Physiological and Molecular Responses of Wheat to Low Light Intensity
Xiu Li,
Rui Yang,
Liulong Li,
Ke Liu,
Matthew Tom Harrison,
Shah Fahad,
Mingmei Wei,
Lijun Yin,
Meixue Zhou,
Xiaoyan Wang
Affiliations
Xiu Li
Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, School of Agriculture, Yangtze University, Jingzhou 434025, China
Rui Yang
Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, School of Agriculture, Yangtze University, Jingzhou 434025, China
Liulong Li
Key Laboratory of Crop Physiology and Ecology in Southern China, National Technology Innovation Center for Regional Wheat Production, Nanjing 210000, China
Ke Liu
Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, School of Agriculture, Yangtze University, Jingzhou 434025, China
Matthew Tom Harrison
Tasmanian Institute of Agriculture, University of Tasmania, Newnham Drive, Launceston, TAS 7248, Australia
Shah Fahad
Department of Agriculture, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa 23200, Pakistan
Mingmei Wei
Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, School of Agriculture, Yangtze University, Jingzhou 434025, China
Lijun Yin
Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, School of Agriculture, Yangtze University, Jingzhou 434025, China
Meixue Zhou
Tasmanian Institute of Agriculture, University of Tasmania, Newnham Drive, Launceston, TAS 7248, Australia
Xiaoyan Wang
Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, MARA Key Laboratory of Sustainable Crop Production in the Middle Reaches of the Yangtze River, School of Agriculture, Yangtze University, Jingzhou 434025, China
Here we document physiological and molecular attributes of three wheat cultivars (ZM9023, YM158 and FM1228) under low light intensity with advanced technologies, including non-standard quantitative technology and quantitative proteomics technology. We found lower dry matter accumulation of YM158 compared with ZM 9023 and FM1228 under low light intensities due to up-regulation of photosynthetic parameters electron transport rate (ETR), Y(II), Fv/Fm, Chl (a + b) of YM158 and down-regulation of Chl a/b. ETR, Y(II) and Fv/Fm significantly decreased between ZM9023 and FM1228. The ETR between PSII and PSI of YM158 increased, while light use efficiency (LUE) of ZM9023 and FM1228 decreased. We found that YM158 had greater propensity to adapt to low light compared with ZM9023, as the former was able to increase photochemical electron transfer rate, enhance photosystem activity, and increase the light energy under low light. This meant that the YM158 flag leaf has stronger regulatory mechanism under low light environment. Through proteomic analysis, we found LHC protein (LHCB1, LHCB4, LHCA2, LHCA3) for YH158 was significantly up-regulated, while the PSII subunit protein of FM1228 and ZM9023 b559 subunit protein were down-regulated. We also documented enhanced light use efficiency (LUE) due to higher light capture pigment protein complex (LHC), photosystem II (PSII), PSI and cytochrome B6F-related proteins, with dry matter accumulation being positively correlated with Fv/Fm, ETR, and ΦPS(II), and negatively correlated with initial fluorescence F0. We suggest that Fv/Fm, ETR, and ΦPS(II) could be considered in shade tolerance screening to facilitate wheat breeding.
