Novel Mechanism for Resistance to Colorado Potato Beetle (Coleoptera: Chrysomelidae) in Wild Solanum Species

1997 ◽  
Vol 90 (2) ◽  
pp. 689-696 ◽  
Author(s):  
Evans Sikinyi ◽  
David J. Hannapel ◽  
Paula M. Imerman ◽  
H. M. Stahr
Keyword(s):  
Colorado Potato Beetle ◽  
Solanum Species ◽  
Wild Solanum Species ◽  
Potato Beetle ◽  
Wild Solanum

scholarly journals The presence of Phytophthora infestans in the rhizosphere of a wild Solanum species may contribute to off-season survival and pathogenicity

2020 ◽  
Vol 148 ◽  
pp. 103475 ◽  
Author(s):  
Ramesh R. Vetukuri ◽  
Laura Masini ◽  
Rebecca McDougal ◽  
Preeti Panda ◽  
Levine de Zinger ◽  
...  
Keyword(s):  
Phytophthora Infestans ◽  
Solanum Species ◽  
Wild Solanum Species ◽  
Wild Solanum

scholarly journals A Test of Taxonomic Predictivity: Resistance to Early Blight in Wild Relatives of Cultivated Potato

2008 ◽  
Vol 98 (6) ◽  
pp. 680-687 ◽  
Author(s):  
S. H. Jansky ◽  
R. Simon ◽  
D. M. Spooner
Keyword(s):  
Breeding System ◽  
Early Blight ◽  
Cladistic Analysis ◽  
Solanum Species ◽  
Morphological Data ◽  
Blight Resistance ◽  
Wild Solanum Species ◽  
Group Breeding ◽  
Mold Resistance ◽  
Wild Solanum

Host plant resistance offers an attractive method of control for early blight (caused by the foliar fungus Alternaria solani), a widespread disease that appears annually in potato crops worldwide. We tested the assumed ability of taxonomy to predict the presence of early blight resistance genes in wild Solanum species for which resistance was observed in related species. We also tested associations to ploidy, crossing group, breeding system, and geography. As in a prior study of Sclerotinia sclerotiorum (white mold) resistance, tremendous variation for resistance to early blight was found to occur within and among species. There was no discernable relationship between the distribution of resistant phenotypes and taxonomic series (based on an intuitive interpretation of morphological data), clade (based on a cladistic analysis of plastid DNA data), ploidy, breeding system, geographic distance, or climate parameters. Species and individual accessions with high proportions of early blight resistant plants were identified, but high levels of inter- and intra-accession variability were observed. Consequently, the designation of species or accessions as resistant or susceptible must take this variation into account. This study calls into question the assumption that taxonomic or geographic data can be used to predict sources of early blight resistance in wild Solanum species.

scholarly journals Ethylene Differentially Modulates Hypoxia Responses and Tolerance across Solanum Species

Plants ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1022 ◽  
Author(s):  
Sjon Hartman ◽  
Nienke van Dongen ◽  
Dominique M.H.J. Renneberg ◽  
Rob A.M. Welschen-Evertman ◽  
Johanna Kociemba ◽  
...  
Keyword(s):  
Crop Production ◽  
Potato Cultivar ◽  
Solanum Species ◽  
Marker Genes ◽  
Agricultural Crop ◽  
Vegetable Crops ◽  
Waterlogging Tolerance ◽  
Wild Solanum Species ◽  
Hypoxia Acclimation ◽  
Wild Solanum

The increasing occurrence of floods hinders agricultural crop production and threatens global food security. The majority of vegetable crops are highly sensitive to flooding and it is unclear how these plants use flooding signals to acclimate to impending oxygen deprivation (hypoxia). Previous research has shown that the early flooding signal ethylene augments hypoxia responses and improves survival in Arabidopsis. To unravel how cultivated and wild Solanum species integrate ethylene signaling to control subsequent hypoxia acclimation, we studied the transcript levels of a selection of marker genes, whose upregulation is indicative of ethylene-mediated hypoxia acclimation in Arabidopsis. Our results suggest that ethylene-mediated hypoxia acclimation is conserved in both shoots and roots of the wild Solanum species bittersweet (Solanum dulcamara) and a waterlogging-tolerant potato (Solanum tuberosum) cultivar. However, ethylene did not enhance the transcriptional hypoxia response in roots of a waterlogging-sensitive potato cultivar, suggesting that waterlogging tolerance in potato could depend on ethylene-controlled hypoxia responses in the roots. Finally, we show that ethylene rarely enhances hypoxia-adaptive genes and does not improve hypoxia survival in tomato (Solanum lycopersicum). We conclude that analyzing genes indicative of ethylene-mediated hypoxia acclimation is a promising approach to identifying key signaling cascades that confer flooding tolerance in crops.

Screening of wild Solanum rootstock to manage dry root rot disease (Macrophomina phaseolina) in brinjal

1970 ◽  
pp. 34
Author(s):  
J. Sherly, R. Renuka
Keyword(s):  
Root Rot ◽  
Disease Incidence ◽  
Macrophomina Phaseolina ◽  
Solanum Species ◽  
Wild Solanum Species ◽  
Root Rot Disease ◽  
House Condition ◽  
Rot Disease ◽  
Cent Disease ◽  
Wild Solanum

Five wild Solanum species were screened against dry root rot disease in glass house condition with commonly cultivated brinjal as control. The disease was scored at different day’s interval on 30th, 45th and 60th days after planting (DAP). Among the wild species screened and evaluated the species S. torvum was observed without any disease incidence i.e (0). The least per cent of disease incidence was observed in S. incanum (38.60%) which was followed by S. xanthocarpum (42.80%), S. viarum (64.20%) and CO2 (78.50 %) susceptible check at 30 DAP. Secondary metabolites were analysed from both wild and control plants. Based on the per cent disease incidence values S. torvum was graded as ‘Resistant’ against M. phaseolina and can be recommended as a best rootstock for brinjal under varying climatic condition especially where the dry climate prevails.

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