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Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (28): 57-62.doi: 10.11924/j.issn.1000-6850.casb20190900678

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Photosynthetic Characteristics and Light Response Model Fitting of Wolfberry

He Xinru1(), Wang Qinping2, Qin Ken1(), Dai Guoli1, Zhou Jun2, Zhao Ruiqiu3   

  1. 1Wolfberry Engineering Research Institute, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750001
    2North Minzu University, Yinchuan 750021
    3Yinchuan Municipal Bureau of Parks, Yinchuan 750001
  • Received:2019-09-23 Revised:2019-11-27 Online:2020-10-05 Published:2020-09-23
  • Contact: Qin Ken E-mail:hhexinru@163.com;qinken7@163.com

Abstract:

The paper aims to understand the photosynthetic characteristics of wolfberry, explore the applicability of different light response models to wolfberry photosynthesis, and provide a theoretical basis for the breeding new varieties. The paper used ‘14-Z44’, ‘14-2-3-20’ and ‘Ningqi 1’ as the materials, compared the leaf morphology physiology and photosynthetic characteristics, fitted the photosynthetic light response curve with different light response models of the three varieties. The leaf morphology and biomass were significantly different between ‘14-2-3-20’ and ‘Ningqi 1’, and there was no difference in leaf thickness and specific leaf weight. Compared with the measured values, the photosynthetic rates of the measurement points fitted by the rectangular hyperbola model and the non-rectangular hyperbola model were the closest to the measured values, but the photosynthetic parameters were significantly different with the measured values. The light response curve and photosynthetic parameters fitted by the modified rectangular hyperbola model were close to the measured values, and there was light inhibition. Compared with ‘Ningqi 1’, the photosynthetic parameters of ‘14-2-3-20’ and ‘14-z44’ were lower in LCP, LSP, Rd and higher in α, the Pnmax of ‘14-2-3-20’ was the highest. The comprehensive analysis shows that the modified rectangular hyperbola model is more suitable for fitting the wolfberry light response curve. ‘14-2-3-20’ has strong ability to use low light, high photosynthetic capacity under strong light, is not easy to be light suppressed, and has potential value in breeding high-yield varieties

Key words: wolfberry, leaf, light response model, photoresponse curve, photosynthetic parameter

CLC Number: