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1.
Mohamed Neji Mohamed Moncef Serbaji Olivier Hardy Mohamed Chaieb 《Arid Land Research and Management》2018,32(3):291-315
Knowledge about vegetation patterns along disturbance gradients is essential for conservation and management of coastal habitats in arid regions. This study focuses on the floristic diversity and the factors controlling the vegetation structure in the Gulf of Gabès (Tunisia). For this purpose, the floristic diversity of 120 relevés belonging to three coastal sites with different disturbance levels (40 relevés per site) was analyzed in relation with 10 environmental and anthropogenic factors. Therophytes constitute 54% of the 237 plants species belonging to 44 families identified in the present study. The species richness and floristic diversity indices exhibited a similar trend and peaked in the slightly disturbed site (H′?=?3.38; S?=?176). The similarity between sites was relatively low and reached its maximum between the little and the highly disturbed sites. Two-way indicator species analysis and detrended correspondence analysis applied on the floristic data resulted in groups mainly determined by disturbance level by explicitly segregating the three sites. Canonical correspondence analysis (CCA) indicated that the spatial pattern of species composition was mainly influenced by anthropogenic variables. Partial CCA revealed that the effect of anthropogenic variables on floristic composition was thrice higher than the effect of environmental variables (57.5% vs. 18.4%, respectively). Overall, this study provides a broad understanding of the floristic diversity and vascular plant richness in the Gulf of Gabès. The obtained results reflected a disturbance–diversity pattern and thus revealed the obvious importance of maintaining the intermediate disturbance for biodiversity conservation and monitoring. 相似文献
2.
Journal of Plant Diseases and Protection - The present study aimed to evaluate the effects of Zataria multiflora essential oil at different concentrations (0, 100, 200, 300 and 500 ppm) on the... 相似文献
3.
Najla Mezghani Holly Ruess Neji Tarchoun Jihene Ben Amor Philipp W. Simon David M. Spooner 《Genetic Resources and Crop Evolution》2018,65(5):1359-1368
Tunisia, other countries in northwestern Africa, and the Iberian Peninsula, represent a center of diversity of Daucus. The genus traditionally has included about 20–25 species worldwide, but a recent molecular study redefined and expanded Daucus to include representatives from nine other genera. By this classification, Daucus now contains about 40 species, with some of them having winged fruits in addition to its traditionally recognized spiny fruits. The taxonomy of Daucus in Tunisia has recently been studied with morphological data, concluding that D. carota subsp. capillifolius is a subspecies that co-occurs and crosses with subsp. carota. The present study extends these findings with additional data from Genotyping-by-Sequencing (GBS) from 33 Tunisian accessions of D. carota (93 individuals with two to three replicates per accession), including the first collections of subsp. gummifer from Tunisia. Placed in the context of additional GBS data, D. carota subsp. gummifer has separate origins from other collections of subsp. carota in Tunisia and/or immediately adjacent areas to the north in Italy or its surrounding islands. Our results add support to the utility of large SNP datasets for species-level phylogenetic studies in Daucus. 相似文献
4.
Mahmoudi Bizhan Fayazi Jamal Roshanfekr Hedayatollah Sari Mohsen Bakhtiarizadeh Mohammad Reza 《Veterinary research communications》2020,44(1):19-27
Veterinary Research Communications - Sub-acute ruminal acidosis is a type of metabolic disorder in which affected cattle show a considerable depression of rumen pH. This leads to a dramatic decline... 相似文献
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Neji Mohamed Geuna Filippo Gandour Mhemmed Hessini Kamel Taamalli Wael Abdelly Chedly 《Genetic Resources and Crop Evolution》2022,69(2):577-586
Genetic Resources and Crop Evolution - The genus Brachypodium is generally considered taxonomically difficult because of the high levels of phenotypic variation and frequent... 相似文献
7.
