The Tissue Anatomy Analysis of the Temporary Planting SH40 Interstock Apple Seedling Water Loss during the Period of Dormancy
Currently, SH40 is the major application of apple dwarfing rootstocks in North China.In practice,SH40 interstocks segment of apple seedling temporary planted would have the phenomena that lose water and occur wrinkles first at interstocks segment and then even expand to the whole plant after spring soil thaws which is prejudicial to the production extremely.This study uses annual winter hibernation Fuji/SH40/Robusta as material and research tissue anatomy of the rootstock,SH40 interstocks and the scion.The results showed that:(1)the periderm thickness of the interstock segment was larger than that of other parts significantly,which was one of reasons that caused low epi-dermal transpiration volume.(2)The ratio of wood departmental area/transverse area and wood/bark of interstock segment were less than that of the scion significantly.(3)The lumen diameter of the interstock segment was larger than that of the lumen diameter of scions.Therefore the water flowed from the interstock segment to the scion and roots,which leads shrink and folding phenomena firstly after lifting,when there was water potential difference.
SH40 interstock apple seedlingsshrinktissue anatomy
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