Severe Diseases Induced by Viruses and Phytoplasmas in Hydrangea in Italy

Bertaccini, Assunta; Paltrinieri, Samanta; Contaldo, Nicoletta; Cavicchi, Lisa; Mori, Nozomu; Bellardi, M.G.

doi:10.17660/actahortic.2015.1072.11

Cited by 5 publications

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“…The results of this research shows that there is a tremendous need for further study of epidemiology of phytoplasma diseases in ornamental plants, especially considering the continuous increase of new symptomatic species (Davino et al, 2007;Paltrinieri et al, 2015). The 16SrI-B phytoplasmas identified in several ornamental plants in Italy were also detected in Laodelfax striatellus on hydrangea with virescence (Bertaccini et al, 2015), but no further information is available on insect vectors of these phytoplasmas in the different environments in which the infected samples were collected. It is also possible to hypothesize that given the genetic homogeneity of detected strains over two decades, the main mode of transmission is the vegetative propagation of asymptomatic infected materials.…”

Section: Discussionmentioning

confidence: 73%

“…All samples in this study were determined to be infected by aster yellows strains that after PCR/RFLP analyses on 16S rRNA gene were assigned to 16SrI-B subgroup ( of no plasma interaction with the environment including insect vectors. Considering the limited information available on insect vectors of phytoplasmas infecting ornamental plants in Italy and also worldwide, there is only a recent report of presence of aster yellows in Laodelfax striatellus detected on aster yellows infected hydrangeas (Bertaccini et al, 2015), it is very likely that the vegetative propagation of ornamental material could play an important role in maintaining the genetic homogeneity detected in the studied samples.…”

Section: Resultsmentioning

confidence: 97%

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Multilocus typing for characterization of ‘Candidatus Phytoplasma asteris’-related strains in several ornamental species in Italy

Paltrinieri¹,

Bellardi²,

Lesi³

et al. 2018

Acta Hortic.

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Different ornamental plants showing symptoms indicating phytoplasma presence were collected between 1993 and 2016 in various floricultural areas in north and south of Italy, including Sicily. These samples were determined to be infected by 'Candidatus Phytoplasma asteris'-related strains, and after PCR/RFLP identification based on the 16Sr RNA\gene were assigned to the 16SrI-B subgroup. These infected samples were employed for phytoplasma strain differentiation on tuf, groel, rp and amp genes. Phytoplasma strains were from hydrangea, primula, Centaurium erythraea, petunia and gerbera samples showing flower virescence; from gladiolus samples both in vivo and in micropropagation showing the "germs fins" symptomatology, from statice with stunting and lack of flower production, from ranunculus and carnation with virescence and malformation of flowers. All the genes were amplified in nested PCR except the amp gene. For the tuf gene all samples resulted amplified, and Tru1I RFLP analyses confirmed identical profiles with those of 16SrI group phytoplasmas. However, for the other genes only samples from ranunculus, gladiolus in vivo, statice and hydrangea were amplified. For these genes the phytoplasmas were identical to each other and to reference strains belonging to 16SrI-B subgroups; RFLP analyses with Tru1I and AluI further indicated placement in the rpI-B and GroELI-III groups. Considering that these samples have been collected in different Italian regions during 23 years, the relevant conservation in the studied genotypes can perhaps be linked to the presence of common leafhopper vectors, not always identified nor detected in the cultivation areas where the diseased plants were collected. It is important to highlight that 'Ca. P. asteris' is the prevalent phytoplasma reported in flower cultivations worldwide, and its lack of genetic polymorphisms may also indicate a globalized trading of the pathogen together with its propagation material.

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Section: Discussionmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 97%

Multilocus typing for characterization of ‘Candidatus Phytoplasma asteris’-related strains in several ornamental species in Italy

Paltrinieri¹,

Bellardi²,

Lesi³

et al. 2018

Acta Hortic.

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“…Viral diseases may have a significant impact on the appearance, health and market value of hydrangea, especially because it is propagated vegetatively and viruses are easily transmitted and accumulated over time through cuttings, causing a decline in the crop. Moreover, in recent years, emerging viral diseases in hydrangea with the capacity to cause more serious yield losses have been described; thus, in addition to phytoplasma diseases, they are considered a serious developing threat to hydrangea [ 3 ]. In total, fourteen viruses have been found to infect hydrangeas [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

A New Ilarvirus Found in French Hydrangea

Parrella

Troiano

2022

Plants

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In this study, a new virus was identified in French hydrangea plants, exhibiting chlorotic vein banding and necrotic ring spots on older leaves. The virus was mechanically transmitted to herbaceous hosts, in which it induced local and systemic or only local symptoms. The genome of the new virus was characterized and consisted of three RNA sequences that were 3422 (RNA 1), 2905 (RNA 2) and 2299 (RNA 3) nucleotides long, with five predicted open reading frames; RNA2 was bicistronic and contained conserved domains and motifs typical of ilarviruses. The phylogenetic analysis of the predicted proteins—p1, p2a, p3a and p3b—revealed its close relationship to recognized members of subgroup 2 within the genus Ilarvirus. Homologous antiserum was effective in the detection of the virus in plant extracts and no cross reactions with two other distinct members of subgroup 2 were observed. Overall, the biological features, phylogenetic relationships and serological data suggest that this virus is a new member of the genus, for which we propose the name hydrangea vein banding virus (HdVBV).

