Differential Responses of Forage Pearl Millet Genotypes to Chinch Bug (Heteroptera: Blissidae) Feeding

Ni, Xinzhi; Wilson, J. L.; Buntin, G. David

doi:10.1603/029.102.0529

Cited by 11 publications

(5 citation statements)

References 26 publications

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“…Similar compensatory photosynthetic mechanisms have been observed in tolerant but not susceptible cultivars of the turf grass species Buchloë dactyloides (Heng-Moss et al 2006) and the forage crop pearl millet (Ni, Wilson & Buntin 2009) following exposure to phloem-feeding chinch bugs (Blissus occiduus). In the B. dactyloides-B.…”

Section: Insect Herbivory Impacts Primary Metabolic Processessupporting

confidence: 59%

“…Similar compensatory photosynthetic mechanisms have been observed in tolerant but not susceptible cultivars of the turf grass species Buchloë dactyloides (Heng‐Moss et al . 2006) and the forage crop pearl millet (Ni, Wilson & Buntin 2009) following exposure to phloem‐feeding chinch bugs ( Blissus occiduus ). In the B. dactyloides – B. occiduus interaction, susceptible lines accumulated carbohydrate in the leaves, exhibited reduced rates of CO 2 fixation, photosynthetic electron transport and the photochemical efficiencies of photosystem II (PSII) leading to the conclusion that insect attack led to end‐product inhibition of photosynthesis with impaired electron flow through PSII.…”

Section: Insect Herbivory Impacts Primary Metabolic Processesmentioning

confidence: 99%

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Plant responses to insect herbivory: interactions between photosynthesis, reactive oxygen species and hormonal signalling pathways

Kerchev

Fenton

Foyer

et al. 2011

Plant Cell & Environment

299

184

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Under herbivore attack plants mount a defence response characterized by the accumulation of secondary metabolites and inhibitory proteins. Significant changes are observed in the transcriptional profiles of genes encoding enzymes of primary metabolism. Such changes have often been interpreted in terms of a requirement for an increased investment of resources to 'fuel' the synthesis of secondary metabolites. While enhanced secondary metabolism undoubtedly exerts an influence on primary metabolism, accumulating evidence suggests that rather than stimulating photosynthesis insect herbivory reduces photosynthetic carbon fixation and this response occurs by a re-programming of gene expression. Within this context, reactive oxygen species (ROS) and reductant/oxidant (redox) signalling play a central role. Accumulating evidence suggests that ROS signalling pathways are closely interwoven with hormone-signalling pathways in plant-insect interactions. Here we consider how insect infestation impacts on the stress signalling network through effects on ROS and cellular redox metabolism with particular emphasis on the roles of ROS in the plant responses to phloem-feeding insects.

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Section: Insect Herbivory Impacts Primary Metabolic Processessupporting

confidence: 59%

Section: Insect Herbivory Impacts Primary Metabolic Processesmentioning

confidence: 99%

Plant responses to insect herbivory: interactions between photosynthesis, reactive oxygen species and hormonal signalling pathways

Kerchev

Fenton

Foyer

et al. 2011

Plant Cell & Environment

299

184

View full text Add to dashboard Cite

show abstract

“…Similar results were observed in Ni et al [25] wherein attacks by Blissus leucopterus significantly reduced the chlorophyll content and, consequently, the photosynthetic rate in certain forage millet genotypes under field conditions; those authors reported that such a reduction decreased the leaf area and, consequently, reduced the accumulated biomass. Similarly, Wang et al [26] observed reductions in chlorophyll content due to an attack by herbivores, which may negatively affect plants' photosynthetic capacities.…”

Section: Discussionsupporting

confidence: 89%

The Damage Capacity of Mahanarva spectabilis (Distant, 1909) (Hemiptera: Cercopidae) Adults on Brachiaria ruziziensis Pasture

Resende

Auad

Fonseca

et al. 2013

The Scientific World Journal

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The aim of this study was to determine the damage caused by adult Mahanarva spectabilis (Distant, 1909) (Hemiptera: Cercopidae) on Brachiaria ruziziensis (Germain & Evard) under field conditions. A total of 0, 4, 8, 12, or 16 M. spectabilis adults per plot were maintained for 6 days. Thereafter, the insects were removed from the plant, and the following parameters were evaluated: chlorophyll content, damage score, dry as well as fresh weights, percentage of shoots' dry matter, and the forage's ability to regrow. The chlorophyll content was significantly reduced; the damage score and percentage of dry matter in plants increased depending on the increased insect infestation density after 6 days of exposure. In contrast, no change was observed on the B. ruziziensis fresh and dry weights as well as the regrowth capacity depending on the M. spectabilis infestation densities. Attacks by 8 adult M. spectabilis per clump of B. ruziziensis with an average of 80 tillers for 6 days were sufficient to reduce the chlorophyll content and the functional plant loss index. This density can be a reference for spittlebug integrated management in Brachiaria.

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“…Moreover, according to Nabity et al [29], when the insects feed on the xylem or phloem, water transport, stomatal aperture, and sucrose transport are affected, thereby reducing photosynthesis in the remaining leaf tissue of the attacked plants. Reduction in chlorophyll content and consequent reduction in photosynthetic capability have been observed for other sucking insects [30, 31]. According to Welter [32], 50% of the studies that examined insect-plant interactions have reported a loss of photosynthetic capability in the plants.…”

Section: Resultsmentioning

confidence: 99%

Impact of the SpittlebugMahanarva spectabilison Signal Grass

Resende

Auad

Fonseca

et al. 2012

The Scientific World Journal

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The aim of this study was to determine the damage in Brachiaria ruziziensis (Germain & Edvard) according to the density of and exposure time to adults of Mahanarva spectabilis (Distant, 1909) (Hemiptera:Cercopidae). Each plant was kept with 0, 12, 18, or 24 adults of M. spectabilis for five or ten days. Then, the insects were removed from the plant, and the following parameters were evaluated: content and loss of chlorophyll, visual damage score, shoot dry mass, and the capability for regrowth. In fact, plants exposed to the highest level of infestation for 10 days showed an 80.97% loss of chlorophyll, which is 25% higher than that shown by the plants exposed for five days. The damage score also increased with infestation levels. In the levels of 12 and 18 adults per plant, the damage score increased with increasing time of exposure. The dry mass content was higher in plants exposed to 24 insects for 10 days, suggesting that the attack of spittlebugs caused premature drying of the plant. These effects caused significant reduction in the number of tillers of infested plants. Our results indicate that exposure to adults of M. spectabilis causes significant damage and affects the development and persistence of B. ruziziensis plants.

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Differential Responses of Forage Pearl Millet Genotypes to Chinch Bug (Heteroptera: Blissidae) Feeding

Cited by 11 publications

References 26 publications

Plant responses to insect herbivory: interactions between photosynthesis, reactive oxygen species and hormonal signalling pathways

Plant responses to insect herbivory: interactions between photosynthesis, reactive oxygen species and hormonal signalling pathways

The Damage Capacity of Mahanarva spectabilis (Distant, 1909) (Hemiptera: Cercopidae) Adults on Brachiaria ruziziensis Pasture

Impact of the SpittlebugMahanarva spectabilison Signal Grass

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