Induction of volatile emissions in maize by different larval instars of Spodoptera littoralis

被引:101
作者
Gouinguené, S
Alborn, H
Turlings, TCJ
机构
[1] Univ Neuchatel, Inst Zool, Lab Anim Ecol & Entomol, CH-2007 Neuchatel, Switzerland
[2] USDA ARS, Gainesville, FL USA
关键词
larval instar; induced plant volatiles; specificity-reliability; 6-arm olfactometer; Zea mays; Spodoptera littoralis; Microplitis rufiventris;
D O I
10.1023/A:1021984715420
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Maize plants under attack by caterpillars emit a specific blend of volatiles that is highly attractive to parasitic wasps. The release of these signals is induced by elicitors in the caterpillar regurgitant. Studies suggest that plants respond differently to different herbivore species and even to different herbivore stages, thus providing parasitoids and predators with specific signals. We tested if this is the case for different larval instars of the noctuid moth Spodoptera littoralis when they feed on maize plants. Cut maize plants were incubated in diluted regurgitant from second, third, or fifth instar caterpillars. There were no differences in total amount released after these treatments, but there were small differences in the release of the minor compounds phenethyl acetate and alpha-humulene. Regurgitant of all three instars contained the elicitor volicitin. To test the effect of actual feeding by the larvae, potted plants were infested with caterpillars of one of the three instars, and volatiles were collected the following day. The intensity of the emissions was correlated with the number of larvae feeding on a plant, and with the amount of damage inflicted, but was independent of the instar that caused the damage. We also used artificial damage to mimic the manner of feeding of each instar to test the importance of physical aspects of damages for the odor emission. The emission was highly variable, but no differences were found among the different types of damage. In olfactometer tests, Microplitis rufiventris, a parasitoid that can only successfully parasitize second and early third instar S. littoralis, did not differentiate among the odors of maize plants attacked by different instar larvae. The odor analyses as well as the parasitoid's responses indicate that maize odors induced by S. littoralis provide parasitoids with poor information on the larval developmental stage. We discuss the results in the context of variability and lack of specificity in odorous plant signals.
引用
收藏
页码:145 / 162
页数:18
相关论文
共 29 条
[1]   PLANT NATURAL ENEMY ASSOCIATION IN TRITROPHIC SYSTEM, COTESIA-RUBECULA-PIERIS-RAPAE-BRASSICACEAE (CRUCIFERAE) .3. COLLECTION AND IDENTIFICATION OF PLANT AND FRASS VOLATILES [J].
AGELOPOULOS, NG ;
KELLER, MA .
JOURNAL OF CHEMICAL ECOLOGY, 1994, 20 (08) :1955-1967
[2]   An elicitor of plant volatiles from beet armyworm oral secretion [J].
Alborn, HT ;
Turlings, TCJ ;
Jones, TH ;
Stenhagen, G ;
Loughrin, JH ;
Tumlinson, JH .
SCIENCE, 1997, 276 (5314) :945-949
[3]   Identification and synthesis of volicitin and related components from beet armyworm oral secretions [J].
Alborn, HT ;
Jones, TH ;
Stenhagen, GS ;
Tumlinson, JH .
JOURNAL OF CHEMICAL ECOLOGY, 2000, 26 (01) :203-220
[4]   Herbivore-infested plants selectively attract parasitoids [J].
De Moraes, CM ;
Lewis, WJ ;
Paré, PW ;
Alborn, HT ;
Tumlinson, JH .
NATURE, 1998, 393 (6685) :570-573
[5]   HOW PLANTS OBTAIN PREDATORY MITES AS BODYGUARDS [J].
DICKE, M ;
SABELIS, MW .
NETHERLANDS JOURNAL OF ZOOLOGY, 1988, 38 (2-4) :148-165
[6]   PLANT STRATEGIES OF MANIPULATING PREDATOR-PREY INTERACTIONS THROUGH ALLELOCHEMICALS - PROSPECTS FOR APPLICATION IN PEST-CONTROL [J].
DICKE, M ;
SABELIS, MW ;
TAKABAYASHI, J ;
BRUIN, J ;
POSTHUMUS, MA .
JOURNAL OF CHEMICAL ECOLOGY, 1990, 16 (11) :3091-3118
[7]   HERBIVORY INDUCES SYSTEMIC PRODUCTION OF PLANT VOLATILES THAT ATTRACT PREDATORS OF THE HERBIVORE - EXTRACTION OF ENDOGENOUS ELICITOR [J].
DICKE, M ;
VANBAARLEN, P ;
WESSELS, R ;
DIJKMAN, H .
JOURNAL OF CHEMICAL ECOLOGY, 1993, 19 (03) :581-599
[8]   Identification of semiochemicals released during aphid feeding that attract parasitoid Aphidius ervi [J].
Du, YJ ;
Poppy, GM ;
Powell, W ;
Pickett, JA ;
Wadhams, LJ ;
Woodcock, CM .
JOURNAL OF CHEMICAL ECOLOGY, 1998, 24 (08) :1355-1368
[9]   Variability in herbivore-induced odour emissions among maize cultivars and their wild ancestors (teosinte) [J].
Gouinguené, S ;
Degen, T ;
Turlings, TCJ .
CHEMOECOLOGY, 2001, 11 (01) :9-16
[10]   The effects of abiotic factors on induced volatile emissions in corn plants [J].
Gouinguené, SP ;
Turlings, TCJ .
PLANT PHYSIOLOGY, 2002, 129 (03) :1296-1307