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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

Stripe rust disease symptoms at 14 days post inoculation (dpi) on the susceptible (Sy95-71) and resistant (CN19) wheat cultivars at the adult plant stage. CK, un-inoculated leaves.
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Figure 1: Stripe rust disease symptoms at 14 days post inoculation (dpi) on the susceptible (Sy95-71) and resistant (CN19) wheat cultivars at the adult plant stage. CK, un-inoculated leaves.

Mentions: Adult plants of Sy95-71 and CN19 showed different symptoms at 14 days post-inoculation (dpi) with race CY32 (Figure 1). Stripe rust uredia were visible on the flag leaves in the susceptible wheat Sy95-71, representing a disease severity of 95% compared with the un-inoculated control of Sy95-71. However, no sporulation appeared on inoculated leaves in the resistant wheat cultivar CN19. Therefore, Sy95-71 was susceptible, while CN19 was highly resistant against to the stripe rust at the adult plant stage.


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)

Stripe rust disease symptoms at 14 days post inoculation (dpi) on the susceptible (Sy95-71) and resistant (CN19) wheat cultivars at the adult plant stage. CK, un-inoculated leaves.
© Copyright Policy
Related In: Results  -  Collection

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

Figure 1: Stripe rust disease symptoms at 14 days post inoculation (dpi) on the susceptible (Sy95-71) and resistant (CN19) wheat cultivars at the adult plant stage. CK, un-inoculated leaves.
Mentions: Adult plants of Sy95-71 and CN19 showed different symptoms at 14 days post-inoculation (dpi) with race CY32 (Figure 1). Stripe rust uredia were visible on the flag leaves in the susceptible wheat Sy95-71, representing a disease severity of 95% compared with the un-inoculated control of Sy95-71. However, no sporulation appeared on inoculated leaves in the resistant wheat cultivar CN19. Therefore, Sy95-71 was susceptible, while CN19 was highly resistant against to the stripe rust at the adult plant stage.

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