Exploitation of synthetic-derived wheats through osmotic stress responses for drought tolerance improvement

文献类型： 外文期刊

第一作者： Ali, Ahmad

作者： Ali, Ahmad;Sher, Hassan;Arshad, Muhammad;Fatima, Sammer;Naqvi, S. M. Saqlan;Ahmad, Manzoor;Kazi, Alvina Gul;Rasheed, Awais;Rasheed, Awais;Mujeeb-Kazi, Abdul

作者机构：

关键词： Osmotic stress;Synthetic-derived wheats;Osmoprotectant;Antioxidants

期刊名称：ACTA PHYSIOLOGIAE PLANTARUM （ 影响因子：2.354； 五年影响因子：2.711 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The development of drought tolerant wheat cultivars has been slow due to lack of understanding the diagnostic physiological parameters associated with improved productivity under water stress. We evaluated responses to PEG induced osmotic stress under hydroponics in D-genome synthetic derived and bread wheat germplasm with the main aim to unravel and identify some promising attributes having role in stress tolerances. Genotypes used in this study differed in their morpho-physiological and biochemical attributes. Tolerant genotypes exhibited the ability to ameliorate harmful effects of PEG induced osmotic stress through better osmotic adjustment achieved through substantial relative water content (RWC), lowered osmotic potential, relatively stable root length having maximum water extraction capacity, significant increase in osmoprotectant concentration and relatively enhanced antioxidant activities. The results clearly revealed the importance of synthetic derivatives over check cultivars and conventional wheats in terms of osmotic stress responses. Interestingly, synthetic-derived advanced lines with Aegilops tauschii in its parentage including AWL-02, AWL-04 and AWL-07 proved superior over the best rainfed check cultivar (Wa-01). It was concluded that synthetic-derived wheats has great potential to improve a range of stress adaptive traits. It could, therefore, be recommended to be a useful strategy for allowing modern bread wheat to become adapted to a wider range of environments in future climate change scenarios.

分类号： Q94

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