1 5 ▁containing ▁comp ound ▁was ▁even ▁more ▁pron ounced , ▁and ▁significantly ▁higher ▁than ▁in ▁live ▁pel ot ons . ▁This ▁indicates ▁that ▁as ▁plant ▁pel ot ons ▁start ▁to ▁sen esc ence ▁they ▁are ▁loaded ▁with ▁carbon ▁and ▁nit ro gen ▁nut rit ive ▁comp ounds , ▁hypoth et ically ▁to ▁be ▁transferred ▁to ▁the ▁plant ▁during ▁l ysis . ▁Mor ph ological ▁changes ▁in ▁the ▁hyp he a ▁further ▁support ▁this ▁proposition , ▁in ▁that ▁the ▁last ▁morph ological ▁change ▁in ▁the ▁pel ot on ▁before ▁is ▁col laps es ▁is ▁a ▁sw elling , ▁perhaps ▁due ▁to ▁the ▁increased ▁nut rit ive ▁comp ound ▁load . ▁Once ▁dig estion ▁is ▁complete , ▁rein fection ▁of ▁the ▁dig est ive ▁cell ▁will ▁occur ▁shortly ▁after ▁and ▁a ▁new ▁pel ot on ▁will ▁form , ▁and ▁eventually ▁will ▁be ▁de grad ed . ▁Rein fection ▁and ▁dig estion ▁are ▁a ▁continu um ▁and ▁will ▁cy clic ally ▁occur ▁throughout ▁the ▁entire ▁life ▁span ▁of ▁the ▁co operation . ▁R asm ussen ▁ 2 0 0 9 ▁differenti ates ▁two ▁types ▁of ▁plant ▁host ▁cells ▁which ▁are ▁involved ▁in ▁nut ri ent ▁transfer , ▁so ▁called ▁' dig estion ▁cells ' ▁and ▁so ▁called ▁' host ▁cells ', ▁' dig est ive ▁cells ' ▁apparently ▁eng age ▁in ▁dense ▁hy phal ▁pel ot on ▁formation ▁followed ▁by ▁a ▁rapid ▁dig estion ▁and ▁subsequent ▁rein fection , ▁where ▁as ▁' host ▁cells ' ▁contain ▁live ▁hy pha e ▁pel ot ons , ▁which