Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (5): 945-957.doi: 10.16420/j.issn.0513-353x.2021-0671

• Research Papers •     Next Articles

Comparative Study on Drought Resistance of Different Apple Dwarfing Rootstock and Scion Combinations

FENG Chen1, HUANG Xuewang1, LI Xingliang2, ZHOU Jia2, LI Tianhong1,**()   

  1. 1State Key Laboratories of Agrobiotechnology,College of Horticulture,China Agricultural University,Beijing 100193,China
    2Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(North China),Ministry of Agriculture and Rural Affairs,Institute of Forestry and Pomology,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100093,China
  • Received:2022-01-12 Revised:2022-05-16 Online:2022-05-25 Published:2022-05-24
  • Contact: LI Tianhong


To evaluate the effect of apple dwarfing rootstocks on the scion growth and drought resistance,we used four-year-old apple trees with different scion-rootstock combinations(‘Fuji’/G935,‘Fuji’/M9-T337 and‘Fuji’/SH6). Morphology analysis of these three apple trees showed that‘Fuji’scion grown on SH6 exhibited significantly reduced leaf thickness,palisade tissue thickness and stomatal density compared with the‘Fuji’grafted on G935 and M9-T337. Furthermore,three kinds of apple trees were exposed to drought stress treatment for determining their drought tolerance and recovery feature after re-watering. The analysis of drought-related physiology parameters indicated that compared with the other two grafted combinations,the‘Fuji’/SH6 combination displayed enhanced water use efficiency(WUE),osmoregulation substance content,superoxide dismutase(SOD)activity and ABA content,and the reduced malondialdehyde(MDA)content,net photosynthetic rate(Pn),transpiration rate(Tr)and stomatal conductance(Gs)under drought stress. The results of membership function analysis showed that‘Fuji’/SH6 had the optimal drought resistance,followed by‘Fuji’/G935,and‘Fuji’/M9-T337 had the worst drought resistance. Overall,‘Fuji’/SH6 grafted combination showed excellent drought resistance.

Key words: apple, dwarfing, rootstock and scion, drought resistance, membership function

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