Version 1
: Received: 22 October 2024 / Approved: 22 October 2024 / Online: 23 October 2024 (10:12:55 CEST)
How to cite:
Chen, F.; Xiao, L.; Huang, Q.; Xiang, L.; Li, Q.; Hou, X.; Lei, Z.; Zeng, Y. Physiological Evaluation of Salt Tolerance on Different Genotypes of Sunflower Germplasms at the Seedling Stage. Preprints2024, 2024101786. https://doi.org/10.20944/preprints202410.1786.v1
Chen, F.; Xiao, L.; Huang, Q.; Xiang, L.; Li, Q.; Hou, X.; Lei, Z.; Zeng, Y. Physiological Evaluation of Salt Tolerance on Different Genotypes of Sunflower Germplasms at the Seedling Stage. Preprints 2024, 2024101786. https://doi.org/10.20944/preprints202410.1786.v1
Chen, F.; Xiao, L.; Huang, Q.; Xiang, L.; Li, Q.; Hou, X.; Lei, Z.; Zeng, Y. Physiological Evaluation of Salt Tolerance on Different Genotypes of Sunflower Germplasms at the Seedling Stage. Preprints2024, 2024101786. https://doi.org/10.20944/preprints202410.1786.v1
APA Style
Chen, F., Xiao, L., Huang, Q., Xiang, L., Li, Q., Hou, X., Lei, Z., & Zeng, Y. (2024). Physiological Evaluation of Salt Tolerance on Different Genotypes of Sunflower Germplasms at the Seedling Stage. Preprints. https://doi.org/10.20944/preprints202410.1786.v1
Chicago/Turabian Style
Chen, F., Zhonghua Lei and Youling Zeng. 2024 "Physiological Evaluation of Salt Tolerance on Different Genotypes of Sunflower Germplasms at the Seedling Stage" Preprints. https://doi.org/10.20944/preprints202410.1786.v1
Abstract
Sunflower (Helianthus annuus L.) is an important oilseed crop cultivated extensively across the globe. High salinity adversely impacts plant growth and physiological processes. In this study, the data of the phenotypes and various indices were collected to clarify the physiological mechanisms underlying sunflower's salt tolerance with the seedlings of two salt-tolerant (182265 and 182283) and two salt-sensitive (182093 and 186096) genotypes, which were exposed to 350 mM NaCl for 4 days. The findings revealed that, during the seedling stage, salt-tolerant sunflowers accumulated less Na+ and more K+, resulting in a higher K+/Na+ ratio that mitigated ionic toxicity throughout the plants, compared to the salt-sensitive resources. Furthermore, the salt-tolerant germplasms also exerted salt tolerance through the following several pathways: they maintained robust osmotic regulation by accumulating higher levels of proline, soluble sugars, and other osmolytes; they neutralized reactive oxygen species (ROS) by elevating the activity of antioxidant enzymes; and they sustained optimal growth by boosting photosynthesis. Taken together, this study provided a more comprehensive assessment of the sunflower's physiological salt tolerance, offering valuable insights for further exploration of the molecular mechanisms of salt tolerance and accelerating the breeding process for sunflower varieties with improved salt resilience.
Keywords
Salt tolerant and sensitive sunflower germplasms; Seedling stage; Phenotypes and physiological indicators; The evaluation of salt
Subject
Biology and Life Sciences, Agricultural Science and Agronomy
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
