Effect of short-term combined alkaline stress on antioxidant metabolism, photosynthesis, and leaf-air temperature difference in sorghum

Title:

Effect of short-term combined alkaline stress on antioxidant metabolism, photosynthesis, and leaf-air temperature difference in sorghum

Creator:

Guo, J. J., Xu, X. X., Zhang, R. D., Chen, X. F., Xing, Y. F., Li, B., Liu, C., and Zhou, Y. F.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:daeee7b8-289b-406a-8aef-a31ce29f3f7d
uuid:daeee7b8-289b-406a-8aef-a31ce29f3f7d
doi:10.32615/ps.2021.067

Subject:

alkaline stress, antioxidant enzymes, chlorophyll fluorescence, leaf-air temperature difference, and physiology

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

Alkaline stress is important abiotic stress that restricts the growth and physiological activity of sorghum (Sorghum bicolor L. Moench). We aimed to investigate the effects of alkaline stress on alkali-tolerant SX44B and alkali-sensitive 262B sorghum inbred lines. The results showed that alkaline stress decreased the content of chlorophyll, activity of photosystem II, net photosynthetic rate, and destroyed chloroplast morphology. These changes were less pronounced in SX44B, possibly owing to its higher antioxidant enzyme activity and nonphotochemical quenching. Alkaline stress decreased water content, transpiration rate, and stomatal conductance while increasing the leaf temperature, with the effect being more pronounced in 262B. A significant correlation was observed between leaf-air temperature difference (ΔT) and relative water content and gas-exchange parameters, especially in 262B. Therefore, ΔT is an effective indicator for monitoring changes in sorghum leaves under alkaline stress and evaluating the alkali tolerance of different sorghum germplasm.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

200-211

Source:

Photosynthetica | 2022 Volume:60 | Number:2

Harvested from:

CDK

Metadata only:

false