Evaluation of lemon cultivars and acid lime × lemon hybrids for resistance to Xanthomonas axonopodis pv. citri

Prasad, M. B. N. V.; Singh, Roopali; Rekha, A.; Chand, Ramesh

doi:10.1016/s0304-4238(97)00108-8

Cited by 14 publications

(8 citation statements)

References 3 publications

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“…were grapefruit (C. paradisi), sweet orange (C. sinensis), Clementine mandarin (C. clementina), and sweet Lime (C. aurantifolia), which are acknowledged as having greater susceptibility compared with other species, as shown in previous studies (1,19). In contrast, among the most resistant species of citrus were manda- rin (C. reticulata), Satsuma mandarin (C. unshiu), and lemon (C. limon), which also confirms previous reports (1,19,43,47). However, it should also be pointed out that a few genotypes of C. sinensis were more resistant than some genotypes of C. reticulata, C. unshiu, and C. limon, and some genotypes of C. sinensis were as susceptible as C. paradisi, C. clementina, and C. aurantifolia (Table 1).…”

Section: Discussionsupporting

confidence: 87%

“…However, due to some species and hybrids being represented by only a single genotype, some caution should be taken when making assumptions about the relative susceptibilities of different species, although the results are in agreement with those previously reported for Citrus spp. (1,10,19,43,47).…”

Section: Discussionmentioning

confidence: 99%

“…citri (15,35,47), although it has not been explored previously where CLM is a problem; the experiments reported compared genotypes in the presence of CLM. These data provide an assessment of susceptibility of different Citrus spp.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of Resistance to Asiatic Citrus Canker Among Different Genotypes of Citrus in a Long-Term Canker-Resistance Field Screening Experiment in Brazil

et al. 2015

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

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Comparison of Resistance to Asiatic Citrus Canker Among Different Genotypes of Citrus in a Long-Term Canker-Resistance Field Screening Experiment in Brazil

et al. 2015

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“…(Williamson and Kumar, 2006). Prasad et al, (1997) claimed Rough lemon and Trifoliate orange as resistant rootstocks against T. semipenetrans but the results of the present study contradict this claim in the case of Rough lemon but were in accordance in case of Trifoliate orange. Rootstocks responding differently against T. semipenetrans shows that there is one foremost gene or a multiple tandem gene participating in the development of resistance against T. semipenetrans.…”

Section: Discussioncontrasting

confidence: 84%

Synergism of citrus nematode (Tylenchulus semipenetrans Cobb.) and Colletotrichum gloeosporioides plays a major role in citrus dieback

Afzal¹

2021

PAKJAS

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Citrus is known as a major fruit due to its high nutritional value and adaptability in tropical and sub-tropical regions. Among diseases, citrus dieback is one of the most threatening diseases in which overall plant growth is reduced. Major causes are Colletotrichum gloeosporioides and citrus nematode (Tylenchulus semipenetrans) with 15-35% losses all over the world. Plant material was established adopting sanitary measures in earthen pots (12-inch diameter). Fresh culture of C. gloeosporioides and T. semipenetrans was prepared for the inoculation by following the standard procedures. In the first set, rootstocks were inoculated with 200mL of water having spore suspension of C. gloeosporioides while in in the second set, inoculation of T. semipenetrans was done by using 45 mL of water suspension having 2000 freshly hatched juveniles per pot, while at the rate of 1 × 107 spores/mL per plant. In the third set, the interaction of C. gloeosporioides and T. semipenetrans was studied by inoculating selected citrus rootstocks by both pathogens. After four months of inoculation, data were recorded on plant disease index (PDI) along with plant growth parameters (root weight, shoot weight, shoot weight, shoot length and number of leaves). Trifoliate orange and cox mandarin hybrid showed resistance against the development of T. semipenetrans while rough lemon, C-35 Citrange and sour orange were found susceptible. There was a significant difference in plant growth parameters between inoculated and healthy plants. Root weight and shoot weight decreased by 8.98g and 11.53g, while root length and shoot length decreased by 7.29cm and 13.5cm respectively as compared to control treatments in most susceptible rootstocks. Per cent Branch Infection (PBI) and per cent Disease Index (PDI) were maximum (71.52, 37) per cent on rough lemon respectively. Results regarding combined inoculation of C. gloeosporioides and T. semipenetrans showed that there was a significant difference in plant growth parameters between inoculated and healthy plants. In rough lemon, Root weight and shoot weight decreased by 13.86 and 20.57g respectively in diseased and healthy plants. Root length and shoot length decreased by 8.37 and 20.04cm respectively as compared to control treatments in most susceptible rootstocks. Overall results depicted that inoculation of both pathogens reduced plant growth more severely as compared to their individual application.

