Abstract
(1) Background: The cultivation of resistant rootstocks is an effective way to prevent ARD. (2) Methods: 12-2 (self-named), T337, and M26 were planted in replanted and sterilized soil. The aboveground physiological indices were determined. (3) Results: The plant heights and the stem thicknesses of T337 and M26 were significantly affected by ARD. Relative chlorophyll content (June–October), Pn (August–September), and Gs (August) of T337 and relative chlorophyll content (June–July, September), Pn (September–October), and Ci (September) of M26 were significantly affected by ARD. ARD had a significant effect on Fv/Fm (June), qP (June–July), and NPQ of T337 (June–October, except August) and Fv/Fm (June) and NPQ (June-October, except July) of M26. Additionally, ARD affected Rfd of M26 and T337 during August. SOD (August and October), POD (August–September), and CAT (July-August, October) activities and MDA (September–October) content of T338 as well as SOD (July–October), POD (June–October), and CAT (July-October) activities and MDA (July, September–October) content of M26 were significantly affected by ARD. ARD significantly reduced nitrogen (October), phosphorus (September–October), and zinc (July) contents of M26 and potassium (June) content of T337. The above physiological indices were not affected by ARD in 12-2. (4) Conclusions: 12-2 could be useful as an important rootstock to relieve ARD due to strong resistance.
Highlights
Apple replant disease (ARD), known as soil sickness [1,2], refers to the phenomenon that, when the same or closely related crops are continuously planted on the same piece of land, yield decreases, quality deteriorates, and growth status is lessened under normal management [3]
ARD had a significant effect on T337 and M26 plant height (Table 1) and stem diameters (Table 2) from June to October but no significant effect on 12-2
From June to October, compared with their respective controls in the replanted soil, the plant heights of T337 in the sterilized soil increased by 20.59%, 29.96%, 46.00%, 43.23%, and 41.43%, respectively, and the stem diameters increased by 17.92%, 18.31%, 23.10%, 13.65%, and
Summary
Apple replant disease (ARD), known as soil sickness [1,2], refers to the phenomenon that, when the same or closely related crops are continuously planted on the same piece of land, yield decreases, quality deteriorates, and growth status is lessened under normal management [3]. The problem of replanting old orchards is becoming more and more common, and major apple-producing areas in the world are facing ARD [5]. About 50% of the apple orchards in the UK, New Zealand, and Poland have ARD [6]. How to effectively improve the effect of ARD on apple is a problem that needs to be solved
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
