Zhu Bo, Guo Peipei, Wu Shuangshuang, Yang Qingjing, He Feng, Gao Xuan, Zhang Ya, Xiao Jiaxin
Anhui Provincial Key Laboratory for the Conservation and Utilization of Important Biological Resources, College of Life Sciences, Anhui Normal University, Wuhu 241000, China.
Plants (Basel). 2024 Feb 24;13(5):625. doi: 10.3390/plants13050625.
To further clarify the impact of different rootstocks in grafted blueberry, fruit quality, mineral contents, and leaf gas exchange were investigated in 'O'Neal' blueberry () grafted onto 'Anna' () (AO), 'Sharpblue' () (SO), 'Baldwin' () (BO), 'Plolific' () (PO), and 'Tifblue' () (TO) rootstocks and own-rooted 'O'Neal' (NO), and differences in anatomic structures and drought resistance were determined in AO, TO, and NO. The findings revealed that fruit quality in TO and PO was excellent, that of BO and SO was good, and that of AO and NO was medium. 'Tifblue' and 'Plolific' rootstocks significantly increased the levels of leaf phosphorus and net photosynthetic rate of 'O'Neal', accompanied by a synchronous increase in their transpiration rates, stomatal conductance, and intercellular CO. Additionally, the comprehensive evaluation scores from a principal component analysis based on anatomic structure traits from high to low were in the order TO > AO > NO. The P (xylem water potential at 50% loss of hydraulic conductivity) values of these grafted plants descended in the order NO > AO > TO, and the branch hydraulic conductivity of TO and sapwood hydraulic conductivity of TO and AO were significantly lower than those of NO. Thus, TO plants exhibited the strongest drought resistance, followed by AO, and NO, and this trait was related to the effects of different rootstocks on the fruit quality of 'O'Neal' blueberry. These results provided a basis for a deeper understanding of the interaction between rootstocks and scions, as well mechanisms to improve blueberry fruit quality.
为进一步阐明不同砧木对蓝莓嫁接苗的影响，对嫁接在‘安娜’（Anna）（AO）、‘夏普蓝’（Sharpblue）（SO）、‘鲍德温’（Baldwin）（BO）、‘多产’（Plolific）（PO）和‘梯芙蓝’（Tifblue）（TO）砧木上的‘奥尼尔’（O'Neal）蓝莓以及自根‘奥尼尔’（NO）的果实品质、矿物质含量和叶片气体交换进行了研究，并测定了AO、TO和NO的解剖结构差异及抗旱性。研究结果表明，TO和PO的果实品质优良，BO和SO的果实品质良好，AO和NO的果实品质中等。‘梯芙蓝’和‘多产’砧木显著提高了‘奥尼尔’叶片的磷含量和净光合速率，同时其蒸腾速率、气孔导度和胞间CO也同步增加。此外，基于解剖结构性状的主成分分析综合评价得分由高到低依次为TO＞AO＞NO。这些嫁接植株的P（水力传导率损失50%时的木质部水势）值依次为NO＞AO＞TO，TO的枝条水力传导率和TO与AO的边材水力传导率显著低于NO。因此，TO植株的抗旱性最强，其次是AO和NO，这一特性与不同砧木对‘奥尼尔’蓝莓果实品质的影响有关。这些结果为深入了解砧木与接穗之间的相互作用以及提高蓝莓果实品质的机制提供了依据。
