What two fungal characteristics limit their growth and size?

What two fungal characteristics limit their growth and size?





I can think of very generic ones, such as nutrient availability or environmental conditions but I'm certain there are more specific answers I can give; something perhaps unique to fungi.|||they produce antibiotics to inhibit the others growth. Why they do that is just how they evolved, only god knows why but surely it did help them survive better. and they dont take in much energy nor they have not good system from energy like animal and plants, so they can't grow too big. they basically dont have like a system like body in normal state only makes mushrooms when they are reproducing. So thats why they dont grow in size it has no advantage for them in growing size unless when they become mushroom for better pore distribution, but thats just a part of their life cycle. and they dont have genes for creating complex organs so they dont grow in size just like bacteria there is never a bacteria as big as a cat|||Forces exerted by hyphae of the phytopathogen Pythium graminicola and mammalian pathogen Pythium insidiosum were compared with the mechanical resistance of their hosts鈥?tissues. Hyphal apices of both species exerted a mean force of 2 渭N, corresponding to mean pressures of 0.19 渭N 渭m鈭? (or MPa) for P. graminicola, and 0.14 渭N 渭m鈭? for P. insidiosum. Experiments with glass microprobes showed that the epidermis of grass roots resisted penetration until the pressure applied at the probe tip reached 1鈥?2 渭N 渭m鈭?. Previously published data show that mammalian skin offers even greater resistance (10鈥?7 渭N 渭m鈭?). Clearly, tissue strength exceeds the pressures exerted by hyphae of these pathogens, verifying that secreted enzymes must play a critical role in reducing the resistance of plant and animal tissues. It is presumed that hyphae are sufficiently powerful to bore through any obstacles remaining after enzyme action.