Adaptive responses of Aerva javanica Burm.f. Shult. to severe aridity in the Egyptian deserts

Salama, F. M.; El-Ghani, Monier M. Abd; El-Tayeh, Noha; Amro, Ahmed; El-Naggar, Sara

doi:10.21608/ejbo.2018.2557.1144

Cited by 3 publications

(6 citation statements)

References 23 publications

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“…This causes high osmotic pressure to increment the specific heat of cell sap to control high desert temperatures. Phosphates exhibited in few amounts in A. javanica may be due to the fast integration of phosphates into plant metabolism or rarity of phosphates in the soil; these results concur with Salama et al [8]. The canonical correspondence analysis (CCA) biplot of soil variables analyzed by CCA showed that fine sand, Mg, PO 4 , silt and clay, moisture, fine sand, and salinity were the principal features affecting the frequency of A. javanica plants in the study area.…”

Section: Discussionsupporting

confidence: 90%

“…The canonical correspondence analysis (CCA) biplot of soil variables analyzed by CCA showed that fine sand, Mg, PO 4 , silt and clay, moisture, fine sand, and salinity were the principal features affecting the frequency of A. javanica plants in the study area. This has been studied in other related studies [8,54]. Meanwhile, the cluster analysis of ISSR polymorphism showed that populations 7-10 are grouped in one distinct cluster and share similar geographical areas impacted by the environmental conditions and geographical locations.…”

Section: Discussionmentioning

confidence: 74%

“…The ecophysiological properties of Aerva javanica in two tributaries of Wadi Qena (Wadi El-Atrash and Wadi El-Ghuza) in the Egyptian Eastern Desert revealed that chlorophyll contents, soluble sugars, and soluble proteins increased during summer while total free amino acids were higher during winter. Close relationships were found between the high K, Ca, and Cl contents and the hot-dry conditions predominating in the summer season [8].…”

Section: Introductionmentioning

confidence: 84%

“…A correlation of soil properties and vegetation characteristics was determined in different studies in large areas indicating remarkable gradient pointing to soil properties [12,13]. Few studies have been made on the effect of edaphic factors and the structure of vegetation in semiarid environments and focused mainly on the preponderance of the physical characters of the soil [8,14,15].…”

Section: Introductionmentioning

confidence: 99%

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Association of Morphological, Ecological, and Genetic Diversity of Aerva javanica Populations Growing in the Eastern Desert of Egypt

et al. 2020

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Aerva javanica is one of Egypt’s most important traditional medicinal plants used as antidiarrheal and anthelmintic medicine and recently as an anticancer agent. In this study, variations among ten populations of Aerva javanica in different sites in the Eastern Desert of Egypt were analyzed based on morphological and ecological attributes and molecular variation expressed by Inter-Simple Sequence Repeat (ISSR) markers. Morphological diversity was higher for populations in the Wadi El-Markh and Bir Abbady regions than others. The polymorphism revealed by ten ISSR primers was 79.4% among populations. Distance trees created using the results obtained from soil variables, morphological characterizations, and molecular data showed that the highest similarity was 0.974 between Populations 8 and 9, while the lowest similarity was 0.715 between Population 1 and Population 3 regions. In conclusion, the obtained data are important to design a plan for sustainable conservation of Aerva javanica as an important medicinal plant having a wide interspecific genetic variability within various populations.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Association of Morphological, Ecological, and Genetic Diversity of Aerva javanica Populations Growing in the Eastern Desert of Egypt

et al. 2020

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“…The ecological environments surrounding plant species are mostly heterogeneous, creating ecological variables that influence plant development along the prevailing environmental gradients (Bazzaz, 1996). Many ecologists have emphasized the response of a given species to these variations in environmental factors (Hegazy et al, 2010;Salama et al, 2018). Even within the same habitat, some microhabitats have high environmental variability affecting the persistence of species and demography of populations (Levine et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Habitat variations affect morphological, reproductive and some metabolic traits of Mediterranean Centaurea glomerata Vahl populations

