title: Effects of abscisic acid and nitric oxide on trap formation and trapping of nematodes by the fungus Drechslerella stenobrocha AS6.1.
abstract: The in vitro effects of abscisic acid (ABA) and nitric oxide (NO) on the nematode-trapping fungus Drechslerella stenobrocha AS6.1 were examined. The average number of traps (constricting rings) per colony and the percentage of nematodes (Caenorhabditis elegans) trapped were greatly increased by addition of ABA but greatly suppressed by addition of sodium nitroprusside (SNP, an NO donor) to corn meal agar. The suppressive effect of SNP was not negated by addition of an NO synthase competitive inhibitor (l-naphthylacetic acid, L-NNA) or an NO-specific scavenger [2-(4-carboxyphenyl)-4,4, 5,5-tetramethylimidazoline-1-oxyl-3-oxide, cPTIO]. When added without SNP, however, L-NNA and cPTIO caused moderate increases in trap number and trapping. The results indicate that the trap formation and nematode-trapping ability of D. stenobrocha were enhanced by ABA but decreased by exogenous NO.
authors.affiliation: Department of Life Science, Xi'an University of Arts and Science, Xi'an, China. liuxz@im.ac.cn
authors.forename: Ling-Ling
authors.initials: LL
authors.lastname: Xu
authors.forename: Yi-Ling
authors.initials: YL
authors.lastname: Lai
authors.forename: Lin
authors.initials: L
authors.lastname: Wang
authors.forename: Xing-Zhong
authors.initials: XZ
authors.lastname: Liu
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology*; D000818:Animals; D001203:Ascomycota / Q000187:drug effects / Q000502:physiology*; D009348:Nematoda / Q000187:drug effects / Q000382:microbiology*; D009569:Nitric Oxide / Q000494:pharmacology*
chemical_list: D009569:Nitric Oxide; D000040:Abscisic Acid