Hela Mahmoudi Raouia Ben Massoud Olfa Baatour Imen Tarchoune Imen Ben Salah Nawel Nasri 《Journal of plant nutrition》2013,36(12):1910-1922
Seeds of lettuce, variety Romaine were subjected to different priming treatments such as water, potassium nitrate (KNO3) and gibberellic acid (GA3). Seedlings obtained from primed (Pr) and nonprimed (NP) seeds were grown in a hydroponic culture system supplemented with 0, 100 or 200 mM sodium chloride (NaCl). The different physiological and biochemical responses were studied 15 days after treatment. Under NaCl, the dry weight was higher in plants derived from hydro-primed (HP) seeds when compared to NP, osmoprimed (KNO3P), and hormonal primed (GA3P) ones. Under control and 100 mM NaCl treatment, malondialdehyde (MDA) content and EL did not show any correlation with activities of gaiacol peroxidase (GPX) and catalase (CAT), but did with the increase in reduced ascorbate (AsA) and total ascorbate contents. The results indicated that plants derived from HP seeds exhibited higher adaptive potential under salinity stress. Our findings suggest that a hydropriming technique can be used as a simple commercial approach to alleviate the effects of NaCl induced stress in lettuce plants. 相似文献
8.
Nikookar SH Hajheydari Z Moosa-Kazemi SH Mahmoudi M Shahmohammadi S 《Pakistan journal of biological sciences: PJBS》2012,15(2):103-107
Dermatitis caused by stimulation of beetle paederus, is a common health problem in Northern and some southern parts of Iran. Since by now, traditional medicine and some corticosteroid agents have been used for treatment of dermatitis caused by beetle paederus. Because, there are few researches about classical treatment of the disease at academic level, this study planned to compare the effectiveness of triamcinolone ointment and atorvastatin tablet with placebo in treatment ofpaederus dermatitis in Northern Iran. A randomized double-blind clinical trial was carried out on 30 patients referred to the hospital and clinics at Sari and Neka countries in Northern Iran during 6 months. Patients were randomly divided into two therapeutic equal groups. The first group was triamcinolone ointment twice a day and a placebo atorvastatin tablet daily. The second group was oral atorvastatin one tablet (20 mg) daily and a placebo triamcinolone ointment twice a day. In Seventh day of visits, therapeutic response of the patients in triamcinolone and atorvastatin group were 93.33 and 80%, respectively. No significant differences were found in therapeutic outcome between the two groups (p > 0.05). The results showed both oftriamcinolone ointment and oral atorvastatin had similar effect on paederus dermatitis. Because the paederus dermatitis is a self-limited disease use of topical therapy for treatment of the disease is recommend. 相似文献
9.
Animos Lamare Arman Mahmoudi Otaghvari Satyawada Rama Rao 《Genetic Resources and Crop Evolution》2017,64(6):1241-1251
The genus Musa L. comprises of economically important bananas and has been divided into five sections based on their chromosome number and morphological characteristics viz., Australimusa, Callimusa, Eumusa, Rhodochlamys and Ingentimusa. However, this sectional classification has long been disputed. In this study, we present data on sequenced multiple DNA fragments from the maternally inherited chloroplast genome (atpB-rbcL spacer, trnK-matK intron and psbK-psbI spacer) and the biparentally inherited internal transcribed spacers of nuclear ribosomal DNA of three species of Musa along with data available in GenBank database to understand their implications on the sectional relationship and phylogeny of the genus Musa. In our findings, none of the five sections of Musa previously defined based on morphology was recovered in the molecular phylogeny analysis using cpDNA and nrDNA. Instead, the results corroborate with the suggestion that sectional classification in the genus Musa should be reviewed by combining together the section Eumusa and Rhodochlamys as one and section Australimusa and Callimusa as a single different section, along with that of Ingentimusa. 相似文献
10.
Laboratory studies were conducted to determine the effects of Trioxys angelicae Haliday (Hym.: Braconidae) age and host density (Aphis fabae Scopoli) (Hem.: Aphididae) on selected attributes of parasitoid reproductive biology. The number of hosts parasitized per
day was used as an estimate of wasp fecundity. Parasitoid longevity was not affected by host density and at host densities
of 2, 4, 6, 8, 10, 15, 20, 30, 40 or 60 aphids per day; the parasitoids lived an average of 8.96 ± 0.82 days at 21°C. At host
densities of ≤20 aphids per day, lifetime fecundity of a single Trioxys angelicae female was limited by the number of hosts available. Lifetime fecundity was highest with an average of 158.14 ± 20.33 at
a density of 30 aphids per day; the maximum number of aphids parasitized by any female was 235. Daily fecundity and sex ratio
were affected by parasitoid age and host density. Age-specific fecundity at different host densities fitted well to a nonlinear
model. In conclusion, the fecundity and female progeny production of Trioxys angelicae as an important biological control agent of A. fabae is influenced by host availability. 相似文献