Identification of ‘<i><scp>C</scp>andidatus</i> phytoplasma ziziphi’ associated with persimmon (<i><scp>D</scp>iospyros kaki </i><scp>T</scp>hunb.) fasciation in <scp>C</scp>hina

Wang, J.; Gao, Rui; Yu, Xianmei; An, M.; Qin, Zhenkui; Liu, J.; Ai, Chengxiang

doi:10.1111/efp.12194

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…The 'Ca. P. ziziphi' species includes strains from a homogenous ecological lineage (Wang et al, 2018a), although isolates with less than 99.7% variation on their 16S rRNA sequence have been associated to similar stem fasciation of persimmon trees in China (Wang et al, 2015a). Also, Indian16SrV-B isolates infecting peach differ from 'Ca.…”

Section: Intraspecific Diversitymentioning

confidence: 99%

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Pest categorisation of the non‐EU phytoplasmas of Cydonia Mill., Fragaria L., Malus Mill., Prunus L., Pyrus L., Ribes L., Rubus L. and Vitis L.

Bragard¹,

Dehnen‐Schmutz²,

Gonthier³

et al. 2020

EFS2

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Following a request from the European Commission, the EFSA Panel on Plant Health performed a pest categorisation of nine phytoplasmas of Cydonia Mill., Fragaria L., Malus Mill., Prunus L., Pyrus L., Ribes L., Rubus L. and Vitis L. (hereafter "host plants") known to occur only outside the EU or having a limited presence in the EU. This opinion covers the (i) reference strains of 'Candidatus Phytoplasma australiense', 'Ca. P. fraxini', 'Ca. P. hispanicum', 'Ca. P. trifolii', 'Ca. P. ziziphi', (ii) related strains infecting the host plants of 'Ca. P. aurantifolia', 'Ca. P. pruni', and 'Ca. P. pyri', and (iii) an unclassified phytoplasma causing Buckland valley grapevine yellows. Phytoplasmas can be detected by available methods and are efficiently transmitted by vegetative propagation, with plants for planting acting as a major entry pathway and a long-distance spread mechanism. Phytoplasmas are also transmitted in a persistent and propagative manner by some insect families of the Fulgoromorpha, Cicadomorpha and Sternorrhyncha (order Hemiptera). No transovarial, pollen or seed transmission has been reported. The natural host range of the categorised phytoplasmas varies from one to more than 90 plant species, thus increasing the possible entry pathways. The host plants are widely cultivated in the EU. All the categorised phytoplasmas can enter and spread through the trade of host plants for planting, and by vectors. Establishment of these phytoplasmas is not expected to be limited by EU environmental conditions. The introduction of these phytoplasmas in the EU would have an economic impact. There are measures to reduce the risk of entry, establishment, spread and impact. Uncertainties result from limited information on distribution, biology and epidemiology. All the phytoplasmas categorised here meet the criteria evaluated by EFSA to qualify as potential Union quarantine pests, and they do not qualify as potential regulated non-quarantine pests, because they are non-EU phytoplasmas.

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Section: Intraspecific Diversitymentioning

confidence: 99%

“…The ‘Lizao’ and ‘Dongzao’ jujube varieties appear to be susceptible to phytoplasma infection (Tian et al., 2000; Peng et al., ). Production of phytoplasma‐free plants of Chinese jujube can be achieved by cryopreservation (Wang et al., ,)…”

Section: Appendix D – Impacts On Other Natural Hostsmentioning

confidence: 99%

Pest categorisation of the non‐EU phytoplasmas of Cydonia Mill., Fragaria L., Malus Mill., Prunus L., Pyrus L., Ribes L., Rubus L. and Vitis L.

Bragard¹,

Dehnen‐Schmutz²,

Gonthier³

et al. 2020

EFS2

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“…Flat stem often manifests as thickened and banded stems, disordered leaves, and abnormal in orescence development, affecting plants' normal growth and development. At present, the occurrence of at-stem disease has been reported in multiple countries and occurred on a variety of broad-leaved trees, including Sophora japonica (Liu et al 2022), Amorpha fruticose (Huang et al 2023), and Persimmon (Wang et al 2017), etc. It also affects herbaceous plants such as Corn (Duduk and Bertaccini 2006), Cucumber (Wang et al 2022), Arabidopsis thaliana (Bressan and Purcell 2005; Cettul and Firrao 2011), etc.…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Molecular Mechanisms Underlying Flat Stem Formation in Atractylodes lancea in Response to Phytoplasmas

Gong,

Chen,

Huang

et al. 2024

Preprint

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Atractylodes lancea (Thunb.) DC has been widely used as a medicinal herb for centuries. However, long-term artificial cultivation of A. lancea led to serious plant diseases, such as the flat branch disease caused by phytoplasmas. To explore the formation mechanism of flat stems, we measured the changes in physiological and biochemical indicators and related metabolic pathways in stems of A. lancea in response to phytoplasma. After infection by pathogen, significant changes were observed in the content of stress compounds H2O2 and MDA, as well as the activities of antioxidant enzymes APX, POD, PPO, and CAT. The contents of jasmonic acid and zeatin in the flat stem (FS) of A. lancea increased significantly, while auxin content decreased. High-throughput sequencing showed that differentially expressed genes (DEGs) are enriched in hormone biosynthesis, signal transduction, Ca2+ signaling, and other pathways. These results preliminary elucidate the molecular mechanism of flat stem development in A. lancea, providing a foundation for disease prevention in the future.

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Updates on phytoplasma diseases associated with fruit crops in Asia

Mitra¹,

Serçe²,

Gazel³

et al. 2023

Phytoplasma Diseases of Major Crops, Trees, and Weeds

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Identification of ‘Candidatus phytoplasma ziziphi’ associated with persimmon (Diospyros kaki Thunb.) fasciation in China

Cited by 6 publications

References 8 publications

Pest categorisation of the non‐EU phytoplasmas of Cydonia Mill., Fragaria L., Malus Mill., Prunus L., Pyrus L., Ribes L., Rubus L. and Vitis L.

Pest categorisation of the non‐EU phytoplasmas of Cydonia Mill., Fragaria L., Malus Mill., Prunus L., Pyrus L., Ribes L., Rubus L. and Vitis L.

Unraveling the Molecular Mechanisms Underlying Flat Stem Formation in Atractylodes lancea in Response to Phytoplasmas

Updates on phytoplasma diseases associated with fruit crops in Asia

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