Compensation for Herbivory in Cruciferous Plants: Specific Responses to Three Defoliating Insects

Gavloski, John; Lamb, Robert J.

doi:10.1603/0046-225x-29.6.1258

Cited by 29 publications

(32 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overcompensation has been described for many brassicaceous species and genera used in our study, such as Raphanus raphanistrum L., B. napus, Sinapis alba L. and several more (Gavloski and Lamb 2000;Agrawal 2001, and others) in that feeding damage to leaves can increase plant reproductive fitness, including via increased seed weight (e.g. Agrawal 2001).…”

Section: Effects Of Feeding Damage To the Different Plant Components mentioning

confidence: 75%

Feeding damage to plants increases with plant size across 21 Brassicaceae species

et al. 2015

View full text Add to dashboard Cite

Plant size is a major predictor of ecological functioning. We tested the hypothesis that feeding damage to plants increases with plant size, as the conspicuousness of large plants makes resource finding and colonisation easier. Further, large plants can be attractive to herbivores, as they offer greater amounts and ranges of resources and niches, but direct evidence from experiments testing size effects on feeding damage and consequently on plant fitness is so far missing. We established a common garden experiment with a plant size gradient (10-130 cm height) using 21 annual Brassicaceae species, and quantified plant size, biomass and number of all aboveground components (flowers, fruits, leaves, stems) and their proportional feeding damage. Plant reproductive fitness was measured using seed number, 1000 seed weight and total seed weight. Feeding damage to the different plant components increased with plant size or component biomass, with mean damage levels being approximately 30 % for flowers, 5 % for fruits and 1 % for leaves and stems. Feeding damage affected plant reproductive fitness depending on feeding damage type, with flower damage having the strongest effect, shown by greatly reduced seed number, 1000 seed weight and total seed weight. Finally, we found an overall negative effect of plant size on 1000 seed weight, but not on seed number and total seed weight. In conclusion, being conspicuous and attractive to herbivores causes greater flower damage leading to higher fitness costs for large plants, which might be partly counterbalanced by benefits such as enhanced competitive/compensatory abilities or more mutualistic pollinator visits.

show abstract

Section: Effects Of Feeding Damage To the Different Plant Components mentioning

confidence: 75%

Feeding damage to plants increases with plant size across 21 Brassicaceae species

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Together with other model crucifers (e.g., rapid cycling Brassica), research in Arabidopsis is relevant to the production of annual crops, particularly those in the same family (canola, mustard, broccoli, etc. ; Gavloski and Lamb 2000;Oerke 2006).…”

Section: Study Organismsmentioning

confidence: 99%

Ontogenetic changes in tolerance to herbivory in Arabidopsis

Tucker

Ávila-Sakar

2010

Oecologia

View full text Add to dashboard Cite

Tolerance to herbivory-the ability of plants to maintain fitness despite herbivore damage-is expected to change during the life cycle of plants because the physiological mechanisms underlying tolerance to herbivory are linked to growth, and resource allocation to growth changes throughout ontogeny. We used the model plant Arabidopsis thaliana to test two hypotheses: that tolerance increases as plants grow, and that tolerance decreases at the onset of reproduction. We chose three accessions previously reported to vary for resistance to herbivory in order to explore whether tolerance and resistance are inversely related. Cabbage looper (Trichoplusia ni) larvae were allowed to feed on plants at either the four-leaf, six-leaf, or 1st-flower developmental stage until 50% of the leaf area was removed. Overall, we found a trend for increased tolerance with ontogenetic stage, but there were important differences among accessions in their response to herbivory at different stages. Tolerance did not decrease with the onset of flowering, nor did we find any correlation between resistance and tolerance levels. Three main plant traits correlated strongly with tolerance: stem mass, an earlier onset of reproduction and a longer fruiting period. This study suggests there may be considerable variation in ontogenetic patterns of tolerance in natural populations of A. thaliana, and warrants further investigations with more accessions or natural populations, and detailed measurements of traits purported to contribute to tolerance in our quest to understand the mechanisms of tolerance to herbivory.

show abstract

“…Treatments had little effect on the survivorship of B. napus at the vegetative stage (ANOVA df 0/6, 30, F0/2.05; p ]/0.05, Figure 3B) indicating that there were no performance benefits during this period. During this phase there is probably an over-compensation for any herbivory in control treatments as is common in brassicas (Gavloski & Lamb 2000b). However in the reproductive stage, i.e., at harvest there were significant differences in the numbers of plants surviving between the treatments (ANOVA df 0/6, 30, F 0/3.14; p B/0.05, Figure 3B) on log 10 (n'/1) transformed data.…”

Section: Field Simulation 2002 á/2003mentioning

confidence: 90%

Risk assessment ofBacillus thuringiensisin wildBrassica rapa:A field simulation of introgressed transgenes

Sutherland

Poppy

2005

Journal of Plant Interactions

View full text Add to dashboard Cite

Brassica crops are able to hybridize with closely related wild and weedy species such as Brassica rapa and therefore these species could become recipients of transgenes from GM brassica crops, such as oilseed rape. Transgenes which protect against herbivory, such as a gene conferring the production of a Bt toxin, could increase the recipient's fitness and therefore enhance its competitiveness. We used microbial Bt and several other pesticides to exclude several guilds of herbivores and thus simulate the effect of transgene introgression on the performance of wild B. rapa . There were only minor negative effects of excluding insect herbivores on the performance of B. rapa and it appears that vertebrate herbivory has a more significant effect. The advantages and disadvantages of simulating the risks associated with GM plants are discussed. If we apply this simulation to GM risk assessment and make inferences from these findings, the implications of this for gene flow from insect-resistant transgenic plants are that it will be of little significance should it occur.

show abstract

Compensation for Herbivory in Cruciferous Plants: Specific Responses to Three Defoliating Insects

Cited by 29 publications

References 22 publications

Feeding damage to plants increases with plant size across 21 Brassicaceae species

Feeding damage to plants increases with plant size across 21 Brassicaceae species

Ontogenetic changes in tolerance to herbivory in Arabidopsis

Risk assessment ofBacillus thuringiensisin wildBrassica rapa:A field simulation of introgressed transgenes

Contact Info

Product

Resources

About