Effects of Different Dwarfing Interanvils on Photosynthetic Characteristics of Apple Leaves
In order to investigate the effects of different dwarfing interanvils on the photosynthetic characteristics of apple leaves,the experiment was conducted from January 2021 to August 2022 with Shandingzi as the base anvil,Mark,M26,M9,CG80 as the inter-anvil,and Shandingzi grafted Hanfu as the control group.There were 15 plants in each intermediate anvil group with 3 replicates per group and 5 plants per replicate.The photosynthetic characteristics of leaves in each intermediate anvil group were measured after the experiment.The results showed that the net photosynthetic rate of M26 and M9 was the highest,which was significantly higher than that of Mark and CG80(P<0.05),and extremely significantly higher than that of control group(P<0.01).The stomatal conduc-tance of M26 and M9 was the lowest,and significantly lower than that of control group,and significantly lower than that of Mark and CG80(P<0.05).The intercellular CO2 concentration in Mark,M26 and M9 was the lowest,which was significantly lower than that in control group(P<0.01),and significantly lower than that in CG80(P<0.05).The transpiration rate of M26 was the lowest,fol-lowed by M9,which was significantly lower than that of control group(P<0.01),and significantly lower than that of Mark and CG80(P<0.05).Water use efficiency(WUE)in M26 was the highest,followed by M9,which was significantly higher than that in control group(P<0.01),and significantly higher than that in Mark and CG80(P<0.05).The specific leaf weight,chlorophyll a,chlorophyll b and chlorophyll a+b of M26 and M9 were significantly higher than those of control group(P<0.01),and significantly higher than those of Mark and CG80(P<0.05).Chlorophyll a/b M26 and M9 were significantly higher than those in Mark,CG80 and control group(P<0.05).Carotenoid dwarfing interanvil treatment group was significantly higher than control group(P<0.05),and M26 and M9 had the highest values.The results indicated that M26 and M9 dwarfing interanvils had the best effect on improving the photo-synthesis of apple leaves.
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