title: Field application of safe chemical elicitors induced the expression of some resistance genes against grey mold and cottony rot diseases during snap bean pods storage.
abstract: Phaseolus vulgaris is subjected to serious post-harvest diseases such as grey mold and cottony rot diseases caused by Botrytis cinerea and Pythium aphanidermatum, respectively. In current study, potassium silicate (KSi), potassium thiosulfate (KTS) and potassium sulfate (KS) suppressed moderately the growth of B. cinerea and P. aphanidermatum in vitro. The applied treatments significantly suppressed grey mold and cottony rot of Xera and Valentino snap beans varieties' pods stored at 7 ± 1°C and 90-95% RH for 20 days. Ethylene responsive factor (ERF), polygalacturonase inhibitor protein (PGIP), phosphatase associated to defense (PA) and pathogenesis-related protein (PR1) defense genes were over-expressed in leaves tissue of both bean varieties responding positively to potassium salts field application. The expression of these genes was influenced by plant genotype and environment as it varied by snap bean varieties. Accumulation of ERF, GIP, PA and PR1 genes transcript under KTS at 4000 ppm treatment were the highest in Xera tissues (3.5-, 4.8-, 4- and 4.8-fold, respectively). In conclusion, pre-harvest potassium salt in vivo application could be used as effective safe alternatives to fungicides against grey mold and cottony rot diseases of snap beans during storage for up to 20 days at 7 ± 1°C.
authors.affiliation: Genetics and Genetic Engineering Department, Faculty of Agriculture, Benha University, Moshtohor 13736, Qalyubia, Egypt. Electronic address: hoda.algarhy@fagr.bu.edu.eg.
authors.forename: Hoda A S
authors.initials: HA
authors.lastname: El-Garhy
authors.affiliation: Post-harvest Diseases Department, Plant Pathology Research Institute, Agricultural Research Center (ARC), Giza, Egypt.
authors.forename: Ismail A S
authors.initials: IA
authors.lastname: Rashid
authors.affiliation: Nucleic Acid and Protein Structure Department, Agricultural Genetic Engineering Research Institute (AGERI), Agricultural Research Center (ARC), Giza, Egypt.
authors.forename: Rania M
authors.initials: RM
authors.lastname: Abou-Ali
authors.affiliation: Genetics and Genetic Engineering Department, Faculty of Agriculture, Benha University, Moshtohor 13736, Qalyubia, Egypt.
authors.forename: Mahmoud M A
authors.initials: MM
authors.lastname: Moustafa
mesh_terms: D000383:Agriculture / Q000379:methods; D020171:Botrytis / Q000187:drug effects* / Q000472:pathogenicity; D060467:Disease Resistance / Q000235:genetics; D005659:Fungicides, Industrial / Q000494:pharmacology; D018506:Gene Expression Regulation, Plant; D027805:Phaseolus / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism; D010935:Plant Diseases / Q000235:genetics / Q000382:microbiology / Q000517:prevention & control; D018515:Plant Leaves / Q000187:drug effects / Q000235:genetics; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D011188:Potassium / Q000494:pharmacology; D011775:Pythium / Q000187:drug effects* / Q000472:pathogenicity; D017640:Silicates / Q000494:pharmacology; D013431:Sulfates / Q000494:pharmacology*; D013885:Thiosulfates / Q000494:pharmacology*
chemical_list: D005659:Fungicides, Industrial; D010940:Plant Proteins; D017640:Silicates; D013431:Sulfates; D013885:Thiosulfates; C031512:potassium sulfate; D011188:Potassium; C042124:potassium thiosulfate
keywords: Cottony rot; Defense genes; Grey mold; Snap bean; Sustainable agriculture; qRT-PCR