Contrasting responses of silver birch VOC emissions to short- and long-term herbivory

被引:37
|
作者
Maja, Mengistu M. [1 ]
Kasurinen, Anne [1 ]
Yli-Pirila, Pasi [2 ]
Joutsensaari, Jorma [2 ]
Klemola, Tero [3 ]
Holopainen, Toini [1 ]
Holopainen, Jarmo K. [1 ]
机构
[1] Univ Eastern Finland, Dept Environm Sci, FI-70211 Kuopio, Finland
[2] Univ Eastern Finland, Dept Appl Phys, FI-70211 Kuopio, Finland
[3] Univ Turku, Sect Ecol, Dept Biol, FI-20014 Turku, Finland
基金
芬兰科学院;
关键词
bark herbivory; foliage herbivory; genotype; geometrid moth; pine weevil; proton-transfer mass spectrometry; volatile organic compounds; VOLATILE ORGANIC-COMPOUNDS; BETULA-PENDULA; EPIRRITA-AUTUMNATA; PINE; PLANTS; FOREST; RANGE; INDUCTION; EXPANSION; CLIMATE;
D O I
10.1093/treephys/tpt127
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
There is a need to incorporate the effects of herbivore damage into future models of plant volatile organic compound (VOC) emissions at leaf or canopy levels. Short-term (a few seconds to 48 h) changes in shoot VOC emissions of silver birch (Betula pendula Roth) in response to feeding by geometrid moths (Erannis defoliaria Hubner) were monitored online by proton transfer reaction time-of-flight mass spectrometry (PTR-TOF-MS). In addition, two separate field experiments were established to study the effects of long-term foliage herbivory (FH, 30-32 days of feeding by geometrids Agriopis aurantiaria (Clerck) and E. defoliaria in two consecutive years) and bark herbivory (BH, 21 days of feeding by the pine weevil (Hylobius abietis L.) in the first year) on shoot and rhizosphere VOC emissions of three silver birch genotypes (gt14, gt15 and Hausjarvi provenance). Online monitoring of VOCs emitted from foliage damaged by geometrid larvae showed rapid bursts of green leaf volatiles (GLVs) immediately after feeding activity, whereas terpenoid emissions had a tendency to gradually increase during the monitoring period. Long-term FH caused transient increases in total monoterpene (MT) emissions from gt14 and sesquiterpene (SQT) emissions from Hausjarvi provenance, mainly in the last experimental season. In the BH experiment, genotype effects were detected, with gt14 trees having significantly higher total MT emissions compared with other genotypes. Only MTs were detected in the rhizosphere samples of both field experiments, but their emission rates were unaffected by genotype or herbivory. The results suggest that silver birch shows a rapid VOC emission response to short-term foliage herbivory, whereas the response to long-term foliage herbivory and bark herbivory is less pronounced and variable at different time points.
引用
收藏
页码:241 / 252
页数:12
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