Open Access
ARTICLE
Effects of Salt-Alkaline Stress on Carbohydrate Metabolism in Rice Seedlings
Xiwen Shao1, Dongsheng Gai1, Dapeng Gao1, Yanqiu Geng1,*, Liying Guo1,2,*
1 Jilin Agricultural University, Changchun, 130118, China
2 Key Laboratory of Germplasm Innovation and Physiological Ecology of Grain Crops in Cold Region, Ministry of Education, Harbin, 150030, China
* Corresponding Authors: Yanqiu Geng. Email: ; Liying Guo. Email:
(This article belongs to the Special Issue: High-Yield Rice Physiology & Genetics)
Phyton-International Journal of Experimental Botany 2022, 91(4), 745-759. https://doi.org/10.32604/phyton.2022.018933
Received 25 August 2021; Accepted 02 November 2021; Issue published 09 December 2021
Abstract
The aim of this study was to investigate carbohydrate metabolism in rice seedlings subjected to salt-alkaline stress. Two relatively salt-alkaline tolerant (Changbai 9) and sensitive (Jinongda 138) rice cultivars, grown hydroponically, were subjected to salt-alkaline stress via 50 mM of salt-alkaline solution. The carbohydrate content and the activities of metabolism-related enzymes in the leaves and roots were investigated. The results showed that the contents of sucrose, fructose, and glucose in the leaves and roots increased under salt-alkaline stress. Starch content increased in the leaves but decreased in the roots under salt-alkaline stress. The activities of sucrose-phosphate synthase, sucrose synthase, amylase, and ADP-glucose pyrophosphorylase increased whereas the activities of neutral invertase and acid invertase decreased in the leaves under salt-alkaline stress. The activities of sucrose-phosphate synthase, sucrose synthase, amylase, neutral invertase, and acid invertase increased in the roots under salt-alkaline stress. In conclusion, salt-alkaline stress caused the accumulation of photosynthetic assimilates in the leaves and decreased assimilation export to the roots.
Keywords
Cite This Article
Shao, X., Gai, D., Gao, D., Geng, Y., Guo, L. (2022). Effects of Salt-Alkaline Stress on Carbohydrate Metabolism in Rice Seedlings.
Phyton-International Journal of Experimental Botany, 91(4), 745–759. https://doi.org/10.32604/phyton.2022.018933