Browsing by Author "El Sabagh, A."

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Drought and Salinity Stresses in Barley: Consequences and Mitigation Strategies
(Southern Cross Publishing, 2019) El Sabagh, A.; Kızılgeçi, Ferhat; Hossain, A.; Islam, M.S.; Barutcular, C.; Hussain, S.; Hasanuzzaman, M.; Saneoka, H.
Recent trends show reductions in crop productivity worldwide due to severe climatic change. Different abiotic stresses significantly affect the growth and development of plants, leading to decreased crop yields. Salinity and drought stresses are the most common abiotic stresses, especially in arid and semi-arid regions, and are major constraints for barley production. The present review attempts to provide comprehensive information related to barley plant responses and adaptations to drought and salinity stresses, including physiological and agronomic, in order to alleviate the adverse effect of stresses in barley. These stresses reduce assimilation rates, as they decrease stomatal conductance, disrupt photosynthetic pigments, reduce gas exchange, enhance production of reactive oxygen species, and lead to decreased plant growth and productivity. This review focuses on the strategies plants use to respond and adapt to drought and salinity stress. Plants utilize a range of physiological and biochemical mechanisms such as adaptation strategies, through which the adverse effects can be mitigated. These include soil management practices, crop establishment, as well as foliar application of anti-oxidants and growth regulators that maintain an appropriate level of water in the leaves to facilitate adjustment of osmotic and stomatal performance. The present review highlighted the adverse effect of drought and salinity stresses barley and their mitigation strategies for sustainable barley production under changing climate. They review also underscored that exogenous application of different antioxidants could play a significant role in the alleviation of salinity and drought stress in plant systems. © 2007-2019 Southern Cross Publishing-Australia.
Phenology, Growth and Yield Are Strongly Influenced by Heat Stress in Late Sown Mustard (Brassica Spp.) Varieties
(Pakistan Botanical Society, 2020) Bazzaz, M.M.; Kızılgeçi, Ferhat; Hossain, A.; Farooq, M.; Alharby, H.; Bamagoos, A.; Nuruzzaman, M.; El Sabagh, A.
In rice-based cropping system of northern Bangladesh, mustard planting is delayed due to late harvest of monsoon rice (Transplanted Aman rice; [T. Aman rice). The late sown mustard is often exposed to high-temperature stress during the reproductive stage, which causes a significant decrease in seed yield. Most of the farmers plant a low yielding local mustard variety ‘Tori-7’, which is sensitive to high-temperature stress. The Oil Seeds Research Centre of Bangladesh Agricultural Research Institute has recently released short duration and high-yielding mustard varieties for the rice-based cropping system of northern Bangladesh to tackle this issue. However, the performance of these varieties in the target cropping system under late sown conditions (together with exposure to heat stress) has not been evaluated yet. Therefore, this two-year field experiment was conducted to assess the performance of newly released mustard varieties ‘BARI Sarisha-14’ and ‘BARI Sarisha-15’ in comparison with the local check variety ‘Tori-7’ sown at five planting dates (viz. October 21, November 1, November 10, November 20, and November 30). The delay in sowing shortened time (days) to flowering and maturity, regardless of the variety. Similarly, plant height, branches/plant and total dry matter accumulation of the tested varieties were also reduced upon delay in planting. The greatest seed yield was observed in varieties ‘BARI Sarisha-15’ and ‘BARI Sarisha-14’ when sown on October 21. These two varieties produced fair seed yield when sown at November 20. However, the local variety ‘Tori7’ yielded the least across all the planting dates. Therefore, the varieties ‘BARI Sarisha-14’ and ‘BARI Sarisha-15’ may be planted in the rice-based cropping system of northern Bangladesh after harvest of T. Aman rice to get maximum seed yield. © 2020, Pakistan Botanical Society. All rights reserved.