Spread of Citrus Mosaic through Distribution of a New Clone of Satsuma Mandarin

Yamamoto, S.; Yamaguchi, A.

doi:10.5070/c59731f1vx

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…The CiMV strain is the causal pathogen of citrus mosaic disease, which is observed as mosaic-like mottling on satsuma mandarin fruit and is well known for 'Tora Miakan' (called for satsuma mandarin fruits with mosaic symptoms) riots that spread along with the early maturing satsuma mandarin 'Miyamoto Wase' (Imada 1977;Yamamoto and Yamaguchi 1980). Therefore, it was previously thought that trees with foliar symptoms of satsuma dwarf disease but without mosaic symptoms on the fruit were infected with the SDV strain, and that the occurrence of the CiMV strain was rare.…”

Section: Discussionmentioning

confidence: 99%

“…CiMV is reported to be the causative agent of mosaic disease, which produces non-persistent ringspots on the rinds of satsuma mandarin fruit (Iwanami et al 2001;Yamamoto and Yamaguchi 1980). During the maturation process, the entire fruit becomes colored and the mosaic symptoms are obscured, although the fruit surface becomes uneven and is accompanied by hardening of the rind and lengthwise fruit growth.…”

Section: Introductionmentioning

confidence: 99%

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Distribution and Soil Transmission of Satsuma Dwarf Virus Strains in Mie Prefecture, Japan

Nakajima,

Ichinokiyama,

Tomimura

et al. 2023

Preprint

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Satsuma dwarf virus (SDV) and its strains including citrus mosaic virus (CiMV), navel orange infectious mottling virus (NIMV), Natsusdaidai dwarf virus (NDV), and Hyuganatsu virus (HV), are known to cause severe damages to citrus trees. The occurrence of SDV strains was investigated in 69 citrus orchards in Mie Prefecture, Japan, in 2010–2012. Forty-three of the orchards contained citrus trees infected with strains of SDV. The CiMV strain occurred most frequently in Mie Prefecture, followed by the SDV strain. An isolate of the NIMV strain was detected at two orchards in Mie Prefecture. This is the second occurrence of NIMV in a field outside of the original field in Wakayama Prefecture, following an occurrence in Ehime Prefecture. This is the first report of combined CiMV and NIMV infection of citrus. Our results reveal that the CiMV strain is widely distributed outside Wakayama Prefecture. Moreover, isolates of the CiMV strain that barely induce mosaic symptoms on the fruit rind were found to be widely distributed. Because CiMV causes milder foliar symptoms than does SDV, it is considered that milder CiMV isolates are widespread in Mie Prefecture. Trifoliate orange seedlings were planted near infected citrus trees growing on trifoliate orange rootstocks, and soil-transmission of the SDV and CiMV strains occurred within 1 year of planting. Because trifoliate orange is widely used as a citrus rootstock, similar infections may occur in citrus plants grafted onto this rootstock in fields containing infected citrus trees.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution and Soil Transmission of Satsuma Dwarf Virus Strains in Mie Prefecture, Japan

Nakajima,

Ichinokiyama,

Tomimura

et al. 2023

Preprint

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“…The CiMV sub-strain is the causal pathogen of citrus mosaic disease, which is observed as mosaic-like mottling on satsuma mandarin fruit and is well known for the 'Tora Miakan' (e.g., satsuma mandarin fruit with mosaic symptoms) riots that spread along with the early maturing satsuma mandarin 'Miyamoto Wase' (Imada, 1977;Yamamoto and Yamaguchi, 1980). Therefore, it was previously believed that trees with foliar symptoms of satsuma dwarf disease but without mosaic symptoms on the fruit were infected with the SDV strain, whereas the occurrence of the CiMV sub-strain was considered rare.…”

