Siliconbgb B application ameliorates the growth and physiological attributes of maize (Zea mays L.) under salt stress | [Abstract Book on International Conference on Food and Applied Sciences (ICFAS-23) 3-5 August 23 • 2023]

Author(s):

1. Habib Ali: Department of Agronomy, PirMehr Ali Shah And Agriculture University Rawalpindi, Pakistan

2. Husnam Jawad: Agronomic Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan

3. Mukhtar Ahmad: Department of Agronomy, PirMehr Ali Shah And Agriculture University Rawalpindi, Pakistan

4. Imran Mahmood: Department of Agronomy, PirMehr Ali Shah And Agriculture University Rawalpindi, Pakistan

5. Alishba Waheed: Department of Botany, Khawaja Fareed University of Engineering and Information Technology Rahim Yar Khan, Pakistan

6. Usman Shoukat: Department of Agronomy, University of Agriculture Faisalabad-38000 Pakistan

7. Adeel Anwar: Department of Agronomy, PirMehr Ali Shah And Agriculture University Rawalpind, Pakistan

8. Ghulam Abbas: Agronomic Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan

9. Muhammad Azeem Sabir: Institute of Forest Sciences, TheIslamia University of Bahawalpur, Bahawalpur, Pakistan

10. Usman Zulfiqar: Department of Agronomy. Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan

11. M. Saqib: Agronomic Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan

12. Umais Asghar Khan: Institute of Horticultural Sciences, University of Agriculture, Faisalabad, Pakistan

13. Salam Hussain: College of Agronomy, Northwest Agriculture and Forestry University, Yangling, China

Abstract:

Salinization, a prevailing abiotic factor, poses a significant hindrance to plant growth and productivity. Yield loss becomes particularly prominent when salt stress occurs before the reproductive stage, resulting in poor osmotic relations and disrupted source-sink relationships. Therefore, it is crucial to evaluate salt tolerance in all developed maize plant species. An effective approach to mitigate this widespread stress is the application of silicon, which not only enhances plant growth but also maintains leaf metabolic pathways and ionic balance, thus facilitating transpiration and photosynthesis by promoting stomatal opening. However, despite these promising effects, a comprehensive understanding of the physiological mechanisms underlying silicon's action is still needed to effectively counter salt-induced toxicity. In light of this, the primary objective of this study was to investigate the impact of different concentrations of silicon (3.5 mM and 6.5mM) applied at the second leaf stage of maize cultivar (YH-5427) under two distinct NaCl levels (250 mM and 300 mM). The findings of this research demonstrate that silicon plays a vital role in minimizing the detrimental effects of salt stress. It accomplishes this by increasing the activity of antioxidants, such as SOD (by 52%) and CAT (by 49%), as well as the level of compatible solutes, like GB (by 9%). Additionally, silicon application reduces electrolyte leakage (EL) and relative water loss (ELWL) by 1.6% and enhances relative water content (RWC) by 6%. Remarkably, it also leads to a significant improvement in chlorophyll a and b levels (by 1.4% and 6.9%), serving as an indicator of silicon's ability to alleviate salt stress in crops. Furthermore, this study elucidates the capability of silicon to maintain Na+/K+ ionic homeostasis under salt stress conditions. Notably, among the various silicon treatments, Si6.5 demonstrates excellent results in enhancing salinity tolerance. Given the remarkable impact of silicon on this particular maize cultivar, it is strongly recommended to pursue future field research to comprehensively investigate the solid interaction between siliconand maize under salt stress conditions, thereby bridging existing research gaps, offering novel insights, and formulating hypothesis for further exploration.

Page(s): 399-399

DOI: DOI not available

Published: Journal: Abstract Book on International Conference on Food and Applied Sciences (ICFAS-23) 3-5 August 23, Volume: 0, Issue: 0, Year: 2023

Keywords:

salinity , maize , silicon , Compatible solutes , Physiological traits , Ionic Homeostasis

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