Volatiles and hormones mediated root-knot nematode induced wheat defense response to foliar herbivore aphid

Shi, Jin‐Hua; Líu, Hao; Pham, The Cuong; Hu, Xinjun; Liu, Le; Wang, Chao; Foba, Caroline Ngichop; Wang, Shubo; Wang, Man‐Qun

doi:10.1016/j.scitotenv.2021.152840

Cited by 5 publications

(1 citation statement)

References 79 publications

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“…Medicago truncatula regulates the expression of sugar transport genes to modulate carbon allocation between the arbuscular mycorrhizal fungus Rhizophagus irregularis and the rhizobium Ensifer meliloti , adapting to different nutrient conditions (Kafle et al ., 2019). Also, plant‐mediated interactions between phloem‐feeding aphids and root‐parasitic nematodes have been investigated, revealing intricate mechanisms that involve various factors such as volatiles and hormones (Larson & Whitham, 1997; Heeren et al ., 2012; Hol et al ., 2016; Van Dam et al ., 2018; Shi et al ., 2022). However, the role of carbon allocation in such interactions between pests remains uncharted.…”

Section: Introductionmentioning

confidence: 99%

Brown planthopper infestation on rice reduces plant susceptibility to Meloidogyne graminicola by reducing root sugar allocation

Xiao,

Gheysen,

Yang

et al. 2024

New Phytologist

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Summary Plants are simultaneously attacked by different pests that rely on sugars uptake from plants. An understanding of the role of plant sugar allocation in these multipartite interactions is limited. Here, we characterized the expression patterns of sucrose transporter genes and evaluated the impact of targeted transporter gene mutants and brown planthopper (BPH) phloem‐feeding and oviposition on root sugar allocation and BPH‐reduced rice susceptibility to Meloidogyne graminicola. We found that the sugar transporter genes OsSUT1 and OsSUT2 are induced at BPH oviposition sites. OsSUT2 mutants showed a higher resistance to gravid BPH than to nymph BPH, and this was correlated with callose deposition, as reflected in a different effect on M. graminicola infection. BPH phloem‐feeding caused inhibition of callose deposition that was counteracted by BPH oviposition. Meanwhile, this pivotal role of sugar allocation in BPH‐reduced rice susceptibility to M. graminicola was validated on rice cultivar RHT harbouring BPH resistance genes Bph3 and Bph17. In conclusion, we demonstrated that rice susceptibility to M. graminicola is regulated by BPH phloem‐feeding and oviposition on rice through differences in plant sugar allocation.

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