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“…xanthoneura b) 1:Tamura & Komuro (1967), 2:Chiko & Godkin (1986), 3: Brierly & Lorentz (1957, 4:Yusa et al (2016), 5:Bertaccini et al (1992), 6: Takinami et al (2013, 7:Kanehira et al (1996), 8: Sawayanagi et al (1999), 9: Takikawa et al (2008), 10: Ikeda et al (2009), 11: Shirata et al (1984), 12: Ji et al (2007), 13: Kusumoto et al (2009), 14: Nagashima et al (2021a, b), 15: Yosilia et al (2020, 16: USDA ARS (2022), 17:Yasuda (1911), 18: Zhang et al (1997), 19: Togashi & Onuma (1934), 20: Yoshinaga (1905), 21: Zhuang (1983), 22: Harada & Fujita (1998), 23: Miura (1957), 24: Kobayashi (1977a, b), 25: Raabe (1965), 26: Raabe (1967), 27: Endo (1964), 28: Arai (1996), 29: Bang et al (2001), 30: Rivera et al (2004), 31: Garibaldi et al (2017), 32: Whiteside (1966), 33: Horie & Kobayashi (1984), 34: Shin & Braun (2000, 35:Gautam et al (2020), 36: Williams & Liu (1976), 37: Yamamoto & Maeda (1960), 38: Yamamoto & Yasumori (1960, 39:Katsuki (1949), 40:Thompson & Johnston (1953), 41:Wiehe (1953), 42: Yamamoto (1936), 43: Yoshikawa & Yokoyama (1992, 44:Bakhshi et al (2015), 45:Groenewald et al (2013), 46: Togashi & Katsuki (1952, 47:Moriwaki et al (2003), 48: Sawada (1943a, b), 49: Tsukamoto & Katsuki (1959), 50: Johnston (1960, 51:Kasuyama & Idei (1987), 52: Sobers (1966), 53: Thaung (2008), 54: Zhu et al (2020, 55:Yokoyama & Tsubaki (1974), 56:Bertaccini et al (2015), 57:Kobayashi (1970), 58: Braun & Cook (2012, 59:Nomura & Tanda (1985), 60:Nakamura (1970), 61: Chiba & Teramoto (1952), 62: Aoshima & Kobayashi (1983), 63: Hirata (1956), 64: Yarwood & Gardner (1970), 65: Seki & Hirata (1961), 66: Homma & Hirata (1968), 67: Takahashi (2000, 68:Hara (1918), 69: Park et al (2012), 70: Tanda (1997), 71: Tanda (1999), 72: Orieux & Felix (1968), 73: Hirata & Wada (1973), 74: Horie et al (1997), 75: Tanda et al (1973), 76: Garibaldi et al (2006), 77: Takano (1994), 78: Koenig (1973), 79: Ikeda et al (2010), 80: Motohashi et al (2009), 81: Hara (1930), 82: Miura (1962), 83: Cho et al (2018), 84: Meeboon & Takamatsu (2015, 85:Wanasiri et al (2020), 86: Okane & Kakishima (1991), 87: Ogawa (1996, 88:Kakishima & Sato (1981), 89: Hiratsuka & Chen (1991), 90: Matsumura (1904), 91: Hiratsuka (1927), 92: Nasu & Kunoh (1987), 93: Guo (1989, 94:Zhuang & Wei (1994), 95: Zhuang (2005, 96:Liang et al (2006), 97: Sat...…”

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confidence: 99%

Hydrangea Diseases in Japan

NAGASHIMA

Tojo²

2023

JARQ

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The genus Hydrangea comprises 70-80 species, some of which have economic importance as flowering plants. Japan has at least 71 hydrangea diseases and approximately one-third of the world's recorded hydrangea diseases. A large number of hydrangea diseases in Japan are known primarily due to the long history of disease studies since 1892, and the pathogen diversity caused by Japan's high humidity and temperature ranges. Recently, new diseases have been found in several high-value cultivars that have been grown as potted plants in greenhouses in Japan. Such growing environments with high humidity and temperature may have enhanced development of the new diseases. An overall risk assessment is needed to ensure proper management of both old and new diseases of hydrangeas. This review lists all known hydrangea diseases recorded in Japan, compared them to global records, and reveals the diversity as well as the uniqueness of the diseases in the country. In addition, eight diseases, i.e., ring spot, bacterial leaf spot, stem and root rot, powdery mildew, gray mold, leaf spot/ stem rot, anthracnose, and leaf spot, which are currently problematic in Shimane Prefecture, Japan, are addressed based on four features: 1) symptoms, 2) distribution, 3) occurrence, and 4) control.

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Severe Diseases Induced by Viruses and Phytoplasmas in Hydrangea in Italy

Cited by 5 publications

References 0 publications

Multilocus typing for characterization of ‘Candidatus Phytoplasma asteris’-related strains in several ornamental species in Italy

Multilocus typing for characterization of ‘Candidatus Phytoplasma asteris’-related strains in several ornamental species in Italy

A New Ilarvirus Found in French Hydrangea

Hydrangea Diseases in Japan

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