pH modulation of the environment by Stagonosporopsis cucurbitacearum, an important pathogen causing fruit rot in Cucurbitaceae

The Cucurbitaceae is a genetically diverse group of plants containing several important commodity crops in many parts the world such as cucumber, pumpkin and melon. In last decades, fruit rot caused by Stagonosporopsis spp. became major disease both field grown greenhouse cucurbits. Yield losses due to can show seasonal peaks up 30%. Despite its economic importance, only limited information available about growth characteristics cucurbitacearum. Our vitro studies with different media indicated an optimal rate fungus within range pH 5 6. Independent carbon source (sucrose, glucose, dextrose, fructose) alkalization 1–3, units was noticed under deprivation excess. observed modulation could not always be related more favourable environment. key factor influencing modulating capacity showed nitrogen source. Supplying nitrate, ammonium or combination both, environmental respectively increased, decreased remained stable. addition pH-elevating effect, nitrate supply also stimulated whilst on seriously affected. This research highlights importance regulation fungi adds our understanding S. cucurbitacearum pathogenicity.