title: Effects of exogenous plant growth regulator abscisic acid-induced resistance in rice on the expression of vitellogenin mRNA in Nilaparvata lugens (Hemiptera: Delphacidae) adult females.
abstract: Recent study showed that exogenous abscisic acid (ABA) acts as a regulator of plant resistance. This study investigated average injury scale and callose contents of rice, and vitellogenin (Nlvg) mRNA expression in Nilaparvata lugens (Stål) (Hemiptera: Delphacidae) adult females after third instar nymphs fed on exogenous ABA-treated susceptible [Taichung Native one (TN1)] and moderately resistant (IR42) rice cultivars. The results showed that exogenous ABA significantly decreased average injury scale of rice and Nlvg mRNA expression in N. lugens adults compared with the control (without ABA spraying). Nlvg mRNA expression in N. lugens adults decreased significantly after third instar nymphs fed on ABA-treated (5, 20, and 40 mg/liter) TN1 for 1 and 2 d, and for IR42, after fed on ABA-treated (20 and 40 mg/liter) rice plants for 1 d and after fed on ABA-treated (5, 20, and 40 mg/liter) rice for 2 d decreased significantly. The callose contents showed no significant change for TN1, while for IR42, significantly increased in roots and sheathes after N. lugens infestation under ABA treatments (20 and 40 mg/liter) compared with the control. The decrease of Nlvg mRNA expression may be partially attributed to the increase of callose content of plants. The results provide a profile for concerning the effects of ABA-induced rice plants' defenses on phloem-feeding insects.
authors.affiliation: School of Plant Protection, Yangzhou University, Yangzhou 225009, China liujl@yzu.edu.cn.
authors.forename: Jing-Lan
authors.initials: JL
authors.lastname: Liu
authors.affiliation: School of Plant Protection, Yangzhou University, Yangzhou 225009, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Chen
authors.affiliation: School of Plant Protection, Yangzhou University, Yangzhou 225009, China.
authors.forename: Hong-Mei
authors.initials: HM
authors.lastname: Zhang
authors.affiliation: School of Plant Protection, Yangzhou University, Yangzhou 225009, China.
authors.forename: Xia
authors.initials: X
authors.lastname: Yang
authors.affiliation: Department of Entomology, The University of Arizona, Tucson, AZ.
authors.forename: Andrew
authors.initials: A
authors.lastname: Wong
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology*; D000818:Animals; D005260:Female; D005786:Gene Expression Regulation / Q000187:drug effects; D005936:Glucans / Q000032:analysis; D006430:Hemiptera / Q000235:genetics* / Q000378:metabolism; D009758:Nymph / Q000235:genetics / Q000378:metabolism; D012275:Oryza / Q000737:chemistry / Q000187:drug effects* / Q000502:physiology; D010937:Plant Growth Regulators / Q000494:pharmacology; D012333:RNA, Messenger; D014819:Vitellogenins / Q000235:genetics* / Q000378:metabolism
chemical_list: D005936:Glucans; D010937:Plant Growth Regulators; D012333:RNA, Messenger; D014819:Vitellogenins; D000040:Abscisic Acid; C048306:callose
keywords: Nilaparvata lugens; Nlvg mRNA expression; abscisic acid; callose content; rice