Yazar "Islam, Md Rafiqul" seçeneğine göre listele

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    Evaluation of Drought Tolerance of Some Wheat (Triticum aestivum L.) Genotypes through Phenology, Growth, and Physiological Indices
    (Mdpi, 2021) Chowdhury, M. Kaium; Hasan, M. A.; Bahadur, M. M.; Islam, Md Rafiqul; Hakim, Md Abdul; Iqbal, Muhammad Aamir; Javed, Talha
    Increasing human population and changing climate, which have given rise to frequent drought spells, pose a serious threat to global food security, while identification of high yielding drought tolerant genotypes remains a proficient approach to cope with these challenges. To offer a methodology for the evaluation of the drought-tolerant wheat genotypes based on the pheno-physiological traits, a field experiment was executed, entailing four wheat genotypes viz. BARI Gom 26, BAW 1158, BAW 1167, and BAW 1169 and two water conditions viz. control treatment (three times irrigation at 20, 50, and 70 DAS, i.e., 100% field capacity) and stressed treatment (no irrigation during the entire growing season). The results revealed that drought stress drastically reduced the days to booting, heading, anthesis and physiological maturity, relative water content (RWC), chlorophyll content, canopy temperature depression (CTD), and photo-assimilates-spike dry matter (SDM), grains spike(-1) and grain yield of all wheat genotypes. In addition, the genotypes BAW 1167 and BARI Gom 26 remained more prone to adverse effects of drought as compared to BAW 1169 and BAW 1158. Furthermore, DS induced biosynthesis of compatible solutes such as proline, especially in BAW 1169, which enabled plants to defend against oxidative stress. It was inferred that BAW 1169 remained superior by exhibiting the best adaptation as indicated by the maximum relative values of RWC, total chlorophyll, CTD, proline content, SDM, grains spike(-1), and grain yield of wheat. Thus, based on our findings, BAW 1169 may be recommended for general adoption and utilization in future wheat breeding programs aimed at developing potent drought-tolerant wheat genotypes to ensure food security on a sustainable basis.
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    Strigolactones: A novel carotenoid-derived phytohormone - biosynthesis, transporters, signalling, and mechanisms in abiotic stress
    (Springer International Publishing, 2021) Hossain, Akbar; Raza, Ali; Maitra, Sagar; Asaduzzaman, Md; Islam, Md Rafiqul; Hossain, Md Jamil; Sabagh, Ayman E. L.
    Phytohormones (PHs) play central roles in improving the survival ability of plants to various abiotic stresses. The major PHs are auxins, abscisic acid (ABA), gibberellins (GAs), jasmonic acid (JA), salicylic acid (SA), ethylene (ET), cytokinin (CK), and brassinosteroids (BRs), and nitric oxide (NO), polyamines (PA), and plant peptide are also considered as PHs. Besides them, newly identified PHs are strigolactones (SLs) and karrikins (KARs). Among them, SLs have been categorized as novel carotenoid-derived PHs, although they were primarily recognized as host-derived stimulating substances for germination of parasitic weeds under the genera Striga and Orobanche. Lately, SLs were established as host detection and hyphal-branching signals for arbuscular mycorrhizal (AM) fungi. In plants, they control numerous developing processes which lead plants to acclimatize to survive various abiotic stresses, particularly heat, drought, cold, salinity and waterlogging. In the last decade, the detection of SLs provides a novel prospect to reconnoitre PHs regulation of plant for advance and adaptation to ecological restrictions. Recent investigations also recognized novel examples of PHs cross talk contributing in the adaptation of inclusive rejoinders in plants. In this chapter, we have discussed the biosynthesis, signalling, governing, and physiochemical roles of SLs in numerous abiotic stress conditions. Therefore, it is revealed that the comprehensive thoughtful of SLs will be a significant issue for overwhelming the difficulties of crop damage as a consequence of hostile environments. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2021. All rights reserved.