Comparative analysis of the responses to water stress in eggplant (Solanum melongena) cultivars

Plazas, Mariola; Nguyen, Huu Trong; González-Orenga, Sara; Fita, Ana; Vicente, Óscar; Prohens, Jaime; Boscaiu, Mónica

doi:10.1016/j.plaphy.2019.08.031

Cited by 52 publications

(45 citation statements)

References 69 publications

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“…In addition, for each agromorphological character, drought tolerance scores of parental accessions and F 1 hybrid progenies were significantly different. Thus it appears, as reported by other authors, that effects of water deficit on plants are organ dependent (Tambe, Kusalkar, Shinde, & Shinde, 2019) and genotype dependent (Delfin et al, 2013;Plazas, Vilanova, et al, 2016;Plazas et al, 2019;Tani et al, 2018). Interspecific hybrids MEL1 × INS2, MEL4 × INS3, MEL6 × ANG1, and MEL6 × DAS1, as well as the accession SIS1, exhibited drought tolerance with respect to vegetative growth traits and floral characteristics.…”

Section: Discussionsupporting

confidence: 72%

“…(2018) obtained different reactions of two eggplant genotypes subjected to separate and simultaneous effects of drought and infection by the pathogenic fungus Verticillium dahliae , whereas Plazas et al. (2019) found differences in the physiological and biochemical response to drought stress of four eggplant cultivars. In addition, Plazas, Rahma, Rodríguez‐Burruezo, Prohens, and Fita (2016) identified accessions of the wild species S. anguivi Lam.…”

Section: Introductionmentioning

confidence: 99%

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Genetic parameters of drought tolerance for agromorphological traits in eggplant, wild relatives, and interspecific hybrids

Kouassi

Sylla

et al. 2020

Crop Science

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Crop wild relatives (CWRs) have barely been used in eggplant (Solanum melongena) breeding. However, introgression breeding may help in coping with the challenges posed by climate change. During the rainy and dry seasons, we evaluated nine accessions of eggplant, nine accessions of seven related species (of which six are CWRs and one is a cultivated relative), and 12 interspecific hybrids. Drought tolerance scores, calculated as ratios of growing rates and ratios of mean values during the rainy and dry seasons, were obtained for vegetative growth and yield‐related traits. Considering the vegetative growth and yield‐related traits evaluated, the F1 hybrid progenies of eggplant with S. insanum MEL1 × INS2 and MEL4 × INS3, S. anguivi MEL6 × ANG1, and S. dasyphyllum MEL6 × DAS1, plus the S. sysimbriifolium accession SIS1, displayed drought tolerance. Small to large gaps were observed between phenotypic and genotypic CVs of drought tolerance scores, reflecting variable influence of environmental factors on drought tolerance of the traits evaluated. In addition, the narrow‐sense heritability was generally moderate, indicating that genes with dominance and/or epistasis effects may be involved in the expression of drought tolerance. High genotypic correlations for drought tolerance scores between pairs of traits such as branching index and leaf length, leaf petiole diameter and plant height, number of stamens per flower, and fruit pedicel length suggest that drought tolerance of these traits is controlled by genes that are in linkage disequilibrium and/or have pleiotropic effects. The results are relevant for the development of drought‐tolerant cultivars of eggplant.

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Section: Discussionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Genetic parameters of drought tolerance for agromorphological traits in eggplant, wild relatives, and interspecific hybrids

Kouassi

Sylla

et al. 2020

Crop Science

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“…Eggplant is a glycophyte and, as such, responds to increased salinity by a reduction in growth parameters and yield, being generally considered as moderately sensitive (or moderately resistant) to salt stress [7,17,31,32], as other cultivated species of the same genus [33]. However, this crop is characterised by a large variation of phenotypical, biochemical, and physiological traits, which is related to differences between cultivars in their responses to biotic [34] or abiotic stresses, including drought and salinity [35][36][37]. Therefore, the use of more stress-tolerant cultivars of eggplants on marginal lands or on salinised soils is a realistic challenge for the future, considering that global warming is generating an increased rate of secondary salinisation [38].…”

Section: Discussionmentioning

confidence: 99%

“…On the contrary, Pro can be directly involved in the mechanisms of tolerance to stress, so that higher contents correlate with higher tolerance [40]. Comparative analyses of different eggplant cultivars have provided mixed results; in some cases, the more stress-tolerant genotypes accumulated higher Pro concentrations [35,36,60], but in other studies, higher levels were found in the more sensitive ones [32]. Our results clearly showed higher Pro levels in S. insanum than in S. melongena in all experimental conditions, but especially in the presence of the highest salinity tested, 300 mM NaCl, thus correlating with the relative salt tolerance of the two investigated species.…”

