Mehanny, A., Khalifa, G., Abd Elbar, O., Habib, S., Abba Dawud, M. (2022). Seasonal Effects on Some Eco-Morphological and Physiological Characters of Tamarix nilotica (Ehrenb) Bunge Growing Naturally in Egyptian Northern Coastal Salt Marshes. test, 30(1), 19-28. doi: 10.21608/ajs.2022.108934.1439
Aya Mehanny; Gamal Khalifa; Ola Abd Elbar; Sami Habib; Maryam Abba Dawud. "Seasonal Effects on Some Eco-Morphological and Physiological Characters of Tamarix nilotica (Ehrenb) Bunge Growing Naturally in Egyptian Northern Coastal Salt Marshes". test, 30, 1, 2022, 19-28. doi: 10.21608/ajs.2022.108934.1439
Mehanny, A., Khalifa, G., Abd Elbar, O., Habib, S., Abba Dawud, M. (2022). 'Seasonal Effects on Some Eco-Morphological and Physiological Characters of Tamarix nilotica (Ehrenb) Bunge Growing Naturally in Egyptian Northern Coastal Salt Marshes', test, 30(1), pp. 19-28. doi: 10.21608/ajs.2022.108934.1439
Mehanny, A., Khalifa, G., Abd Elbar, O., Habib, S., Abba Dawud, M. Seasonal Effects on Some Eco-Morphological and Physiological Characters of Tamarix nilotica (Ehrenb) Bunge Growing Naturally in Egyptian Northern Coastal Salt Marshes. test, 2022; 30(1): 19-28. doi: 10.21608/ajs.2022.108934.1439

Seasonal Effects on Some Eco-Morphological and Physiological Characters of Tamarix nilotica (Ehrenb) Bunge Growing Naturally in Egyptian Northern Coastal Salt Marshes

Arab Universities Journal of Agricultural Sciences
Article 15, Volume 30, Issue 1, June 2022, Pages 19-28    PDF (443.12 K)
Document Type: Original Article
DOI: 10.21608/ajs.2022.108934.1439
Authors
Aya Mehanny1; Gamal Khalifa1; Ola Abd Elbar* 1; Sami Habib1; Maryam Abba Dawud2
1Agricultural Botany Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
2Cereals Department, Lake Chad Research Institute, Maiduguri, Nigeria
Abstract
Tamarix nilotica is a perennial halophyte growing naturally at the Mediterranean coastal salt marshes. Vegetative parts were collected in two successive winters and summers to investigate the seasonal effects on the ecomorphological and physiological responses of T. nilotica. The results indicated that either in winter or summer seasons, T. nilotica can reduce the effect of soil salinity by excreting salts outside its body through salt glands. Summer season was characterized by low content of soil moisture (due to rare rainfall), high soil EC, high light intensity and high temperature; there-fore, plant induced certain morphoanatomical changes in leaves and stem to face the previously mentioned adverse conditions. The most remarkable changes to reduce transpiration process was found by decreasing leaf area and increasing cuticle thickness and mesophyll tissue thickness. In addition, the most marked physiological changes in summer were the significant in-crease in total phenols, proline, free amino acids and total soluble sugars. These compounds can work as osmotic regulators and/or antioxidants. These features enhance the defensive mechanism against dehydration and permit T. nilotica to tolerate the stress conditions in salt marsh habitat. 
Keywords
Seasonal changes; Salinity; Drought; Salt marches; Tamarix nilotica
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