Characterization of phenolic compounds in mature Moroccan Medjool date palm fruits ( Phoenix dactylifera ) by HPLC-DAD-ESI-MS

2018 ◽  
Vol 70 ◽  
pp. 63-71 ◽  
Author(s):  
Farid Khallouki ◽  
Irvila Ricarte ◽  
Andrea Breuer ◽  
Robert W. Owen
Keyword(s):  
Phenolic Compounds ◽  
Date Palm ◽  
Phoenix Dactylifera ◽  
Esi Ms ◽  
Palm Fruits

Development and characterization of polyvinyl alcohol filled with date palm midrib powder

2021 ◽  
pp. 089270572110633
Author(s):  
Yunusa Umar ◽  
SK Manirul Haque ◽  
Mamdouh Al-Harthi ◽  
Zakariya Sadique ◽  
Omar Ashwaq ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Date Palm ◽  
Tensile Modulus ◽  
Phoenix Dactylifera ◽  
Filler Loading ◽  
Phoenix Dactylifera L ◽  
Inverse Effect ◽  
Solution Casting Method ◽  
Thermal Stability Of

Date palm ( Phoenix dactylifera L) is one of the most widely cultivated crops in different parts of Saudi Arabia. The midribs rich in cellulose, hemicellulose, and lignin are often burnt in the farms, causes severe environmental problems. In the present study, date palm midrib (DPM), these waste materials were powdered and incorporated into polyvinyl alcohol (PVA). Composites were prepared by varying the DPM loading (0–10 wt%) using the solution casting method. Tensile and thermal properties were analyzed for the composites with respect to filler loading. Addition of DPM as filler enhanced the tensile modulus while an inverse effect was observed in the elongation values. Differential scanning calorimeter (DSC) analysis showed a gradual increase in melting temperature (Tm) and crystallinity values for PVA. Thermogravimetric analysis (TGA) indicated that the incorporation of DPM into PVA can increase the thermal stability of PVA. Morphology of the composites were performed using scanning electron microscopy (SEM).

scholarly journals PYL8 ABA receptors of Phoenix dactylifera play a crucial role in response to abiotic stress and are stabilized by ABA

2020 ◽  
Author(s):  
Irene Garcia-Maquilon ◽  
Alberto Coego ◽  
Jorge Lozano-Juste ◽  
Maxim Messerer ◽  
Carlos de Ollas ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Molecular Mechanisms ◽  
Date Palm ◽  
Biochemical Characterization ◽  
Soil Water Potential ◽  
Phoenix Dactylifera ◽  
Aba Signaling ◽  
Abiotic Stress Response ◽  
Aba Receptors

Abstract The identification of those prevalent abscisic acid (ABA) receptors and molecular mechanisms that trigger drought adaptation in crops well adapted to harsh conditions such as date palm (Phoenix dactylifera, Pd) sheds light on plant–environment interactions. We reveal that PdPYL8-like receptors are predominantly expressed under abiotic stress, with Pd27 being the most expressed receptor in date palm. Therefore, subfamily I PdPYL8-like receptors have been selected for ABA signaling during abiotic stress response in this crop. Biochemical characterization of PdPYL8-like and PdPYL1-like receptors revealed receptor- and ABA-dependent inhibition of PP2Cs, which triggers activation of the pRD29B-LUC reporter in response to ABA. PdPYLs efficiently abolish PP2C-mediated repression of ABA signaling, but loss of the Trp lock in the seed-specific AHG1-like phosphatase PdPP2C79 markedly impairs its inhibition by ABA receptors. Characterization of Arabidopsis transgenic plants that express PdPYLs shows enhanced ABA signaling in seed, root, and guard cells. Specifically, Pd27-overexpressing plants showed lower ABA content and were more efficient than the wild type in lowering transpiration at negative soil water potential, leading to enhanced drought tolerance. Finally, PdPYL8-like receptors accumulate after ABA treatment, which suggests that ABA-induced stabilization of these receptors operates in date palm for efficient boosting of ABA signaling in response to abiotic stress.

Screening of antioxidant activity and phenolic compounds of various date palm (Phoenix dactylifera) fruits from Algeria

2011 ◽  
Vol 5 (2) ◽  
pp. 119-126
Author(s):  
Ghiaba Zineb ◽  
Mustapha Boukouada ◽  
Amar Djeridane ◽  
Mohktar Saidi ◽  
Mohamed Yousfi
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Date Palm ◽  
Phoenix Dactylifera

DATE PALM AND DATE PALM INFLORESCENCES IN THE LATE URUK PERIOD (C. 3300 B.C.): BOTANY AND ARCHAIC SCRIPT

Iraq ◽  
2019 ◽  
Vol 81 ◽  
pp. 221-239
Author(s):  
Marcin Z. Paszke
Keyword(s):  
Date Palm ◽  
Root Zone ◽  
Phoenix Dactylifera ◽  
Scientific Data ◽  
Phenotypic Traits ◽  
Palm Tree ◽  
Archaeological Data ◽  
Phoenix Dactylifera L ◽  
Artificial Fertilization ◽  
Palm Fruits

The earliest evidence suggesting the human utilisation of wild date palm fruits in the Near East is dated to the sixth and fifth millennia B.C. Despite the lack of archaeological data, it is commonly believed that at the end of the Late Uruk period (c. 3300–3100 B.C.) the Sumerians established the first date palm plantations. Nevertheless, this belief has never been well-proven by any scientific data, which makes this issue open to debate. This article points to the images of the date palm known from the pictographic script from Uruk as an important source of botanical data—a concept which has never been discussed in the literature—and elaborates on the phenotypic traits of the Phoenix dactylifera L. discernible there. It aims to establish the level and condition of horticultural knowledge of the cultivators of the date palm tree in the late fourth millennium B.C.Many of the botanical traits found on the date palm pictographs are noteworthy, especially where the morphology of the crown, trunk, and root zone are concerned. Most importantly, the identification of pictographs representing date palm inflorescences prompts us to the conclusion that the Sumerians discovered the dioecious nature of the Phoenix dactylifera L., selecting the staminate inflorescences to pollinate female trees by at least c. 3300 B.C. The discovery of this method of artificial fertilization was a turning point in Mesopotamian agriculture since it enabled farmers to obtain a better crop while economizing on space and labour, constituting the beginning of the date palm plantations that are still such a feature of present-day Iraq.

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