. "Any process that activates or increases the frequency, rate or extent of filamentous growth of a population of unicellular organisms." . . . "positive regulation of filamentous growth of a population of unicellular organisms" . "activation of filamentous growth of a population of unicellular organisms" . "up regulation of filamentous growth of a population of unicellular organisms" . "up-regulation of filamentous growth of a population of unicellular organisms" . "upregulation of filamentous growth of a population of unicellular organisms" . . . .