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Articles by B.T. Yasseen
Total Records ( 2 ) for B.T. Yasseen
  B.T. Yasseen , M.A. Abu-Al-Basal and F.A. Alhadi
  The need to develop plants with higher resistance to environmental stresses has increased tremendously in the last forty years. Drought (water stress) and salinity are major problems facing agriculture allover the world. Much work have been done to determine the anatomical, physiological and biochemical features that are consistently associated with the response and resistance to water stress and salinity during different stages of growth and development and because leaf area is a major determinant of photosynthesis and yield of crop plants, it should be considered in any serious program to improve the resistance of crop plants under stress conditions. Thus, the present review focuses on the analysis of plant and leaf growth and the growth variables and processes that might be affected by osmotic stresses; which could be considered as parameters for screening drought and salinity traits in crop plants, thereby can be used in the breeding programs and/or in the modern technology to improve resistance to those environmental conditions. Also, the recent efforts of drawing the perspectives of improving plant adaptation under osmotic stress through the linking of leaf growth variables and the genetic approach are discussed.
  B.T. Yasseen
  Rapid disappearing of many coastal and inland habitats in the State of Qatar, due to the enormous activities of constructions, would put wildlife at real risk; urging scientists for environment conservation. This study was aimed to document the morphological features and the ecophysiological aspects of four wild plant species, Aeluropus lagopoides, Sporobolus spicatus, Ochradenus baccatus and Tetraena qatarense. Analyses included physical and chemical properties of soils and organic and inorganic contents of these plants were carried out. Although these plants are considered as xerophytes as the data of soil water content have shown; they might have well adapted to saline environments, since they live in soils of high salinity levels. A. lagopoides, S. spicatus and T. qatarense were living in soils of ECe ranged between 45 to 50 dS m-1, between 107 to 128 dS m-1 and between 12 to 187 dS m-1 respectively. O. baccatus, on the other hand, proved to be a typical xerophyte plant since it was never found in saline soils and survived water deficit as low as 4-12% field capacity. Considerable variations were found in all parameters studied especially in the electrical conductivity of the saturated soil extracts (ECe). Also, these species showed great variation in the organic components especially proline, soluble sugars and nitrogen, photosynthetic pigments and major elements. The data of trace elements, however, did not indicate clear differences. Such efforts can be considered as a prerequisite for successful ecological restoration, encouraging the decision makers to implement plans for restoration of vegetation.
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