Hafeez Noor1,2, Min Sun3,4, Hussah I M Algwaiz5, Alam Sher1,6, Sajid Fiaz7, Kotb A Attia8,9, Shabir Hussain Wani10, Muneera D F AlKahtani5, Latifa Al Husnain5, Wen Lin1,2, Zhiqiang Gao1,2. 1. College of Agriculture, Shanxi Agricultural University, Taigu, 030801, Shanxi, China. 2. State Key Laboratory of Sustainable Dryland Agriculture (In Preparation), Shanxi Agricultural University, Taiyuan, 030006, China. 3. College of Agriculture, Shanxi Agricultural University, Taigu, 030801, Shanxi, China. sunmin@sxau.edu.cn. 4. State Key Laboratory of Sustainable Dryland Agriculture (In Preparation), Shanxi Agricultural University, Taiyuan, 030006, China. sunmin@sxau.edu.cn. 5. Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh, 11675, Saudi Arabia. 6. Department of Agronomy, Ghazi University, DG Khan, Pakistan. 7. Department of Plant Breeding and Genetics, The University of Haripur, Haripur, 22620, Pakistan. 8. Center of Excellence in Biotechnology Research, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia. 9. Rice Biotechnology Lab, Rice Department, Field Crops Research Institute, ARC, Sakha, 33717, Egypt. 10. Mountain Research Center for Field Crops, Sher-e-Kashmir University of Agricultural Sciences and Technology Srinagar, Khudwani, Srinagar, Jammu and Kashmir, India.
Abstract
BACKGROUND: This study aims to understand the influence of chlorophyll fluorescence parameters on yield of winter wheat in some areas of China. Nitrogen (N) application is believed to improve photosynthesis in flag leaf ultimately increase final yield. METHODS AND RESULTS: To understand the response of chlorophyll fluorescence parameters of wheat, flag leaf and the effect of N fertilization was carried out at booting stage under greenhouse during year 2018-2019 using winter wheat cultivar "Yunhan-20410' 'Yunhan-618". The results showed that the maximum chlorophyll content of flag leaves occurred at booting stage. Under, Yunhan-20410 condition, maximum photochemical quantum efficiency (FV/Fm), potential activity (ΦPSII), potential activity of PSII (FV/FO), and photochemical quenching coefficient (qp) showed "high-low" variation, and the maximum values were observed between May 4 and May 12. However, Yunhan-20410 showed FV/Fm, FV/FO, and qp showed "low-high-low" curve at booting stage. Compared to Yunhan-618, Yunhan-20410 at booting stage significantly decreased FV/Fm, FV/FO, qp, and ΦPSII (P<0.05), and non-photochemical quenching (NPQ) significantly increased (P<0.05). CONCLUSION: The outcome of present investigation suggest that chlorophyll fluorescence parameters could be valuable insight to understand yield stability under stress condition. Moreover, the investigated parameters could be useful criteria for selection of genotypes under varying nitrogen application levels.
BACKGROUND: This study aims to understand the influence of chlorophyll fluorescence parameters on yield of winter wheat in some areas of China. Nitrogen (N) application is believed to improve photosynthesis in flag leaf ultimately increase final yield. METHODS AND RESULTS: To understand the response of chlorophyll fluorescence parameters of wheat, flag leaf and the effect of N fertilization was carried out at booting stage under greenhouse during year 2018-2019 using winter wheat cultivar "Yunhan-20410' 'Yunhan-618". The results showed that the maximum chlorophyll content of flag leaves occurred at booting stage. Under, Yunhan-20410 condition, maximum photochemical quantum efficiency (FV/Fm), potential activity (ΦPSII), potential activity of PSII (FV/FO), and photochemical quenching coefficient (qp) showed "high-low" variation, and the maximum values were observed between May 4 and May 12. However, Yunhan-20410 showed FV/Fm, FV/FO, and qp showed "low-high-low" curve at booting stage. Compared to Yunhan-618, Yunhan-20410 at booting stage significantly decreased FV/Fm, FV/FO, qp, and ΦPSII (P<0.05), and non-photochemical quenching (NPQ) significantly increased (P<0.05). CONCLUSION: The outcome of present investigation suggest that chlorophyll fluorescence parameters could be valuable insight to understand yield stability under stress condition. Moreover, the investigated parameters could be useful criteria for selection of genotypes under varying nitrogen application levels.
Authors: Carmela R Guadagno; Brent E Ewers; Heather N Speckman; Timothy Llewellyn Aston; Bridger J Huhn; Stanley B DeVore; Joshua T Ladwig; Rachel N Strawn; Cynthia Weinig Journal: Plant Physiol Date: 2017-07-14 Impact factor: 8.340