Work

Rootstock Induced Vigour is Associated with Physiological, Biochemical and Molecular Changes in ‘Red Fuji’ Apple

Year: 2020

Type: article

Abstract: High-density apple cultivation is favoured by the utilization of dwarfing rootstocks.Evaluation of physiological and biochemical response indicators is essential for early screening of superior dwarfing rootstocks.Here, we investigated the effect of "M.9", "M.26", "Chistock-1"and "Baleng" rootstocks on growth performance, photosynthesis, biochemical and molecular indices of the "Red Fuji" scion after 45, 90, and 180 days of grafting (DAG).Apple scion grafted onto "M.9" rootstock had the lowest plant height and reduced scion diameter and the lowest hydraulic conductance (K leaf ), whereas trees grafted onto "M.26", "Chistock-1" and "Baleng" rootstocks were taller and had better scion diameter and hydraulic conductance.In addition, leaf P, K, Mg, Cu, Mn, and Zn concentration was minimum for plants grafted onto "M.9" rootstock that likely reduced the growth rate.Furthermore, we observed that trees grafted onto "M.9" rootstock had lower photosynthesis rate (P n ) compared with "M.26", "Chistock-1", and "Baleng" rootstocks.The hormonal and gene expression analysis indicated that there were lower amounts of indole-3-acetic acid (IAA) and zeatin riboside (ZR) and expressions of YUCCA10a and IPT3A in the leaf and roots of "M.9" rootstock compared with "M.26", "Chistock-1", and "Baleng" rootstocks.The results of this study can be useful in apple breeding programs to forecast the dwarfing ability at an early stage of growth and development of grafted plants.

Source: International Journal of Agriculture and Biology

DOI: 10.17957/ijab/15.1627