Induction of tomato stress protein mRNAs by ethephon, 2,6-dichloroisonicotinic acid and salicylate.
To study the possible involvement of plant hormones in the synthesis of stress proteins in tomato upon inoculation with Cladosporium fulvum, we investigated the induction of mRNAs encoding PR proteins and ethylene biosynthesis enzymes by ethephon, 2,6-dichloroisonicotinic acid (INA) and salicylic acid (SA) by northern blot analysis. Ethephon slightly induced some but not all mRNAs encoding intra- and extracellular PR proteins. INA induced all PR protein mRNAs analysed, except for intracellular chitinase and extracellular PR-4. SA induced all PR protein mRNAs analyzed, except for intracellular chitinase and osmotin. None of the inducers affected the expression of ACC synthase mRNA, whereas all three induced ethylene-forming enzyme (EFE) mRNA.
Van Kan
J A
JA
Wageningen Agricultural University, Department of Phytopathology, The Netherlands.
Cozijnsen
T
T
Danhash
N
N
De Wit
P J
PJ
D015870:Gene Expression / Q000187:drug effects; D007539:Isonicotinic Acids / Q000494:pharmacology*; D018551:Solanum lycopersicum / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism; D009943:Organophosphorus Compounds / Q000494:pharmacology*; D010937:Plant Growth Regulators / Q000494:pharmacology; D010940:Plant Proteins / Q000096:biosynthesis / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics*; D012459:Salicylates / Q000494:pharmacology*; D020156:Salicylic Acid
D007539:Isonicotinic Acids; D009943:Organophosphorus Compounds; D010937:Plant Growth Regulators; D010940:Plant Proteins; D012333:RNA, Messenger; D012459:Salicylates; C053376:pathogenesis-related proteins, plant; C077261:2,6-dichloroisonicotinic acid; D020156:Salicylic Acid; C005073:ethephon