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“…There are other reports from Florida of C. medica displaying susceptibility to ACC (Gottwald et al, 1993), which is in agreement with our study. A Pakistani report indicated that most lemons (C. limon, which are C. medica hybrids, and were highly susceptible in our study) were resistant to all but one isolate of Xcc tested (Prasad et al, 1997). A second report from Pakistan also indicated that the one C. maxima accession tested displayed no ACC symptoms (Sarkar et al, 2007).…”

Section: Resultssupporting

confidence: 59%

Incidence and Severity of Asiatic Citrus Canker on Diverse Citrus and Citrus-related Germplasm in a Florida Field Planting

Stover¹,

Driggers²,

Richardson³

et al. 2014

horts

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Xanthomonas citri ssp. citri (Xcc) is the causal agent of Asiatic citrus canker (ACC), a commercially important disease in Florida citrus as well as in many other regions. In this study we evaluated occurrence of foliar lesions from ACC on progenies of 94 seed-source genotypes (hereafter called “parent genotypes”) of Citrus and Citrus relatives in the field in east–central Florida to identify the relative susceptibility to ACC. Eight seedlings per parent genotype were planted in a randomized complete block planting, but the number of plants assessed in some genotype groups was reduced by mortality at some or all sampling dates. Plants experienced ambient exposure to high Xcc inoculum pressure and plants were assessed in Sept. 2010, July 2011, Oct. 2011, May 2012, and Sept. 2012. The incidence and severity of ACC lesions were assessed and evaluated using non-parametric analyses to compare progeny from the 94 parent genotypes. Progeny of 14 parent genotypes did not exhibit ACC symptoms at any date. All were in genera other than Citrus with only Microcitrus and Eremocitrus being cross-compatible with Citrus. The kumquat hybrid C. halimii, two accessions of C. reticulata, C. nobilis, and C. sunki were the only Citrus species in the group that had a low severity (percent total leaf area showing symptoms) on each date of assessment. The aforementioned accessions had an average incidence and severity of ACC lesions of less than 4% in 2011 and 2012, but 26% to 38% in 2010 when no chemical control for ACC was applied in the adjoining citrus groves at our field site. Fourteen of the 16 progeny of C. reticulata and related parent genotypes were in the group with the lowest incidence and severity of ACC on two or more assessment dates. However, for analysis of only the most symptomatic leaves on each plant, 10 C. reticulata parent genotype progenies were in the most resistant category on the Sept. 2012 assessment despite having a low incidence and severity of ACC symptoms overall. Progeny of Poncirus and its hybrids as well as those of C. maxima, C. limon, and related species were the most severely diseased at all assessment dates. There were few instances in which progeny of different accessions of the same species had markedly different responses to ACC: progeny of C. reticulata ‘Fremont’ displayed more severe ACC compared with several other C. reticulata groups and C. aurantium ‘Zhuluan’ displayed much lower incidence and severity of ACC compared with several other accessions designated C. aurantium. Information on ACC susceptibility in diverse Citrus and Citrus relatives may prove useful for breeding programs aimed at reducing ACC susceptibility and will be of value to researchers interested in mechanisms of ACC resistance and susceptibility.

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Evaluation of lemon cultivars and acid lime × lemon hybrids for resistance to Xanthomonas axonopodis pv. citri

Cited by 14 publications

References 3 publications

Comparison of Resistance to Asiatic Citrus Canker Among Different Genotypes of Citrus in a Long-Term Canker-Resistance Field Screening Experiment in Brazil

Comparison of Resistance to Asiatic Citrus Canker Among Different Genotypes of Citrus in a Long-Term Canker-Resistance Field Screening Experiment in Brazil

Synergism of citrus nematode (Tylenchulus semipenetrans Cobb.) and Colletotrichum gloeosporioides plays a major role in citrus dieback

Incidence and Severity of Asiatic Citrus Canker on Diverse Citrus and Citrus-related Germplasm in a Florida Field Planting

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