▁hy pha e ▁age ▁and ▁are ▁eventually ▁dis integr ated , ▁or ▁l ys ed , ▁they ▁appear ▁as ▁brown ▁or ▁yellow ▁cl umps ▁in ▁the ▁orch id ▁cells . ▁The ▁dis integr ated ▁pel ot ons ▁are ▁an ▁area ▁of ▁considerable ▁interest ▁in ▁current ▁research . ▁The ▁dis integr ated ▁pel ot ons ▁first ▁experience ▁a ▁collapse ▁where ▁orch id ▁micro t ub ules ▁surr ound ▁the ▁pel ot ons , ▁which ▁may ▁be ▁the ▁mechanism ▁behind ▁the ▁pel ot on ▁collapse ▁by ▁producing ▁phys i ological ▁and ▁struct ural ▁changes ▁of ▁the ▁hy pha e . ▁The ▁cort ical ▁cells ▁of ▁older ▁roots ▁tend ▁to ▁have ▁more ▁l ys ed ▁pel ot ons ▁than ▁young ▁pel ot ons . ▁Although ▁pel ot ons ▁are ▁l ys ed , ▁new ▁pel ot ons ▁continue ▁to ▁be ▁formed , ▁which ▁indicates ▁a ▁high ▁amount ▁of ▁new ▁hy phal ▁activity . ▁ ▁F ung i ▁forming ▁orch id ▁my cor rh iz ae ▁ ▁Bas idi om yc et ous ▁Rh izo ct onia ▁F ung i ▁ ▁The ▁fung i ▁that ▁form ▁orch id ▁my cor rh iz ae ▁are ▁typically ▁bas idi om yc etes . ▁These ▁fung i ▁come ▁from ▁a ▁range ▁of ▁tax a ▁including ▁Cer at ob as id ium ▁( R h izo ct onia ), ▁Seb ac ina , ▁T ulas n ella ▁and ▁Russ ula ▁species . ▁Most ▁orch ids ▁associate ▁with ▁sap rot roph ic ▁or ▁path ogen ic ▁fung i , ▁while ▁a ▁few