Whiteflies weaponize a plant defense via horizontal gene transfer

Whiteman, Noah K.; Tarnopol, Rebecca L.

doi:10.1016/j.cell.2021.03.017

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…In agreement with this, whiteflies feeding on transgenic tomato plants that express small interfering RNAs targeting BtPMaT1 are unable to survive [43]. Thus, whiteflies harnessed a plant gene which allows them to thwart plant defenses and was perhaps essential in the evolution of these hemipterans towards becoming generalist herbivores [43,55].…”

Section: Functional Impact Of Plant Genes In Insectsmentioning

confidence: 77%

Sidestepping Darwin: horizontal gene transfer from plants to insects

Gilbert

Maumus

2023

Current Opinion in Insect Science

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Section: Functional Impact Of Plant Genes In Insectsmentioning

confidence: 77%

Sidestepping Darwin: horizontal gene transfer from plants to insects

Gilbert

Maumus

2023

Current Opinion in Insect Science

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“…Regulation of transcription level is the most studied and most important regulation strategy in organisms ( Lowe et al., 2017 ; Paul et al., 2022 ). In plants exposed to insect feeding stress, defense signaling pathways are initiated, a series of physiological and biochemical reactions are induced, and expression of defense genes is activated ( Whiteman and Tarnopol, 2021 ). The physiological and biochemical metabolism of plants is altered through signal transduction, transcriptional regulation, and gene expression, which improves the resistance of plants to pest stress ( Du et al., 2020 ; Wani et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Physiological responses and transcriptome analysis of Hemerocallis citrina Baroni exposed to Thrips palmi feeding stress

Sun,

Shen,

Chen

et al. 2024

Front. Plant Sci.

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Thrips are serious pests of Hemerocallis citrina Baroni (daylily), affecting crop yield and quality. To defend against pests, daylily has evolved a set of sophisticated defense mechanisms. In the present study, induction of systemic resistance in Hemerocallis citrina ‘Datong Huanghua’ by Thrips palmi feeding was investigated at both biochemical and molecular levels. The soluble sugar content of daylily leaves was significantly lower than that in control check (CK) at all time points of feeding by T. palmi, whereas the amino acid and free fatty acid contents started to be significantly lower than those in CK after 7 days. Secondary metabolites such as tannins, flavonoids, and total phenols, which are harmful to the growth and reproduction of T. palmi, were increased significantly. The activities of defense enzymes such as peroxidase (POD), phenylalanine ammonia lyase (PAL), and polyphenol oxidase (PPO) were significantly increased, and the degree of damage to plants was reduced. The significant increase in protease inhibitor (PI) activity may lead to disrupted digestion and slower growth in T. palmi. Using RNA sequencing, 1,894 differentially expressed genes (DEGs) were identified between control and treatment groups at five timepoints. DEGs were mainly enriched in secondary metabolite synthesis, jasmonic acid (JA), salicylic acid (SA), and other defense hormone signal transduction pathways, defense enzyme synthesis, MAPK signaling, cell wall thickening, carbohydrate metabolism, photosynthesis, and other insect resistance pathways. Subsequently, 698 DEGs were predicted to be transcription factors, including bHLH and WRKY members related to biotic stress. WGCNA identified 18 hub genes in four key modules (Purple, Midnight blue, Blue, and Red) including MYB-like DNA-binding domain (TRINITY_DN2391_c0_g1, TRINITY_DN3285_c0_g1), zinc-finger of the FCS-type, C2-C2 (TRINITY_DN21050_c0_g2), and NPR1 (TRINITY_DN13045_c0_g1, TRINITY_DN855_c0_g2). The results indicate that biosynthesis of secondary metabolites, phenylalanine metabolism, PIs, and defense hormones pathways are involved in the induced resistance to T. palmi in daylily.

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“…[21][22][23][24] The whitefly Bemisia tabaci (Gennadius) is one of the most devastating crop pests, causing serious crop yield reductions by transmitting plant viruses, feeding on phloem sap, and excreting honeydew. [25][26][27] B. tabaci is a species complex of at least 30 cryptic species, 28 among which the Mediterranean (MED) is highly invasive and has become distributed worldwide. 29,30 B. tabaci MED is distributed in almost all areas of China, including many cities located in northern China, while the other cryptic of B. tabaci species are less distributed in these regions.…”

Section: Introductionmentioning

confidence: 99%

“…The whitefly Bemisia tabaci (Gennadius) is one of the most devastating crop pests, causing serious crop yield reductions by transmitting plant viruses, feeding on phloem sap, and excreting honeydew 25–27 . B. tabaci is a species complex of at least 30 cryptic species, 28 among which the Mediterranean (MED) is highly invasive and has become distributed worldwide 29,30 .…”

Section: Introductionmentioning

confidence: 99%

Silencing of catalase reduces unfavorable low‐temperature tolerance capacity in whiteflies

Ning,

Liang,

et al. 2024

Pest Management Science

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BACKGROUNDTemperature is a primary factor that determines the eco‐geographical distribution and population development of invasive insects. Temperature stress leads to various negative effects, including excess reactive oxygen species (ROS), and catalase (CAT) is a key enzyme against ROS in the antioxidant pathway. The whitefly Bemisia tabaci MED is a typical invasive pest that causes damage worldwide. Our previous studies have shown that CAT promotes whitefly adaptation to high temperature by eliminating ROS. However, the mechanism underlying the low‐temperature adaptation of whiteflies is still unknown.RESULTSIn this study, we investigated the role of CAT in the low‐temperature tolerance of B. tabaci MED by analyzing its survival rate, reproduction, and ROS levels at 25 °C (as a control, suitable temperature), 20 °C (moderately decreased temperature), and 4 °C (severely decreased temperature). Silencing of BtCAT1, BtCAT2, or BtCAT3 reduced the viability of whiteflies under a short‐term severely decreased temperature (4 °C), which manifested as decreases in survival and fecundity accompanied by significant increases in ROS levels. Moreover, even at a moderately decreased temperature (20 °C), silencing of BtCAT1 led to high ROS levels and low survival rates in adults.CONCLUSIONSilencing of BtCATs significantly increased the sensitivity of B. tabaci MED to low temperatures. BtCAT1 is likely more essential than other BtCATs for low‐temperature tolerance in whiteflies.This article is protected by copyright. All rights reserved.

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Whiteflies weaponize a plant defense via horizontal gene transfer

Cited by 6 publications

References 8 publications

Sidestepping Darwin: horizontal gene transfer from plants to insects

Sidestepping Darwin: horizontal gene transfer from plants to insects

Physiological responses and transcriptome analysis of Hemerocallis citrina Baroni exposed to Thrips palmi feeding stress

Silencing of catalase reduces unfavorable low‐temperature tolerance capacity in whiteflies

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