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Influence of stripe rust infection on the photosynthetic characteristics and antioxidant system of susceptible and resistant wheat cultivars at the adult plant stage.

Chen YE, Cui JM, Su YQ, Yuan S, Yuan M, Zhang HY - Front Plant Sci (2015)

Bottom Line: We found that chlorophyll fluorescence and the activities of the antioxidant enzymes were higher in resistant wheat than in susceptible wheat after stripe rust infection.More extensive damages occur on the thylakoid membranes in the susceptible wheat compared with the resistant wheat.The findings provide evidence that thylakoid protein phosphorylation and antioxidant enzyme systems play important roles in plant responses and defense to biotic stress.

View Article: PubMed Central - PubMed

Affiliation: College of Life Sciences, Sichuan Agricultural University Ya'an, China.

ABSTRACT
Wheat stripe rust (Puccinia striiformis f. sp. tritici, Pst), is one of the most serious diseases of wheat (Triticum aestivum L.) worldwide. To gain a better understanding of the protective mechanism against stripe rust at the adult plant stage, the differences in photosystem II and antioxidant enzymatic systems between susceptible and resistant wheat in response to stripe rust disease (P. striiformis) were investigated. We found that chlorophyll fluorescence and the activities of the antioxidant enzymes were higher in resistant wheat than in susceptible wheat after stripe rust infection. Compared with the susceptible wheat, the resistant wheat accumulated a higher level of D1 protein and a lower level of reactive oxygen species after infection. Furthermore, our results demonstrate that D1 and light-harvesting complex II (LHCII) phosphorylation are involved in the resistance to stripe rust in wheat. The CP29 protein was phosphorylated under stripe rust infection, like its phosphorylation in other monocots under environmental stresses. More extensive damages occur on the thylakoid membranes in the susceptible wheat compared with the resistant wheat. The findings provide evidence that thylakoid protein phosphorylation and antioxidant enzyme systems play important roles in plant responses and defense to biotic stress.

No MeSH data available.


Related in: MedlinePlus

Effects of stripe rust infection on chlorophyll fluorescence parameters (Fv/Fm; qP, photochemical quenching; NPQ/4, non-photochemical quenching coefficient; and ΦPSII, quantum yield of PSII electron transport) in Sy95-71 and CN19. Quantitative values (±SD) are shown below the individual fluorescence images. CK, un-inoculated wheat plants.
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Figure 6: Effects of stripe rust infection on chlorophyll fluorescence parameters (Fv/Fm; qP, photochemical quenching; NPQ/4, non-photochemical quenching coefficient; and ΦPSII, quantum yield of PSII electron transport) in Sy95-71 and CN19. Quantitative values (±SD) are shown below the individual fluorescence images. CK, un-inoculated wheat plants.

Mentions: The chlorophyll fluorescence of wheat leaves inoculated with Pst was examined by a modulated imaging fluorometer. In CN19, the maximum photochemical efficiency of PSII in the dark-adapted state (Fv/Fm) had no significant decrease in the inoculated leaves compared with the un-inoculated leaves (Figure 6). Compared with CN19, Sy95-71 exhibited a significant decrease in the Fv/Fm value after the inoculation. Furthermore, we found that the NPQ, the quantum yield of ΦPSII, and the qP values were also influenced significantly in inoculated leaves of Sy95-71 compared with the un-inoculated leaves (Figure 6). These obvious effects were not observed in the infected leaves of CN19.


Influence of stripe rust infection on the photosynthetic characteristics and antioxidant system of susceptible and resistant wheat cultivars at the adult plant stage.

Chen YE, Cui JM, Su YQ, Yuan S, Yuan M, Zhang HY - Front Plant Sci (2015)

Effects of stripe rust infection on chlorophyll fluorescence parameters (Fv/Fm; qP, photochemical quenching; NPQ/4, non-photochemical quenching coefficient; and ΦPSII, quantum yield of PSII electron transport) in Sy95-71 and CN19. Quantitative values (±SD) are shown below the individual fluorescence images. CK, un-inoculated wheat plants.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4585106&req=5

Figure 6: Effects of stripe rust infection on chlorophyll fluorescence parameters (Fv/Fm; qP, photochemical quenching; NPQ/4, non-photochemical quenching coefficient; and ΦPSII, quantum yield of PSII electron transport) in Sy95-71 and CN19. Quantitative values (±SD) are shown below the individual fluorescence images. CK, un-inoculated wheat plants.
Mentions: The chlorophyll fluorescence of wheat leaves inoculated with Pst was examined by a modulated imaging fluorometer. In CN19, the maximum photochemical efficiency of PSII in the dark-adapted state (Fv/Fm) had no significant decrease in the inoculated leaves compared with the un-inoculated leaves (Figure 6). Compared with CN19, Sy95-71 exhibited a significant decrease in the Fv/Fm value after the inoculation. Furthermore, we found that the NPQ, the quantum yield of ΦPSII, and the qP values were also influenced significantly in inoculated leaves of Sy95-71 compared with the un-inoculated leaves (Figure 6). These obvious effects were not observed in the infected leaves of CN19.

Bottom Line: We found that chlorophyll fluorescence and the activities of the antioxidant enzymes were higher in resistant wheat than in susceptible wheat after stripe rust infection.More extensive damages occur on the thylakoid membranes in the susceptible wheat compared with the resistant wheat.The findings provide evidence that thylakoid protein phosphorylation and antioxidant enzyme systems play important roles in plant responses and defense to biotic stress.

View Article: PubMed Central - PubMed

Affiliation: College of Life Sciences, Sichuan Agricultural University Ya'an, China.

ABSTRACT
Wheat stripe rust (Puccinia striiformis f. sp. tritici, Pst), is one of the most serious diseases of wheat (Triticum aestivum L.) worldwide. To gain a better understanding of the protective mechanism against stripe rust at the adult plant stage, the differences in photosystem II and antioxidant enzymatic systems between susceptible and resistant wheat in response to stripe rust disease (P. striiformis) were investigated. We found that chlorophyll fluorescence and the activities of the antioxidant enzymes were higher in resistant wheat than in susceptible wheat after stripe rust infection. Compared with the susceptible wheat, the resistant wheat accumulated a higher level of D1 protein and a lower level of reactive oxygen species after infection. Furthermore, our results demonstrate that D1 and light-harvesting complex II (LHCII) phosphorylation are involved in the resistance to stripe rust in wheat. The CP29 protein was phosphorylated under stripe rust infection, like its phosphorylation in other monocots under environmental stresses. More extensive damages occur on the thylakoid membranes in the susceptible wheat compared with the resistant wheat. The findings provide evidence that thylakoid protein phosphorylation and antioxidant enzyme systems play important roles in plant responses and defense to biotic stress.

No MeSH data available.


Related in: MedlinePlus