{"title":"UTILIZATION OF GIBBERELLIC ACID (GA3) AND MEPIQUAT CHLORIDE (M.C) AS GROWTH REGULATORS ON MAIZE TO ALLEVIATE SALINITY STRESS","authors":"","doi":"10.54910/sabrao2023.55.5.18","DOIUrl":null,"url":null,"abstract":"Maize (Zea mays L.) is a vital grain crop cultivated globally, which ranks third after wheat and rice. Its consumption in Egypt is primarily for human food, livestock and poultry feed, and raw materials for industrial products, such as, oil and starch. The main environmental factors that limit crop productivity worldwide include salinity, drought, and nutrient imbalance. Plant Growth regulators (PGR), such as, gibberellic acid (GA3) and mepiquat chloride (M.C), reduce the dramatic impacts of salinity and drought on crop growth and yield. This experiment sought to verify the influence of foliar spray application of GA3 and M.C as growth regulators on the growth metrics, chemical components, and maize harvest cultivated in calcareous soil under salinity during the summer of 2021 and 2022, respectively. The following treatments comprised foliar applications of 50 ppm GA3, 100 ppm GA3, 100 ppm M.C, and 250 ppm M.C, applied three times every season. It is clear from the results that foliar application of gibberellic (GA3) and mepiquat chloride (M.C) enhanced growth metrics, biochemical parameters, nutritional content, yield and its components, and oil percentage. After treatment with 100 ppm GA3 and 250 ppm M.C foliar spray, the yield and its constituents and oil percentage achieved the highest shares, with substantial differences between the two treatments. Compared with the control, treatments with 100 ppm GA3 and 250 ppm M.C increased grain yield by 33% and 29.9%, respectively. The study concluded that the most effective therapy for improving maize growth, development, and output under salt stress was 100 ppm GA3 and 250 ppm M.C foliar application during the growth stages. Administering GA3 and M.C mitigated successfully the damage caused by salt stress. Under salinity, gibberellic acid and mepiquat chloride addition increased the growth of maize, chlorophyll content, soluble protein, proline, and the concentration of K+ ions while decreasing the oxidative stress and the accumulation of Na+ ions.","PeriodicalId":21328,"journal":{"name":"Sabrao Journal of Breeding and Genetics","volume":"94 1","pages":"0"},"PeriodicalIF":1.6000,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sabrao Journal of Breeding and Genetics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.54910/sabrao2023.55.5.18","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Maize (Zea mays L.) is a vital grain crop cultivated globally, which ranks third after wheat and rice. Its consumption in Egypt is primarily for human food, livestock and poultry feed, and raw materials for industrial products, such as, oil and starch. The main environmental factors that limit crop productivity worldwide include salinity, drought, and nutrient imbalance. Plant Growth regulators (PGR), such as, gibberellic acid (GA3) and mepiquat chloride (M.C), reduce the dramatic impacts of salinity and drought on crop growth and yield. This experiment sought to verify the influence of foliar spray application of GA3 and M.C as growth regulators on the growth metrics, chemical components, and maize harvest cultivated in calcareous soil under salinity during the summer of 2021 and 2022, respectively. The following treatments comprised foliar applications of 50 ppm GA3, 100 ppm GA3, 100 ppm M.C, and 250 ppm M.C, applied three times every season. It is clear from the results that foliar application of gibberellic (GA3) and mepiquat chloride (M.C) enhanced growth metrics, biochemical parameters, nutritional content, yield and its components, and oil percentage. After treatment with 100 ppm GA3 and 250 ppm M.C foliar spray, the yield and its constituents and oil percentage achieved the highest shares, with substantial differences between the two treatments. Compared with the control, treatments with 100 ppm GA3 and 250 ppm M.C increased grain yield by 33% and 29.9%, respectively. The study concluded that the most effective therapy for improving maize growth, development, and output under salt stress was 100 ppm GA3 and 250 ppm M.C foliar application during the growth stages. Administering GA3 and M.C mitigated successfully the damage caused by salt stress. Under salinity, gibberellic acid and mepiquat chloride addition increased the growth of maize, chlorophyll content, soluble protein, proline, and the concentration of K+ ions while decreasing the oxidative stress and the accumulation of Na+ ions.
期刊介绍:
The SABRAO Journal of Breeding and Genetics is an international journal of plant breeding and genetics research and was first published in 1969. It is the official publication of the Society for the Advancement of Breeding Research in Asia and Oceania (SABRAO).
Its objectives are to: promote the international exchange of research information on plant breeding and genetics, by describing new research findings, or ideas of a basic or practical nature; and be a medium for the exchange of ideas and news regarding members of the Society.
The Journal gives priority to articles that are of direct relevance to plant breeders and with emphasis on the Asian region. Invited for publication are research articles, short communications, methods, reviews, commentaries, and opinion articles. Scientific contributions are refereed and edited to international standards.
The journal publishes articles for SABRAO members mainly. The Journal preferred strongly that at least one author should be a current member of the Society. Non-members may also publish in the journal.