Next Article in Journal
Polyphenol Diversity and Antioxidant Activity of European Cistus creticus L. (Cistaceae) Compared to Six Further, Partly Sympatric Cistus Species
Next Article in Special Issue
Ectomycorrhizal Inoculation Enhances the Salt Tolerance of Quercus mongolica Seedlings
Previous Article in Journal
Transgenic Expression of dsRNA Targeting the Pentalonia nigronervosa acetylcholinesterase Gene in Banana and Plantain Reduces Aphid Populations
Article

Rootstocks with Different Vigor Influenced Scion–Water Relations and Stress Responses in AmbrosiaTM Apple Trees (Malus Domestica var. Ambrosia)

Summerland Research and Development Centre, Agriculture and Agri-Food Canada, Summerland, BC V0H 1Z0, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Sergio Tombesi
Plants 2021, 10(4), 614; https://doi.org/10.3390/plants10040614
Received: 2 February 2021 / Revised: 23 February 2021 / Accepted: 16 March 2021 / Published: 24 March 2021
In recent years, awareness has been raised around the benefits of diversifying rootstocks, in order to enhance tree health and sustain apple fruit production under the influence of climate change. However, performances of many rootstocks under stresses remain unclear. This study aimed to set the first step towards a much-needed comprehensive evaluation on water relationships and stress responses of scion–rootstock systems for the popular apple cultivar AmbrosiaTM (Malus domestica var. Ambrosia), because its production and horticultural knowledge had been largely limited to the Malling 9 rootstock (M.9). Five rootstocks were evaluated in a greenhouse water deficit experiment and at the onset of heat stress in a field trial in Summerland, British Columbia, Canada. Multiple stress indicators of leaves and fruits were analyzed to elucidate water use strategies and drought resistance mechanisms. The rootstocks led to differences in scion vigor, and stomatal and photosynthetic characteristics. The largest semi-dwarfing Geneva 202 (G.202) demonstrated more water use and higher stress susceptibility. Large dwarfing Geneva 935 (G.935) and Malling 26 (M.26) showed more stringent stomatal control and reduced water use under stresses, typical of a drought-avoidance strategy. The smallest large dwarfing M.9NIC29® and the small dwarfing Budagovsky 9 (B.9) led to smaller and denser stomata. B.9 demonstrated the most stable water status and drought tolerance. The study suggested that scion stress responses were influenced by rootstock vigor and tree water use strategies. It implied the necessity of vigor-specific irrigation management for alleviating stresses and achieving production goals of different rootstocks. View Full-Text
Keywords: drought resistance; dwarfing rootstock; heat stress; leaf gas exchanges; stomatal characteristics; water use strategy drought resistance; dwarfing rootstock; heat stress; leaf gas exchanges; stomatal characteristics; water use strategy
Show Figures

Graphical abstract

MDPI and ACS Style

Xu, H.; Ediger, D. Rootstocks with Different Vigor Influenced Scion–Water Relations and Stress Responses in AmbrosiaTM Apple Trees (Malus Domestica var. Ambrosia). Plants 2021, 10, 614. https://doi.org/10.3390/plants10040614

AMA Style

Xu H, Ediger D. Rootstocks with Different Vigor Influenced Scion–Water Relations and Stress Responses in AmbrosiaTM Apple Trees (Malus Domestica var. Ambrosia). Plants. 2021; 10(4):614. https://doi.org/10.3390/plants10040614

Chicago/Turabian Style

Xu, Hao, and Danielle Ediger. 2021. "Rootstocks with Different Vigor Influenced Scion–Water Relations and Stress Responses in AmbrosiaTM Apple Trees (Malus Domestica var. Ambrosia)" Plants 10, no. 4: 614. https://doi.org/10.3390/plants10040614

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop