Effects of Methyl Jasmonate and an Endophytic Fungus on Plant Resistance to Insect Herbivores

2008 ◽  
Vol 34 (12) ◽  
pp. 1511-1517 ◽  
Author(s):  
Lacy Simons ◽  
Thomas L. Bultman ◽  
T. J. Sullivan
Keyword(s):  
Methyl Jasmonate ◽  
Plant Resistance ◽  
Endophytic Fungus ◽  
Insect Herbivores

scholarly journals Plant Resistance to Insect Herbivores: A Field Test of the Environmental Stress Hypothesis

Ecology ◽  
1992 ◽  
Vol 73 (1) ◽  
pp. 153-169 ◽  
Author(s):  
Svata M. Louda ◽  
Sharon K. Collinge
Keyword(s):  
Environmental Stress ◽  
Field Test ◽  
Plant Resistance ◽  
Insect Herbivores

scholarly journals Plasticity in Induced Resistance to Sequential Attack by Multiple Herbivores in Brassica Nigra

2021 ◽  
Author(s):  
Maite Fernández de Bobadilla ◽  
Roel Van Wiechen ◽  
Gerrit Gort ◽  
Erik H. Poelman
Keyword(s):  
Induced Resistance ◽  
Plant Resistance ◽  
Brassica Nigra ◽  
Plant Responses ◽  
Insect Herbivores ◽  
Plant Fitness ◽  
Feeding Guild ◽  
Induced Plant Responses ◽  
Negative Effect ◽  
History Of

Abstract In nature, plants interact with multiple insect herbivores that may arrive simultaneously or sequentially. Because insect herbivores often have a negative effect on plant fitness, plants have evolved mechanisms to defend their tissues from being eaten. There is extensive knowledge on the regulation of induced plant responses to single or dual attack. However, we lack information on how plants defend against the attack of multiple herbivores that arrive sequentially. In this study, we investigated whether Brassica nigra plants are able to defend themselves against caterpillars of the late arriving herbivore Plutella xylostella, when plants had been previously exposed to sequential attack by four other herbivores. We manipulated the order of arrival and the history of attack by four herbivores to investigate which patterns in sequential herbivory determine resistance against the fifth attacker. We recorded that history of sequential herbivore attack differentially affected the capability of Brassica nigra plants to defend themselves against larvae of P. xylostella. A sequence of attack with four episodes of attack by P. xylostella induced resistance to larvae of P. xylostella. The number of times the plant was attacked by herbivores of the same feeding guild, the identity of the first attacker, the identity and the guild of the last attacker as well as the order of attackers within the sequence of multiple herbivores influenced plant resistance to subsequent herbivory. In conclusion, this study shows that history of sequential attack is an important factor determining plant resistance to herbivores.

Role of silicon in regulating plant resistance to insect herbivores

2012 ◽  
Vol 32 (3) ◽  
pp. 974-983
Author(s):  
韩永强 HAN Yongqiang ◽  
魏春光 WEI Chunguang ◽  
侯茂林 HOU Maolin
Keyword(s):  
Plant Resistance ◽  
Insect Herbivores

scholarly journals Plasticity in induced resistance to sequential attack by multiple herbivores in Brassica nigra

Oecologia ◽  
2021 ◽  
Author(s):  
Maite Fernández de Bobadilla ◽  
Roel Van Wiechen ◽  
Gerrit Gort ◽  
Erik H. Poelman
Keyword(s):  
Induced Resistance ◽  
Plant Resistance ◽  
Plutella Xylostella ◽  
Myzus Persicae ◽  
Brassica Nigra ◽  
Insect Herbivores ◽  
Feeding Guild ◽  
Athalia Rosae ◽  
Herbivore Attack ◽  
History Of