Section: Locationmentioning

confidence: 99%

“…The characteristic symptom of the CiMV sub-strain is a green and yellow mosaic on the rind of the fruit at the color break period (Miyakawa and Yamaguchi, 1981;Yamada and Tanaka, 1968). The CiMV sub-strain is the causative agent of mosaic disease, which produces nonpersistent ring spots on the rind of satsuma mandarin fruit (Iwanami et al, 2001;Yamamoto and Yamaguchi, 1980). During the maturation process, the entire fruit becomes colored and the mosaic symptoms are obscured; however, the fruit surface becomes uneven and is accompanied by hardening of the rind and lengthwise fruit growth.…”

Section: Introductionmentioning

confidence: 99%

Distribution and infection rate of satsuma dwarf virus in Mie Prefecture, Japan

Nakajima,

Ichinokiyama,

Tomimura

et al. 2024

Ann. Rept. Kansai Pl. Prot.

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Strains of satsuma dwarf virus (SDV) occurring in Mie Prefecture were examined, and at the same time, the disease symptoms on the rind of citrus mosaic virus (CiMV) sub-strain were also examined. SDV-free trifoliate orange (Poncirus trifoliata (L.) Raf.) rootstocks were planted in plots where the SDV strain, the CiMV sub-strain, and the navel orange infectious mottling virus (NIMV) strain occur. The relationship between the SDV strain and the infection rate was determined. The CiMV sub-strain occurred most frequently in Mie Prefecture, followed by the SDV strain. An isolate of the NIMV strain was detected in two orchards in Mie Prefecture. This is the second occurrence of the NIMV strain recorded in a field outside of the original field in Wakayama Prefecture, following an occurrence in Ehime Prefecture. This is also the first report of mixed CiMV substrain and NIMV strain infection in citrus. The results indicate that the CiMV sub-strain is widely distributed outside Wakayama Prefecture. Moreover, isolates of the CiMV sub-strain, which hardly induce mosaic symptoms in the fruit rind, were widely distributed. Trifoliate orange seedlings were planted near infected citrus trees growing on trifoliate orange rootstocks. SDV infection occurred within one year of planting. Whether the difference in infection rate was caused by differences in viral strains or by environmental factors in the field remains unknown.

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“…i) Properties of CiMV CiMV typically induces the development of green blotches and ring-shaped spots on the fruit rind during coloration as well as delayed coloring of the affected areas (Miyakawa & Yamaguchi 1981, Yamada & Tanaka 1968). The disease caused by CiMV was considered to be an unknown fruit disorder until the late 1950s, when it was first described as a viral disease (Yamamoto & Yamaguchi 1980). Disease symptoms have been detected on the fruit of several species, including satsuma mandarin, lemon [Citrus limon (L.) Osbeck], and kinkoji (Citrus obovoidea hort.…”

Section: Taxonomy and Strainsmentioning

confidence: 99%

Major Citrus Viruses in Japan

Iwanami

2023

JARQ

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Citrus species grown in Japan are affected by three major viruses: satsuma dwarf virus (SDV), citrus tatter leaf virus (CTLV, apple stem grooving virus), and citrus tristeza virus (CTV). SDV has spread to other countries, such as China, Korea, and Turkey, apparently through unchecked budwoods and nursery trees; it is natural to assume that some of these contaminated plants harbored CTLV and CTV as well. Thus, citrus viruses in Japan are not only a domestic problem, they are also transboundary threats to agricultural production. This article reviews the occurrence and history of SDV, CTLV, and CTV in Japan as well as recent research developments in Japan and other countries.

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Spread of Citrus Mosaic through Distribution of a New Clone of Satsuma Mandarin

Cited by 4 publications

References 2 publications

Distribution and Soil Transmission of Satsuma Dwarf Virus Strains in Mie Prefecture, Japan

Distribution and Soil Transmission of Satsuma Dwarf Virus Strains in Mie Prefecture, Japan

Distribution and infection rate of satsuma dwarf virus in Mie Prefecture, Japan

Major Citrus Viruses in Japan

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