HUBEI AGRICULTURAL SCIENCES ›› 2021, Vol. 60 ›› Issue (23): 168-171.doi: 10.14088/j.cnki.issn0439-8114.2021.23.037

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Expression analysis of PpPRR5 gene in pear genotypes with different degrees of photosynthetic rate

LIU Zheng1, AN Lin2, WU Tao1, QIN Zhong-qi1, YANG Li1, CHENG Yin-sheng1   

  1. 1. Institute of Fruit and Tea, Hubei Academy of Agricultural Science/Fruit and Tea Research Branch, Hubei Innovation Center of Agricultural Science and Technology,Wuhan 430064,China;
    2. Key Laboratory of Horticultural Plant Biology (Ministry of Education),Huazhong Agricultural University,Wuhan 430072,China
  • Received:2021-08-01 Online:2021-12-10 Published:2021-12-21

Abstract: Improvement in photosynthesis is an effective way to further increase yield potential in fruit crops. Circadian clock genes could be adjusted by environmental cues, and thereby regulate photosynthesis. The differences of photosynthesis of different types of pear varieties (including Pyrus pyrifolia, Pyrus bretschneider and western pear) were studied and analyzed, and the expression level and change pattern of PpPRR5 gene in different varieties were detected. The results showed that significantly different levels of net photosynthetic rate were observed in five pear genotypes. Pyrus pyrifolia Nakaicv. ‘Cuiguan' had the highest levels of net photosynthetic rate. Pyrus bretschneider maintained moderate levels of net photosynthetic rate. Pyrus communis L. cv. ‘Abate Fetel' showed the lowest levels of net photosynthetic rate. There was a negative correlation between the expression of circadian clock gene PpPRR5 and the capacity of pear genotype for photosynthetic rate. The result suggests that PpPRR5 acts as a negative regulator of photosynthetic performance.

Key words: pear, photosynthesis, different genotypes, PpPRR5, expression levels

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