Translator Disclaimer
31 July 2019 Physiological responses of four apple (Malus × domestica Borkh.) rootstock genotypes to soil water deficits
Author Affiliations +
Abstract

The use of drought-tolerant rootstocks is an important strategy in maintaining orchard productivity while meeting the increasing need to conserve water resources. The drought tolerance of two new genotypes, Vineland 1 (V.1) and Vineland 3 (V.3), was assessed along with industry standards to test the hypothesis that differences in water-use efficiency exist among these apple rootstocks. One-year-old, non-grafted nursery liners of M.9, MM.111, V.1, and V.3 were grown in a controlled-environment experiment. Plants of each genotype were maintained water-replete or were subjected to a 9-d controlled dry down and then maintained under water stress conditions for 55 d. Water stress reduced biomass accumulation and trunk cross-sectional area for all four genotypes. The two vigorous genotypes, MM.111 and V.1, increased their root-to-shoot ratios in response to water stress, whereas the root-to-shoot ratios of M.9 and V.3 remained unchanged in their water-replete controls. Genotype V.3 maintained its transpiration at a significantly lower soil water content compared to M.9, MM.111, and V.1. Of the four genotypes, V.3 demonstrated a high tolerance to water stress conditions, and therefore deserves further investigation using grafted apple trees in an orchard study.

Copyright remains with the author(s) or their institution(s). Permission for reuse (free in most cases) can be obtained from Rightslink.
D.E.J. Wright, J.A. Cline, and H.J. Earl "Physiological responses of four apple (Malus × domestica Borkh.) rootstock genotypes to soil water deficits," Canadian Journal of Plant Science 99(4), 510-524, (31 July 2019). https://doi.org/10.1139/cjps-2018-0276
Received: 4 November 2018; Accepted: 5 February 2019; Published: 31 July 2019
JOURNAL ARTICLE
15 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top