Hassan

Tammam

Galal

et al. 2020

Heliyon

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Centaurea glomerata Vahl is an annual, monoecious and herbaceous member of Asteraceae, found in some localities of different topographic features/habitat conditions along the Mediterranean coastal region of Egypt. This study aimed to investigate some environmental gradients including edaphic and climate criteria on morphological, reproductive traits as well as phenolic and flavonoid metabolites in this species. Three distinct populations were selected. Two of them were located in coastal sand dunes (found in Rosetta region in Egypt); one was located on flat sand dunes, whereas the other grown on sloping ones. Meanwhile, the third population was represented in the rocky hillside of Burg El Arab region. The population detected in the sloping sand dunes showed best morphological and reproductive features, whilst the opposite was true for that represented on the rocky hillside. Moreover, the free phenolic and flavonoid compounds prevailed in the later. The meteorological data revealed that the rocky hillside received relatively lower minimum temperature and higher solar irradiance, while the sand dunes of Rosetta showed more warmer conditions. Light intensity and wind speed were reduced on the sloping sand dunes. The Canonical Correspondence Analysis (CCA) exhibited a clear correlation between most of metabolites detected and the population found on the rocky hillside along with higher solar irradiance prevails. The morpho-reproductive traits were related to climatic gradients and some soil criteria. These results revealed that the changes in micro-topography, that may lead to change in soil and climate variables, is the most important environmental gradient that controls the morphological and biochemical features of C. glomerata. Solar irradiance and/or light intensity are key factors playing a role influencing the measured traits of this species. These findings suggest that accumulation of secondary metabolites could be a biochemical strategy and an adaptational criterion for such species under stress conditions.

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Seasonal Variation in the Secondary Metabolites and Antimicrobial Activity of Plantago major L. from Egyptian Heterogenic Habitats

et al. 2022

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Egyptian Journal of Botany http://ejbo.journals.ekb.eg/ 20 P LANTAGO major has been used to treat various diseases since ancient times. The present study aimed to assess the seasonal and habitat-related variations in the secondary metabolite content and antimicrobial activity of P. major leaf extracts. Eight habitats were selected for sampling plants in four seasons. The phytochemical screening of the ethanolic and chloroform extracts of P. major leaves from different habitats in different seasons showed the presence of cardiac glycosides, flavonoids, and phenolics. The highest cardiac glycoside and total flavonoid contents were observed in urban habitats and cultivated crops during winter, whereas the highest total phenolic content was observed in fallow lands during summer. Compounds separated and identified using high-performance liquid chromatography included phenolics such as ellagic acid, catechol, resorcinol, gallic acid, and phloroglucinol and flavonoids such as apigenin, luteolin, chrysoeriol, rutin, quercetin, kaempferol, and avicularin. The methanolic extracts of P. major leaves showed higher antimicrobial activity than aqueous and ethanolic extracts; the methanolic extract of P. major leaves from canal banks showed the highest activity against P. aeruginosa, followed by that from orchards against S. aureus. The results suggest that P. major contains phenolics and flavonoids that have potential medicinal applications. Moreover, the antimicrobial activity of the methanolic extract differed with habitat. Therefore, the present study confirms previously reported findings and indicates that the phytochemical contents and antimicrobial activity of the plant extracts differed with environmental factors (habitat and season). In future studies, the phytochemicals with antimicrobial activity need to be extracted, separated, purified, identified, and tested as pure or mixed compounds.

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Adaptive responses of Aerva javanica Burm.f. Shult. to severe aridity in the Egyptian deserts

Cited by 3 publications

References 23 publications

Association of Morphological, Ecological, and Genetic Diversity of Aerva javanica Populations Growing in the Eastern Desert of Egypt

Association of Morphological, Ecological, and Genetic Diversity of Aerva javanica Populations Growing in the Eastern Desert of Egypt

Habitat variations affect morphological, reproductive and some metabolic traits of Mediterranean Centaurea glomerata Vahl populations

Seasonal Variation in the Secondary Metabolites and Antimicrobial Activity of Plantago major L. from Egyptian Heterogenic Habitats

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