Section: Discussionmentioning

confidence: 99%

Physiological and Biochemical Responses to Salt Stress in Cultivated Eggplant (Solanum melongena L.) and in S. insanum L., a Close Wild Relative

et al. 2020

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Eggplant (Solanum melongena) has been described as moderately sensitive to salinity. We characterised the responses to salt stress of eggplant and S. insanum, its putative wild ancestor. Young plants of two accessions of both species were watered for 25 days with an irrigation solution containing NaCl at concentrations of 0 (control), 50, 100, 200, and 300 mM. Plant growth, photosynthetic activity, concentrations of photosynthetic pigments, K+, Na+, and Cl− ions, proline, total soluble sugars, malondialdehyde, total phenolics, and total flavonoids, as well as superoxide dismutase, catalase, and glutathione reductase specific activities, were quantified. Salt stress-induced reduction of growth was greater in S. melongena than in S. insanum. The photosynthetic activity decreased in both species, except for substomatal CO2 concentration (Ci) in S. insanum, although the photosynthetic pigments were not degraded in the presence of NaCl. The levels of Na+ and Cl− increased in roots and leaves with increasing NaCl doses, but leaf K+ concentrations were maintained, indicating a relative stress tolerance in the two accessions, which also did not seem to suffer a remarkable degree of salt-induced oxidative stress. Our results suggest that the higher salt tolerance of S. insanum mostly lies in its ability to accumulate higher concentrations of proline and, to a lesser extent, Na+ and Cl−. The results obtained indicate that S. insanum is a good candidate for improving salt tolerance in eggplant through breeding and introgression programmes.

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“…Higher stress tolerance of eggplant wild relatives, compared to the cultivated species, is to be expected since they are often found in nature in arid or semiarid regions and in saline environments [45,46]. Nevertheless, it should be noted that the differences between the two species were relatively small and observed only at high external salinities (e.g., 300 mM NaCl) because the specific eggplant cultivar used in this work, MEL 1, seems to be also quite resistant to low and moderate salt concentrations [25], as well as to water stress [47]. Solanum melongena includes many varieties and commercial cultivars that differ considerably in their degree of salt tolerance [43].…”

Section: Discussionmentioning

confidence: 71%

Comparative Studies on the Physiological and Biochemical Responses to Salt Stress of Eggplant (Solanum melongena) and Its Rootstock S. torvum

et al. 2020

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This study investigated the physiological and biochemical responses to salinity stress of Solanum melongena and its wild relative, Solanum torvum, commonly used as eggplant rootstock. Young plants of both species were watered during 25 days with NaCl aqueous solutions at the following four final concentrations: 0 (for the controls), 100, 200, and 300 mM. Plant growth parameters, photosynthetic pigments content, monovalent ion concentrations in roots and leaves, leaf levels of osmolytes (proline and total soluble sugars), oxidative stress markers (MDA and H2O2), non-enzymatic antioxidants (total phenolic compounds and total flavonoids), and enzymatic antioxidant activities (superoxide dismutase, catalase, glutathione reductase) were determined after the stress treatments. Salt-induced growth reduction was more significant in S. melongena than in S. torvum, especially at high salt concentrations, indicating a (slightly) higher salt tolerance of the wild species. The mechanisms of tolerance of S. torvum were partly based on the active transport of toxic ions to the leaves at high external salinity and, presumably, a better capacity to store them in the vacuoles, as well as on the accumulation of proline to higher concentrations than in the cultivated eggplant. MDA and H2O2 contents did not vary in response to the salt treatments in S. torvum. However, in S. melongena, MDA content increased by 78% when 300 mM NaCl was applied. No activation of antioxidant mechanisms, accumulation of antioxidant compounds, or increase in the specific activity of antioxidant enzymes in any of the studied species was induced by salinity. The relatively high salt tolerance of S. torvum supports its use as rootstock for eggplant cultivation in salinized soils and as a possible source of salt-tolerance genes for the genetic improvement of cultivated eggplant.

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Comparative analysis of the responses to water stress in eggplant (Solanum melongena) cultivars

Cited by 52 publications

References 69 publications

Genetic parameters of drought tolerance for agromorphological traits in eggplant, wild relatives, and interspecific hybrids

Genetic parameters of drought tolerance for agromorphological traits in eggplant, wild relatives, and interspecific hybrids

Physiological and Biochemical Responses to Salt Stress in Cultivated Eggplant (Solanum melongena L.) and in S. insanum L., a Close Wild Relative

Comparative Studies on the Physiological and Biochemical Responses to Salt Stress of Eggplant (Solanum melongena) and Its Rootstock S. torvum

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