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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (9): 2155-2167.doi: 10.16420/j.issn.0513-353x.2023-0690

• Cultivation · Physiology & Biochemistry • Previous Articles     Next Articles

Effect of Overexpression of Robinia pseudoacacia RpACBP3 Gene on Photosynthetic Physiological Characteristics of Nicotiana tabacum

ZHANG Songyan1, DIE Pengxiang1, SONG Mengting1, LI Zhijian1, ZHOU Jian1,2,*()   

  1. 1 School of Horticulture and Landscape Architecture,Henan Institute of Science and Technology,Xinxiang,Henan 453003,China
    2 Henan Province Engineering Center of Horticultural Plant Resource Utilization and Germplasm Enhancement,Xinxiang,Henan 453003,China
  • Received:2023-11-26 Revised:2024-04-01 Online:2024-09-25 Published:2024-09-19
  • Contact: ZHOU Jian

Abstract:

To investigate the regulatory effects of RpACBP3 from Robinia pseudoacacia on the photosynthetic-physiological functions of Nicotiana tabacum,this gene was transferred into N. tabacum‘NC89’via Agrobacterium-mediated method,and the relevant indices of RpACBP3 over-expressing tobacco plants were measured using wild-type plants as the control. The results showed that seven strains of N. tabacum with RpACBP3 over-expression were obtained in this experiment. Compared to those in wild-type plants,chlorophyll a,chlorophyll b,and total chlorophyll content considerably increased and carotenoid content decreased in RpACBP3 over-expression strains. Additionally,some indices such as initial fluorescence(Fo),non-photochemical quenching coefficient(qN)decreased,maximum photochemical efficiency(Fv/Fm),actual photochemical quantum efficiency(ΦPSII),photosynthetic rate (Pn),and intercellular CO2 concentration(Ci)increased,whereas others such as stomatal conductance(Gs),transpiration rate(Tr)decreased,stomatal length,and stomatal area increased in RpACBP3-over- expressing-strains. Correlation analysis revealed significant correlations between most of the indicators,and random forest regression showed that RpACBP3 overexpression had the greatest effects on tobacco indices such as chlorophyll a content,ΦPSIICi,and stomatal area,respectively. In summary,the RpACBP3 over-expression enhanced the light energy utilization of tobacco plants by increasing the chlorophyll content,improving the efficiency of light absorption and transformation by the photosystem,and promoting the stomatal development.

Key words: Robinia pseudoacacia, Nicotiana tabacum, RpACBP3, photosynthetic characteristics, stomata