sentence: In endophytes it has been shown that – despite the lack of explicit infection symptoms – the presence of a second organism within the host and their mutual interaction can lead to distinct changes in the physiology , morphology and growth of the host plant ( Latchs & Christensen , 1985 ; Varma et al ., 1999 ; Olejniczak & Lembicz , 2007 ; Dupont et al ., 2015 ; Larriba et al ., 2015 ; Rozpadek et al ., 2015 ) .