to make a $15 billion direct investment in Turkey after a spat  with Washington, which saw the lira’s value fall drastically against the dollar.