DROUGHT SENSITIVITY OF APPLE ROOTSTOCKS
Attempts were made to compare the drought tolerance of commercial apple (Malus domestica Borkh.) rootstocks M.9, M.26, M.27 and MM.111, and some new selections from the rootstock breeding program at HRI-East Malling (AR 69–7, AR 295–6, AR 360–19, AR 486–1 and AR 628–2), in a glasshouse experiment using non-grafted rootstocks in pots. Considerable differences were evident in their root growth and the ability of rootstocks to partition dry matter to roots which varied in response to a reduction in irrigation. Large decreases in root dry matter were apparent with AR 295–6 and AR 360–19 as the rooting medium dried, while an increase in root growth was evident with M.26. These effects are discussed with respect to the rootstock's ability to acquire and use water.
Atkinson, C.J., Webster, A.D., Policarpo, M., Kuden, A. and Ziraat Fakültesi, C.Ü. (1997). DROUGHT SENSITIVITY OF APPLE ROOTSTOCKS. Acta Hortic. 451, 171-178
drought stress, irrigation, Malus domestica Borkh., rootstock, soil water deficits