Silicon enhances photochemical efficiency and adjusts mineral nutrient absorption in Magnaporthe oryzae infected rice plants

• Autorzy: Gao D. , Cai K. , Chen J. , Luo S. , Zeng R. , Yang J. , Zhu. X.
• Języki publikacji: EN

Abstrakty

EN

Silicon (Si) has been verified to play an important role in enhancing plant resistance against pathogens, but the exact mechanisms remain unclear. Two near-isogenic lines of rice (Oryza sativa L.), CO39 (blast susceptible), and C101LAC (Pi-1) (blast resistant), were hydroponically grown to study the effects of exogenous silicon application on the changes of disease incidence, mineral nutrient concentrations, chlorophyll content, and photochemical efficiency in Magnaporthe oryzae infected rice plants. Si amendment in nutrient solution at a concentration of 2.0 mM significantly reduced the disease index of rice plants of CO39 and C101LAC (Pi-1). Silicon application alone had no effects on mineral nutrient contents, chlorophyll content, maximum/potential quantum efficiency (Fv/Fm), and the maximum primary yield (Fv/F0) of photochemistry of PS II in healthy rice leaves. M. oryzae inoculation significantly increased the content of K, Na, Ca, Mg, Fe, and reduced the value of Fv/F0 and Fv/Fm in rice leaves. However, Si treatment suppressed M. oryzae induced increase of mineral nutrient contents, and significantly increased Fv/F0 and Fv/Fm value compared with Sideficient infected plants. These results suggest that siliconenhanced resistance to rice blast is associated with an enhancement of photochemical efficiency and adjustment of mineral nutrient absorption in M. oryzae-infected rice plants.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2011
• Tom: 33
• Numer: 3
• Opis fizyczny: p.675-682,fig.,ref.

Twórcy

autor

Gao D.

• College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
• Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University, Guanzhou 510642, China

autor

Cai K.

• Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University, Guanzhou 510642, China

autor

Chen J.

• Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University, Guanzhou 510642, China

autor

Luo S.

• Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University, Guanzhou 510642, China

autor

Zeng R.

• Key Laboratory of Ecological Agriculture of Ministry of Agriculture, South China Agricultural University, Guanzhou 510642, China

autor

Yang J.

• Institute of Plant Protection,Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China

autor

Zhu. X.

• Institute of Plant Protection,Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China

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