title: [Stimulation of induction or inhibition of crown-gall tumor development by RNA-fragments U2. Interference by auxin].
abstract: RNA-fragments U2 obtained by mild degradation with RNase U2 of ribosomal RNA containing A and G nucleotides in excess are capable of exhibiting either a stimulatory effect on the induction of Crown-gall tumors or an inhibitory action on their subsequent development. These different effects are dependent on the moment at which RNA-fragments were introduced into wounded Pea seedlings infected by Agrobacterium tumefaciens B6. The results obtained in vitro and in vivo suggest that an interaction between auxin and RNA-fragments U2 may take place, either increasing the tumor induction or inhibiting the proliferation of tumourous cells.
mesh_terms: D002471:Cell Transformation, Neoplastic; D007210:Indoleacetic Acids / Q000494:pharmacology*; D010937:Plant Growth Regulators / Q000494:pharmacology*; D010941:Plant Tumors / Q000032:analysis / Q000139:chemically induced* / Q000209:etiology; D012335:RNA, Ribosomal / Q000494:pharmacology*; D012231:Rhizobium; D012260:Ribonucleases / Q000378:metabolism; D012270:Ribosomes / Q000201:enzymology
chemical_list: D007210:Indoleacetic Acids; D010937:Plant Growth Regulators; D012335:RNA, Ribosomal; D012260:Ribonucleases
vernacular_title: Stimulation de l'induction--ou inhibition du d'eveloppement--des tumeurs de Crown-gall par des ARN-fragments U2. Interférence de l'auxine.