By CIARAN GILESMADRID (AP) â¿¿ The Spanish government is deeply concerned about the fact that one of the king's daughters has been named as a suspect in a corruption case, the foreign minister said Thursday. Minister Jose Manuel Garcia Margallo said the summoning of Princess Cristina affected the entire country's image and urged that the case be resolved rapidly. "Anything that affects an institution that has been so important in Spain's transition (from dictatorship to democracy) and which is so important for Spain's image abroad, causes enormous concern," Margallo told reporters. The subpoena announcement caused a sensation Wednesday and has been the main news item for all Spanish media. The summons is a first for a member of the king's immediate family. The palace expressed surprise at the decision and welcomed a prosecutor's move to appeal it. The 47-year-old princess, the youngest daughter of King Juan Carlos, has not been charged but must appear for questioning by Palma de Mallorca Judge Jose Castro on April 27. The investigation centers on whether her husband Inaki Urdangarin and his former business partner funneled about 5 million euros ($6.4 million) in public funds via the nonprofit Noos Institute they ran into private businesses they controlled. "It's imperative that the judiciary should get to the bottom of the Noos case, not just because it's a serious case of corruption but rather because it's a scandal that is causing considerable damage to the prestige of the monarchy," the leading newspaper El Pais wrote Thursday in an editorial. The royal family's troubles and corruption scandals affecting the country's two main political parties have greatly irked Spaniards, who are suffering through an economic crisis that has sent unemployment soaring to 26 percent. Previously both the judge and the prosecutor had agreed there was not enough cause to call the princess in for questioning but the magistrate said new information had changed his mind.