Energy dissipation and antioxidant enzyme system protect photosystem II of sweet sorghum under drought stress

Title:

Energy dissipation and antioxidant enzyme system protect photosystem II of sweet sorghum under drought stress

Creator:

Guo, Y. Y., Tian, S. S., Liu, S. S., Wang, W. Q., and Sui, N.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:7f92fc46-0f84-426b-a369-339514787a77
uuid:7f92fc46-0f84-426b-a369-339514787a77
issn:0300-3604
doi:10.1007/s11099-017-0741-0

Subject:

voda, water, antioxidační enzymy, chlorofylová fluorescence, environmentální stres, čirok dvoubarevný, antioxidant enzymes, chlorophyll fluorescence, environmental stress, sorghum bicolor, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

The effect of drought stress on energy dissipation and antioxidant enzyme system in two sweet sorghum inbred lines (M-81E and Roma) was investigated. Results showed that the germination indicator increased more in M-81E than that in Roma under rehydration. Under drought stress, both the maximal photochemical efficiency of PSII (Fv/Fm) and oxidoreductive activity (ΔI/I0) of Roma decreased more than those in M-81E. Relative to Fv/Fm, the ΔI/I0 decreased markedly, which indicated that PSI was more sensitive to drought stress than PSII. Increases in the reduction state of QA (1-qp), nonphotochemical quenching (NPQ) and minimal fluorescence yield of the dark-adapted state (F0) were greater in Roma than those in M-81E; meanwhile, the H2O2 content was lower in M-81E than that in Roma. Our results suggested that the photoinhibition might be related to the accumulation of reactive oxygen species (ROS). The antioxidant enzyme system and energy dissipation of M-81E could respectively increase drought tolerance by eliminating ROS and excess energy more efficiently than that of Roma., Y. Y. Guo, S. S. Tian, S. S. Liu, W. Q. Wang, N. Sui., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

861-872

Source:

Photosynthetica | 2018 Volume:56 | Number:3

Harvested from:

CDK

Metadata only:

false