Occurrence of<i>Phomopsis</i>sp. causing cankers on pecan trees in Buenos Aires province, Argentina

Noelting, María Cristina; Mantz, G.; Maiale, Santiago Javier; Molina, M. C.

doi:10.5197/j.2044-0588.2016.033.009

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…(Figure 1). These symptoms were identical to those previously reported in pecan plants in the southern Pampean region in Argentina (Noelting et al ., 2016; Mantz personal observation). In this area, Phomopsis spp.…”

Section: Discussionsupporting

confidence: 91%

“…The macroscopic symptoms and signs were morphologically identical to those already reported in pecan and different plant species infected with Phomopsis spp . (Uddin et al ., 1997; Reilly et al , 2010; Noelting et al ., 2016).…”

Section: Resultsmentioning

confidence: 99%

“…Phomopsis spp. isolate number 1219, which corresponds to the isolate described by Noelting et al . (2016), was obtained from the Instituto de Botánica “Carlos Spegazzini” belonging to the Universidad Nacional de La Plata , in Argentina.…”

Section: Methodsmentioning

confidence: 99%

“…The pecan plants, cv. Pawnee, analysed herein were obtained from a local nursery, and the cultivar is the same as that where the pathogen used in this study was isolated (Noelting et al ., 2016). The plants used as rootstock were produced from the pecan nut obtained from local plant seedlings and they were grown in a 10 L pot for two years.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Stem canker caused byPhomopsis spp. induces changes in polyamine levels and chlorophyll fluorescence parameters in pecan leaves

Mantz

Rossi

Viretto

et al. 2021

Preprint

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Pecan plants are attacked by the fungus Phomopsis spp. that causes stem canker, a serious and emerging disease in commercial orchards. Stem canker, which has been reported in several countries, negatively affects tree canopy health, eventually leading to production losses. The purpose of this study was to inquire into the physiology of pecan plants under stem canker attack by Phomopsis spp. To this end, pecan plants were inoculated with an isolate of Phomopsis spp. and several parameters, such as polyamines, proline, sugars, starch, chlorophyll fluorescence and canopy temperature were analysed. Under artificial inoculation, a high disease incidence was observed with symptoms similar to those in plants showing stem canker under field conditions. Furthermore, the infected stem showed dead tissue with brown necrotic discolouration in the xylem tissue. The free polyamines putrescine, spermidine, and spermine were detected and their levels decreased as leaves aged in the infected plants with respect to the controls. Chlorophyll fluorescence parameters, such as Sm, ψEO, and QbRC decreased under plant infection and therefore the K-band increased. Canopy temperature and proline content increased in the infected plants with respect to the controls while sugar content decreased. These data suggest that stem canker caused by Phomopsis spp. induces physiological changes that are similar to those observed in plants under drought stress. To our knowledge, this is the first study that documents the physiological and biochemical effects derived from pecan-Phomopsis interaction.

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Section: Discussionsupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Stem canker caused byPhomopsis spp. induces changes in polyamine levels and chlorophyll fluorescence parameters in pecan leaves

Mantz

Rossi

Viretto

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

Analysis of Carya cathayensis resistance to Botryosphaeria dothidea using grafting on pecan in China

Zhou

Fei

Huang³

et al. 2023

J Plant Pathol

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Stem canker caused by Phomopsis spp. Induces changes in polyamine levels and chlorophyll fluorescence parameters in pecan leaves

Mantz

Rossi

Viretto

et al. 2021

Plant Physiology and Biochemistry

View full text Add to dashboard Cite

Pecan plants are attacked by the fungus Phomopsis spp. that causes stem canker, a serious and emerging disease in commercial orchards. Stem canker, which has been reported in several countries, negatively affects tree canopy health, eventually leading to production losses. The purpose of this study was to inquire into the physiology of pecan plants under stem canker attack by Phomopsis spp. To this end, pecan plants were inoculated with an isolate of Phomopsis spp. and several parameters, such as polyamines, proline, sugars, starch, chlorophyll fluorescence and canopy temperature were analysed. Under artificial inoculation, a high disease incidence was observed with symptoms similar to those in plants showing stem canker under field conditions. Furthermore, the infected stem showed dead tissue with brown necrotic discolouration in the xylem tissue. The free polyamines putrescine, spermidine, and spermine were detected and their levels decreased as leaves aged in the infected plants with respect to the controls. Chlorophyll fluorescence parameters, such as Sm, ψ EO, and QbRC decreased under plant infection and therefore the K-band increased. Canopy temperature and proline content increased in the infected plants with respect to the controls while sugar content decreased. These data suggest that stem canker caused by Phomopsis spp. induces physiological changes that are similar to those observed in plants under drought stress. To our knowledge, this is the first study that documents the physiological and biochemical effects derived from pecan-Phomopsis interaction.

show abstract

Occurrence ofPhomopsissp. causing cankers on pecan trees in Buenos Aires province, Argentina

Cited by 5 publications

References 2 publications

Stem canker caused byPhomopsis spp. induces changes in polyamine levels and chlorophyll fluorescence parameters in pecan leaves

Stem canker caused byPhomopsis spp. induces changes in polyamine levels and chlorophyll fluorescence parameters in pecan leaves

Analysis of Carya cathayensis resistance to Botryosphaeria dothidea using grafting on pecan in China

Stem canker caused by Phomopsis spp. Induces changes in polyamine levels and chlorophyll fluorescence parameters in pecan leaves

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