Salinity is one of the most crucial variables that limits crop productivity and quality. They influence various physiological processes, including seed germination and subsequent plant growth. The negative effects of salinity stress on germination could be minimized through different seed priming treatments. In this regard, this study was conducted to investigate the priming of cumin seed with both Amla extract and salt solution (NaCl) as an interesting strategy to improve salt tolerance and its impact on cumin (Cuminum cyminum L) seed germination and growth. Our data showed that seed priming before planting in Amla extract and salt solution improved growth parameters such as cumin length, number of branches, fresh weight, seed weight per plant, and number of seeds per umbel. The present study also showed a decrease in growth parameters under severe stress conditions (50 mM NaCl), while plants pre-soaked with both Amla extract and salt solution reduced this effect. Pre-soaking in Amla extract and salt solution reduced the inhibitory effect of salt stress on photosynthetic pigments and significantly increased the content of essential oils, total phenolic, flavonoids, amino acid content, proline, and antioxidant activity under the influence of severe salt stress. The findings of this research revealed that treatment of cumin plants with both Amla extract and NaCl strongly stimulated the expression of the SA, PRO, and POX genes.
Aims: Mangroves are woody trees or shrubs that grow in the intertidal zone and are distributed along tropical and subtropical coasts. These plants are resilient to various environmental challenges; they are also one of the most efficient terrestrial and coastal ecosystem for carbon fixation and storage. In recent years, mangrove reforestation has attracted much attention as a strategy to reduce the effects of climate change. In Egypt, there are two types of mangroves, Rhizophora mucronata and Avicennia marina, between 30°N and 30°S of the equator. Mangrove management presents a difficult task, particularly when it comes to managing molecular mangroves for long-term sustainability. With the impact of human activity on mangrove ecosystems increasing each year, molecular research on mangrove correlates remains to be conducted. For this reason, using DNA barcoding technology to quickly identify species, mangrove ecosystems may be protected.
Methodology: In this work, the two Egyptian mangrove species were assessed through morphological, cytological, and molecular approaches. Two universal DNA barcodes, rbcL and ITS, were examined to identify their efficacy for Egyptian mangrove species identification and phylogenetic reconstruction.
Results: According to pairwise alignments, the rbcL region had the highest level of variability (73.2%), whereas the ITS region was the least variable (11.96%). The selected Egyptian mangrove species can potentially be distinguished by barcoding loci rbcL and ITS due to the existence of distinctive variable sites.
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