Interspecific Variation in Physiological and Metabolic Responses of five Species of Cymbopogon to Water Stress

Sangwan, Rajender S.; Farooqi, A. H. A.; Bansal, Renu; Singh-Sangwan, Neelam

doi:10.1016/s0176-1617(11)80408-6

Cited by 45 publications

(13 citation statements)

References 15 publications

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“…Citral content and citral yield were accordingly decreased by the applied levels of salinity, regardless of the lemongrass varieties (Table 5). Among the oil-bearing aromatic plants, stress-mediated changes in oil composition have been reported in the case of mint, sweet basil, and aromatic grasses (Simon et al 1992;Sangwan et al 1993). Ameliorating effect of SA on the essential oil content of lemongrass under salt stress has, however, not been reported previously.…”

Section: Discussionmentioning

confidence: 97%

Alleviation of salt stress in lemongrass by salicylic acid

et al. 2011

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Soil salinity is one of the key factors adversely affecting the growth, yield, and quality of crops. A pot study was conducted to find out whether exogenous application of salicylic acid could ameliorate the adverse effect of salinity in lemongrass (Cymbopogon flexuosus Steud. Wats.). Two Cymbopogon varieties, Krishna and Neema, were used in the study. Three salinity levels, viz, 50, 100, and 150 mM of NaCl, were applied to 30-day-old plants. Salicylic acid (SA) was applied as foliar spray at 10(-5) M concentration. Totally, six SA-sprays were carried out at 10-day intervals, following the first spray at 30 days after sowing. The growth parameters were progressively reduced with the increase in salinity level; however, growth inhibition was significantly reduced by the foliar application of SA. With the increase in salt stress, a gradual decrease in the activities of carbonic anhydrase and nitrate reductase was observed in both the varieties. SA-treatment not only ameliorated the adverse effects of NaCl but also showed a significant improvement in the activities of these enzymes compared with the untreated stressed-plants. The plants supplemented with NaCl exhibited a significant increase in electrolyte leakage, proline content, and phosphoenol pyruvate carboxylase activity. Content and yield of essential oil was also significantly decreased in plants that received salinity levels; however, SA overcame the unfavorable effects of salinity stress to a considerable extent. Lemongrass variety Krishna was found to be more adapted to salt stress than Neema, as indicated by the overall performance of the two varieties under salt conditions.

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Section: Discussionmentioning

confidence: 97%

Alleviation of salt stress in lemongrass by salicylic acid

et al. 2011

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“…Induction of PEP carboxylase in intact plants under drought stress was almost of the san:ie magnitude as that observed in excised leaves (Sangwan et aL, 19936). In Mesembryanthemum (Schmitt & Piepenbrock, 1992) and Sedum (Borland & Griffiths, 1992) induction of PFP carboxylase under mild environmental stress is functionally related to the ' C^-CAM switch'.…”

Section: D1 S C L" Ti S I O Nmentioning

confidence: 86%

“…Our previous studies have revealed that in excised leaves of Cymbopogon spp. short-term drought stress imposes certain physiological and metabolic perturbations including those on essential oil biogenesis (Sangwan et al, 19936). The present study was undertaken to discern whether the short-term water stress responses in detached leaves reflect the events that actually occur under prolonged drought stress m planta-The aspects of investigation included water relations, solute accumulation, essential oil biogenesis and catalytic activities of two important enzymes phosphoenoipyruvate (PEP) carboxylase and geraniol dehydrogenase (GeDH).…”

Section: N T K O D I" C To Nmentioning

confidence: 99%

Effect of drought stress on growth and essential oil metabolism in lemongrasses*

1994

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(Steud,) Wats, were grown under mild and moderate water stress for 45 and 90 d. The impact of in situ drought stress on plants in terms of relative water eontent, ^, concentration of proline, activities of PEP carboxylase and geranio! dehydrugenase, and geraniol and citral biogenesis, were investigated. The results revealed that the species exhibited differential responses under mild and moderate stress treatments. In general, plant growth was reduced considerably whilst the level of essential oils was maintained or enhanced. Significant induction in catalytic activity of PEP carboxylase under water stress was one of the consistent metabolic responses of the aromatic grasses. The major oil constituents, geraniol and citral, increased substantially in both the species. Activity of geraniol dehydrogenase was also modulated under moisture stress. The responses varied depending upon the level and duration of moisture stress. The observations have been analyzed in terms of possible relevance of some of these responses to their drought stress adaptability/tolerance.

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“…Thus, phylogenetic studies revealed tight groupings among the barley genotypes with some incongruities in position of genotypes. This inconsistency between the molecular and chemotypic variation observed among the cultivars in the present study suggests that genotype and environment interactions also led to the diversification of chemical constituents, rather than genotypic differences [27] [28].…”

Section: Relationships Among Barley Genotypesmentioning

confidence: 95%

Efficiency of Triple-SCoT Primer in Characterization of Genetic Diversity and Genotype-Specific Markers against SSR Fingerprint in Some Egyptian Barley Genotypes

Aboulila¹,

Mansour²

2017

AJMB

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Ten Egyptian barley genotypes (2 commercial varieties and 8 breeding lines) were cultivated under normal condition at the Experimental Farm of Sakha Agricultural Research station and exposed to salinity stress condition at the Experimental Farm of El-hosainia plain Agricultural Research station, Elsharkia Governorate, Egypt, in an attempt to identify the relative salinity tolerant genotypes. A susceptibility index (SI) was used to estimate the relative stress loss because it accounted for variation in yield potential and stress intensity. Giza 123, Line-1, Line-5, Line-6 and Line-8 genotypes were considered as saline tolerant genotypes on the basis of their highly tolerance indices values. Barley genotypes were characterized by seven SSR markers and three SCoT primers in different combinations to discern the extent of genetic variation and develop a fingerprinting key. Normal SCoT reactions amplify single segments of DNA which are 15-to 19-mer long. A new strategy was used to increase SCoT potential in genetic diversity studies by using two and three different primer combinations per reaction. Amplification products scored a polymorphism percentage of 94.44% for Triple-SCoT and 90.91% for SSR, while the average no. of polymorphic fragments/primer was 17 and 7.14 in the two marker systems, respectively. On the other side, Triple-SCoT exhibited the highest average number of positive and negative genotype-specific markers. The cluster analysis of the studied genotypes using these different marker systems revealed four dendrograms varied in their topology. The dendrogram based on Triple-SCoT data exhibited the closest relationships to those illustrated by SSR dendrogram.

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Interspecific Variation in Physiological and Metabolic Responses of five Species of Cymbopogon to Water Stress

Cited by 45 publications

References 15 publications

Alleviation of salt stress in lemongrass by salicylic acid

Alleviation of salt stress in lemongrass by salicylic acid

Effect of drought stress on growth and essential oil metabolism in lemongrasses*

Efficiency of Triple-SCoT Primer in Characterization of Genetic Diversity and Genotype-Specific Markers against SSR Fingerprint in Some Egyptian Barley Genotypes

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