Does Salinity Enhance Allelopathic Effects of Tribulus terrestris L. in Citrullus Vulgaris Schrad. Agroecosystems at Nobaria, Egypt? Experimental Investigation | Chapter 02 | Recent Progress in Plant and Soil Research Vol. 5

 Field investigations in the summer of 2013 revealed that some undiscovered stressful factors had a significant impact on Citrullus vulgaris growth and yield in the Nobaria district of Egypt. Presumably, the problem was confined to the two combined causes of soil salinity and Tribulus terrestris inhibitory effects (a common weed dominant in C. vulgaris fields in the study area). Weeds are seen to be an important part of natural and agroecosystems, and their allelopathic activity has been linked to their success. Experiments in the field and in the lab were conducted to back up the previous hypothesis. The plant C. vulgaris was found to be harmed by the interaction of the two variables. The phytomass and leaf area index (LAI) of the study plant were considerably lower in the proximity of T. terrestris (bad weed management) than in the vicinity of T. terrestris (excellent weed management). In a laboratory test, the interaction of salinity and allelochemicals watery derived from T. terrestris plants had a significant impact on germination efficiency, hypocotyl-radicle length, and germination index of C. vulgaris when compared to the influence of just one factor. Finally, T. terrestris showed a significant suppressive effect on C. vulgaris growth and yield, which increased with modest or moderate salinity. Importantly, in desert agro-ecosystems, weed control is a critical technique for avoiding a wide range of interactions between crop-weed on the one hand, and weed-external climatic and edaphic factors on the other.

Author(S) Details

S. M. EL-Darier
Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21511, Egypt.

R. S. Youssef
Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21511, Egypt.

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Study on Meta-Analysis of Heavy Metal Partitioning and Allocation Plasticity of Nicotiana glauca Graham (Solanaceae)| Chapter 5 | New Visions in Biological Science Vol.10

Background: Heavy metal toxicity in contaminated settings generated a variety of physiological stress responses, resulting in damage to biological components like membranes, proteins, and DNA. Nicotiana glauca is an Egyptian invasive plant with a contradictory trend, making it difficult to assess its environmental contamination stance

The goal of this study was to explore phytomass, heavy metal concentrations, molecular expression (RAPD), and heavy metal (HM) partitioning and allocation plasticity in N. glauca using regular statistical as well as Meta-analyses (Box and Whisker plot and Pearson correlation coefficient).

The maximum heavy metal partitioning ranged from 1.15 for Mn to 9.03 for Cd, with both BCF and TF being more than one. Except for Ni in the root and Cd in the shoot, all metals showed a 100 percent significant connection in all sites. In comparison to BCF, TF, and PEC, copper had a wider interquartile range. Although all sites had a high GTS percent, site 10 had the most total number of bands and the greatest GTS percent, as well as the lowest proportion of polymorphism. Site 1, on the other hand, has the largest percentage of polymorphism and distinct bands.

Conclusion: A meta-analysis demonstrated that Nicotiana glauca is a hyperaccumulator species capable of accumulating large levels of heavy metals and adapting to polluted settings without undergoing significant genetic alterations.

 

Author(s) Details:

Salama Mohamed El-Darier,
Botany and Microbiology Department, Faculty of Science, Alexandria University, P.O. Box 21511, Alexandria, Egypt.


Ream Ibrahim Marzouk,
Botany and Microbiology Department, Faculty of Science, Alexandria University, P.O. Box 21511, Alexandria, Egypt.


Shimaa Abdel Razek Rashed,
Botany and Microbiology Department, Faculty of Science, Alexandria University, P.O. Box 21511, Alexandria, Egypt.

 

Please see the link here: https://stm.bookpi.org/NVBS-V10/article/view/5984