41. The presence of water is important because the zoospores have no way to reach a host without swimming. 42. The zoospores make toxins that are shed into the water, basically drugging the fish and making them lethargic, 43. The sporangia ripen and release zoospores , which infect plant roots by entering the root behind the root tip. 44. Once zoospores reach the root or seed, they encyst, germinate, and infect via a germ tube. 45. On the other hand, encysted zoospores of P . colocasiae can survive for several months without a host. 46. "It can transform from an amoeba to a toxic zoospore in two minutes, " she said. 47. It contains a larger population of bacteria, particularly the cellulolytic bacteria, lower protozoa, and higher fungi zoospores . 48. Upon release from the germinated resting spore, zoospores seek out a suitable substrate for growth using chemotaxis or phototaxis. 49. The fungus zoospores can survive within a temperature range of 4 25 �C and a pH range of 6 7. 50. Chemicals such as deadzeins and genistein are released at the tip of the plant roots which attract the liberated zoospores .
