▁really ▁low , ▁the ▁plant ▁depend ▁mainly ▁in ▁the ▁AM ▁fung i ▁to ▁ful fill ▁its ▁ph osph ate ▁dem ands . ▁Studies ▁with ▁tom ato ▁plants ▁have ▁shown ▁that , ▁when ▁plants ▁under go ▁a ▁def ic it ▁in ▁ph osph ate , ▁they ▁produce ▁higher ▁amount ▁of ▁str ig ol act ones , ▁which ▁in ▁turn ▁will ▁increase ▁the ▁branch ing ▁of ▁AM ▁fung i . ▁This ▁excess ▁development ▁of ▁the ▁fung i ▁is ▁expected ▁to ▁provide ▁the ▁additional ▁ph osph ate ▁required ▁for ▁the ▁plant , ▁since ▁the ▁fung i ▁can ▁now ▁spread ▁to ▁more ▁soil ▁areas . ▁However , ▁since ▁str ig ol act one ▁also ▁stim ulate ▁the ▁germ ination ▁of ▁par as it ic ▁plants , ▁these ▁ph osph ate - def ic ient ▁plants , ▁also ▁present ▁higher ▁invasion ▁of ▁par as it ic ▁species ▁such ▁as ▁Str iga ▁sp . ▁Prov iding ▁ade qu ate ▁ph osph ate ▁through ▁soil ▁fert il ization ▁have ▁been ▁proved ▁to ▁reduce ▁the ▁pro l ifer ation ▁of ▁these ▁par as ites , ▁because ▁they ▁require ▁str ig ol act one ▁for ▁its ▁germ ination . ▁ ▁See ▁also ▁▁ ▁Plant ▁h orm one ▁ ▁D W AR F 2 7 ▁ ▁A ux in ▁ ▁Ab sc is ic ▁acid ▁ ▁Ar bus cular ▁my cor rh iza ▁ ▁References ▁▁ ▁Category : Pl ant ▁h orm ones ▁Category : S es qu iter p ene ▁la ct ones ▁Category : F ur an ones <0x0A> </s> ▁Gil