AbstractIn nature, plants interact with multiple insect herbivores that may arrive simultaneously or sequentially. There is extensive knowledge on how plants defend themselves against single or dual attack. However, we lack information on how plants defend against the attack of multiple herbivores that arrive sequentially. In this study, we investigated whether Brassica nigra L. plants are able to defend themselves against caterpillars of the late-arriving herbivore Plutella xylostella L., when plants had been previously exposed to sequential attack by four other herbivores (P. xylostella, Athalia rosae, Myzus persicae and Brevicoryne brassicae). We manipulated the order of arrival and the history of attack by four herbivores to investigate which patterns in sequential herbivory determine resistance against the fifth attacker. We recorded that history of sequential herbivore attack differentially affected the capability of B. nigra plants to defend themselves against caterpillars of P. xylostella. Caterpillars gained less weight on plants attacked by a sequence of four episodes of attack by P. xylostella compared to performance on plants that were not previously damaged by herbivores. The number of times the plant was attacked by herbivores of the same feeding guild, the identity of the first attacker, the identity and the guild of the last attacker as well as the order of attackers within the sequence of multiple herbivores influenced the growth of the subsequent herbivory. In conclusion, this study shows that history of sequential attack is an important factor determining plant resistance to herbivores.

scholarly journals Pleiotropic effect of theFlowering Locus Con plant resistance and defence against insect herbivores

2017 ◽  
Vol 106 (3) ◽  
pp. 1244-1255 ◽  
Author(s):  
Sergio Rasmann ◽  
Julia Sánchez Vilas ◽  
Gaétan Glauser ◽  
Maria Cartolano ◽  
Janne Lempe ◽  
...  
Keyword(s):  
Plant Resistance ◽  
Pleiotropic Effect ◽  
Insect Herbivores

scholarly journals Endophyte Infection and Methyl Jasmonate Treatment Increased the Resistance of Achnatherum sibiricum to Insect Herbivores Independently

Toxins ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 7 ◽  
Author(s):  
Junhua Qin ◽  
Man Wu ◽  
Hui Liu ◽  
Yubao Gao ◽  
Anzhi Ren
Keyword(s):  
Methyl Jasmonate ◽  
Interaction Effect ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Soluble Sugar ◽  
Negative Regulator ◽  
Total Phenolic ◽  
Insect Herbivores ◽  
Pal Activity ◽  
Endophyte Infection

Alkaloids are usually thought to be responsible for protecting endophyte-infected (EI) grasses from their herbivores. For EI grasses that produce few alkaloids, can endophyte infection enhance their resistance to herbivores? Related studies are limited. In the Inner Mongolian steppe, Achnatherum sibiricum is highly infected by Epichloë endophytes, but produces few alkaloids. Locusts are the common insect herbivores of grasses. In this study, A. sibiricum was used as plant material. Methyl jasmonate (MJ, when applied exogenously, can induce responses similar to herbivore damage) treatment was performed. The effects of endophyte infection and MJ treatment on the resistance of A. sibiricum to Locusta migratoria were studied. We found that locusts preferred EF (endophyte-free) plants to EI plants in both choice and no-choice feeding experiments. Endophyte infection enhanced the resistance of A. sibiricum to locusts. Endophyte infection decreased soluble sugar concentrations, while it increased the total phenolic content and phenylalanine ammonia lyase (PAL) activity, which may contribute to the resistance of A. sibiricum to locusts. There was an interaction effect between MJ treatment and endophyte infection on the growth of the host. MJ treatment was a negative regulator of the plant growth-promoting effects of endophyte infection. There was no interaction effect between MJ treatment and endophyte infection on the defense characteristics of the host. In groups not exposed to locusts, MJ treatment and endophyte infection had a similar effect in decreasing the soluble sugar content, while increasing the total phenolic content and the PAL activity. In groups exposed to locusts, the effect of MJ treatment on the above characteristics disappeared, while the effect of endophyte infection became more obvious. All of these results suggest that even for endophytes producing few alkaloids, they could still increase the resistance of native grasses to insect herbivores. Furthermore, endophyte infection might mediate the defense responses of the host, independent of jasmonic acid (JA) pathways.

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