桃3种砧木次生木质部导管分子性状比较

为桃树抗寒砧木的选择提供参考依据,采用组织离析、显微照相与生物计量统计法,检测并比较了山桃(Prunus davidiana)(SP)、毛桃(P.persica)(MP)和珲春桃(P.persica cv.Hun-chun-tao)(HP)3种桃砧木根与茎导管分子形态和大小。结果表明,3种桃砧木导管分子性状相比较,根与茎导管分子侧壁次生增厚和木质化的方式、纹孔式、穿孔板类型以及其根一端具尾的导管分子比例基本相似,其茎导管分子均具有螺旋加厚现象,但是,两端具尾、一端具尾、两端无尾、两端倾斜、一端倾斜和两端水平的导管分子比例以及导管分子的长度与直径、根与茎导管分子长度与直径的比率均存在差异。     

Performance of peach and plum based rootstocks of different vigour on a late peach cultivar in replant and calcareous conditions

The field performance of fifteen peach and plum based rootstocks of different vigour (Adesoto, Evrica, Garnem, GF 677, HM-2, Krymsk^® 1, PAC 9801-02, PAC 960, PAC 9907-02, PAC 9917-26, PAC-MUT, PADAC 9907-23, ROOTPAC^® 40, ROOTPAC^® 70 and Tetra) grafted with ‘Calrico’ cultivar was compared after 7 years of establishment on an Armillaria infested replant site. ‘Calrico’ is a selected clone of “Calanda” late peach cultivar. Differences in parameters such as tree survival, leaf chlorophyll content, vigour, yield, cumulative yield, yield efficiency and fruit size were analyzed among rootstocks. All PAC 9801-02 and Tetra trees survived and the mortality rate was low in Evrica, PADAC 9907-23 and ROOTPAC^® 40. The rest of genotypes showed higher mortality rates. Leaf chlorophyll concentration was higher when grafted on Adesoto and Evrica and lower when grafted on PAC 9907-02 and PAC 9917-26. Garnem and PADAC 9907-23 were the most vigorous rootstocks. The highest yield efficiency was induced by Krymsk^® 1 and PAC 9801-02 due to their lower vigour. The highest fruit weight was also induced by Krymsk^® 1 but its cumulative yield was low. Other rootstocks that showed high fruit weight and cumulative yields were ROOTPAC^® 70 and Tetra. Overall, Evrica, PAC 9801-02, ROOTPAC^® 40 and Tetra were among the best adapted to soil sickness and calcareous soil showing a good agronomic performance. The first three rootstocks (Evrica, PAC 9801-02, ROOTPAC^® 40) also exhibited a high capacity to control tree vigour associated with high yield efficiency.     

Influence of nine dwarfing apple rootstocks on vigour and productivity of apple cultivar ‘Granny Smith’

The influence of nine dwarf apple rootstocks (M.9 T 984, M.9 T 337, Jork 9, Mark 9, Budagowski 9, M.9 EMLA, Pajam 1, Pajam 2, and Supporter 4) on the vegetative characteristics, yield and yield efficiency, was evaluated on ‘Granny Smith’ apple variety (Malus domestica Borkh.).