Plant Defenses Against Insect Herbivory

Farha-Rehman,; Khan, Fareed Ahmad; Anis, Shoeba Binte; Badruddin, S. M. A.

doi:10.1007/978-90-481-8606-8_8

Cited by 5 publications

(3 citation statements)

References 63 publications

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“…Insect colonization on plants triggers gene expression changes that mount defense responses consisting of morphological changes and biochemical defenses (Fernandes, 1994;Farha et al, 2010;War et al, 2012;Furstenberg-Hagg et al, 2013). Transcriptome analysis studies have been conducted for soybean genotypes carrying Rag1, Rag2 (both providing antibiosis-type resistance), and Rag5 (antixenosis).…”

Section: Potential Mechanisms Of Rag Gene Actionmentioning

confidence: 99%

The Resistant Soybean-Aphis glycines Interaction: Current Knowledge and Prospects

Natukunda

MacIntosh

2020

Front. Plant Sci.

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Soybean aphids (Aphis glycines Matsumura) are invasive insect pests of soybean, and they cause significant yield losses. Resistance to soybean aphids is conferred by Resistance to Aphis glycines (Rag) genes. Since the first discovery of aphid-resistant soybean genotypes in 2004, several studies have attempted to characterize Rag genes from aphid-resistant soybean genotypes. To date, 12 Rag genes and four quantitative trait loci for aphid resistance have been reported on soybean chromosomes 07, 08, 13, 16, and 17. Although candidate genes have been proposed for several discovered Rag loci, additional studies are needed to pinpoint, validate, and further explain the potential mechanisms of Rag gene action. A major challenge to utilizing host plant resistance is the discovery of virulent aphid biotypes that can colonize aphid-resistant soybean. This occurrence suggests the need for additional studies to devise strategies to enhance the effectiveness of aphid-resistant soybean. In this mini review, we discuss current knowledge on the resistant soybean-Aphis glycines interaction, potential mechanisms of Rag gene action, opportunities to discover new Rag genes, and prospects for utilization of host plant resistance to manage soybean aphids. A clearer understanding of host plant resistance to soybean aphids will guide researchers on strategies for developing soybean varieties with more durable aphid resistance, reducing the present challenge of virulent aphid biotypes.

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Section: Potential Mechanisms Of Rag Gene Actionmentioning

confidence: 99%

The Resistant Soybean-Aphis glycines Interaction: Current Knowledge and Prospects

Natukunda

MacIntosh

2020

Front. Plant Sci.

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“…The host plants, attacking herbivores and plant mustard predator have co-evolved for a controlled partitioning of photosynthates (energy) from plants to herbivores and to carnivores for just sustainable ecosystem functioning. On insect attack, the host plants with specific genes switch on to the biochemical process for sequestering different blends of volatile chemicals to (a) ward off the herbivores and/or (b) signal-specific predator/ parasite for attacking herbivore or plant pests (De Moraes et al 2001;Farha-Rehman et al 2010;Farha-Rehman, Khan, & Badruddin 2012;Farha-Rehman, Khan, & Anis 2012). The crop growers may avoid excessive use of pesticides on proper selection of ecosystem friendly cultivars.…”

Section: Introductionmentioning

confidence: 95%

Assessment of aphid infestation levels in some cultivars of mustard with varying defensive traits

Rehman

Khan

Anis

2013

Archives Of Phytopathology And Plant Protection

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Phloem-sucking mustard aphid (Lipaphis erysimi) is a major pest of mustard (Brassica juncea). Pot experiment with randomised block design was conducted with five replicates of each of five cultivars (Alankar, Pusa Jai Kisan, Rohini, Sakha and Varuna) of the mustard for their degree of inherited resistance and/or susceptibility to the mustard aphid infestation. Forty-five days old (from date of sowing) pot-grown plants of all selected cultivars of mustard were exposed to 40 adult mustard aphids. The aphid-infested plants were kept in specially designed net houses of fine mesh to protect from predators and/or migration of aphids from one to other host. The aphid population and some growth attributes of the selected cultivars of mustard were recorded 15 and 30 days later (i.e. at 60 and 75 days after sowing). The aphid population multiplied more rapidly on Rohini than other four cultivars. Cultivar Alankar resisted most and supported to least number of aphid's off-springs. Statistically analysed growth attributes (fresh plant mass, dry plant mass, protein, chlorophyll and carotenoid contents), resistance attribute (proline) and population demography of aphids revealed that some inherited characteristics of avoidance, antibiosis and repellence to herbivores helped cultivar Alankar to excel despite equal degree of aphid attacks as on other cultivars. Cultivar Rohini for the want of such resisting factors remained vulnerable to aphid herbivory. These two cultivars (Alankar and Rohini) form good research material for comparative studies on plant defences to herbivory and a tri-trophic resistance through volatile chemical signalling.

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“…The taxa that bear the greatest responsibility for these insistent attacks are the vast array of insect herbivores (Farha-Rehman et al, 2010). Terrestrial plants and the insect herbivores that consume them have shared a long evolutionary history of ecological interaction.…”

Section: Introductionmentioning

confidence: 99%

Evidence that Treehoppers Induce Susceptibility of Oak Trees to Dietary Generalist Caterpillars

Comerford¹

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Lab group for helping me with field collections and colony care. Thanks to A. Agrawal for technical advice. Thanks to A. Burke and J. Coolon for being on the thesis committee and providing comments. A special thanks to M. Bernardo for helping me navigate the laboratory and to R. Clark for all the hours he spent guiding me through the statistics. Finally, my complete admiration and thanks to M. S. Singer for his guidance, support and unwavering patience over the past three years. Funding for this project came from Wesleyan University.

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Plant Defenses Against Insect Herbivory

Cited by 5 publications

References 63 publications

The Resistant Soybean-Aphis glycines Interaction: Current Knowledge and Prospects

The Resistant Soybean-Aphis glycines Interaction: Current Knowledge and Prospects

Assessment of aphid infestation levels in some cultivars of mustard with varying defensive traits

Evidence that Treehoppers Induce Susceptibility of Oak Trees to Dietary Generalist Caterpillars

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