title: Preharvest L-arginine treatment induced postharvest disease resistance to Botrysis cinerea in tomato fruits.
abstract: L-arginine is the precursor of nitric oxide (NO). In order to examine the influence of L-arginine on tomato fruit resistance, preharvest green mature tomato fruits (Solanum lycopersicum cv. No. 4 Zhongshu) were treated with 0.5, 1, and 5 mM L-arginine. The reduced lesion size (in diameter) on fruit caused by Botrytis cinerea, as well as activities of phenylalanine ammonia-lyase (PAL), Chitinase (CHI), β-1,3-glucanase (GLU), and polyphenoloxidase (PPO), was compared between L-arginine treated fruits and untreated fruits. We found that induced resistance increased and reached the highest level at 3-6 days after treatment. Endogenous NO concentrations were positively correlated with PAL, PPO, CHI, and GLU activities after treatment with Pearson coefficients of 0.71, 0.94, 0.97, and 0.87, respectively. These results indicate that arginine induces disease resistance via its effects on NO biosynthesis and defensive enzyme activity.
authors.affiliation: College of Food Science and Nutritional Engineering, China Agricultural University , Beijing 100083, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zheng
authors.forename: Jiping
authors.initials: J
authors.lastname: Sheng
authors.forename: Ruirui
authors.initials: R
authors.lastname: Zhao
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Shengnan
authors.initials: S
authors.lastname: Lv
authors.forename: Lingyi
authors.initials: L
authors.lastname: Liu
authors.forename: Lin
authors.initials: L
authors.lastname: Shen
mesh_terms: D001120:Arginine / Q000494:pharmacology*; D020171:Botrytis / Q000276:immunology / Q000502:physiology*; D004156:Catechol Oxidase / Q000276:immunology; D005519:Food Preservation; D005638:Fruit / Q000187:drug effects / Q000201:enzymology / Q000276:immunology / Q000382:microbiology; D007113:Immunity, Innate; D018551:Solanum lycopersicum / Q000187:drug effects* / Q000201:enzymology / Q000276:immunology* / Q000382:microbiology; D010650:Phenylalanine Ammonia-Lyase / Q000276:immunology; D010935:Plant Diseases / Q000276:immunology / Q000382:microbiology*; D010940:Plant Proteins / Q000276:immunology
chemical_list: D010940:Plant Proteins; D001120:Arginine; D004156:Catechol Oxidase; D010650:Phenylalanine Ammonia-Lyase