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Agronomy
Special Issues
Recent Insights in Physiology of Tree Fruit Production
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Recent Insights in Physiology of Tree Fruit Production

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Horticultural and Floricultural Crops".

Deadline for manuscript submissions: closed (31 August 2024) | Viewed by 3341

Special Issue Editors

Dr. Hao Xu

E-Mail Website
Guest Editor
Summerland Research and Development Centre, Agriculture and Agri-Food Canada, Summerland, BC V0H 1Z0, Canada
Interests: tree fruit physiology; aquaporin; plant ecophysiology; mycorrhiza
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Avi Sadka

E-Mail Website
Guest Editor
Department of Fruit Trees Sciences, Institute of Plant Sciences, ARO, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Isreal
Interests: fruit growth and development; fruit quality; control of alternate bearing; practical aspects of citriculture
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Physiological mechanisms are key to unlock our understanding of the resilience and efficiency of tree fruit production under variable environmental conditions and horticultural mitigations. This Special Issue aims to highlight the recent advances in the following broad physiological topics which are pertinent to the crop performance, yield potential and fruit quality of a variety of tree fruits.

  1. Fruit set, fruit quality, fruit disorder and yield under stresses and horticultural mitigations;
  2. Bud differentiation, alternate bearing, a variety of crop load management measures;
  3. Roles of phytohormones, efficacy of innovative plant growth regulators;
  4. Rootstock–scion interaction, roles of rootstocks and canopy structures in vigor control, resource use and allocation, crop resilience and yield potential;
  5. Plant–water relations, carbohydrate assimilation and partitioning, fruit growth and development.

We invite contributions from the field of ecophysiology and molecular physiology of apple, pear, sweet cherry, peach, citrus and other tree fruits. Research articles, reviews, opinions, communications and methods are welcomed.

Dr. Hao Xu
Prof. Dr. Avi Sadka
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Agronomy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • abiotic stress
  • alternate bearing
  • carbohydrates
  • crop load
  • fruit growth and development
  • fruit set
  • horticultural mitigation
  • phytohormone
  • plant–water relations
  • rootstock

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

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14 pages, 2656 KiB  
Article
Seasonal Changes in Amylose and Starch Compositions in ‘Ambrosia’ Apples Associated with Rootstocks and Orchard Climatic Conditions
by Changwen Lu, Hao Xu, Brenda Lannard and Xiaotang Yang
Agronomy 2023, 13(12), 2923; https://doi.org/10.3390/agronomy13122923 - 28 Nov 2023
Viewed by 1481
Abstract
The dynamics of amylose (AM) and total starch content (TSC) have been studied in several apple varieties; however, their responses to environmental variables and rootstocks are less understood in new low-climacteric varieties. In addition, the pertinence of AM and TSC to fruit dry [...] Read more.
The dynamics of amylose (AM) and total starch content (TSC) have been studied in several apple varieties; however, their responses to environmental variables and rootstocks are less understood in new low-climacteric varieties. In addition, the pertinence of AM and TSC to fruit dry matter content (DMC), fruit quality at harvest, and quality retention after storage is little understood. In this study, we investigated the seasonal changes in AM and TSC of ‘Ambrosia’ apples grafted onto dwarfing rootstocks Malling 9 (M.9) and Budagovsky 9 (B.9) in two consecutive years, 2016 and 2017, in the Okanagan-Similkameen Valley, British Columbia, Canada. Enzymatic methods with Megazyme® kits were used to analyze the fruit samples collected from four orchards in the growing season. In 2016, the orchard microclimate exhibited cooler nights and greater diurnal temperature ranges (DTRs) compared to 2017. As a result, the AM content and AM portion in TSC were significantly higher in 2016, with levels peaking over 40% compared to the values observed in 2017. However, there were no significant differences in peak values of TSC between the two years. Additionally, the apples grown on the B.9 rootstock consistently showed higher levels of AM and AM percentage compared to those grown on the M.9 rootstock. The study also used Felix 750 Produce Quality Meter, a handheld infrared spectrometer, to assess the dry matter content (DMC) of growing fruit, which showed a strong correlation with AM content (r > 0.8). After being harvested at commercial maturity and stored in controlled atmospheric chambers (CA) for 8 months, fruit quality analysis suggested that the AM level and its percentage in TSC played an important role in determining ‘Ambrosia’ apple quality after long-term storage. Full article
(This article belongs to the Special Issue Recent Insights in Physiology of Tree Fruit Production)
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Review

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38 pages, 2357 KiB  
Review
Experimental Designs and Statistical Analyses for Rootstock Trials
by Richard P. Marini
Agronomy 2024, 14(10), 2312; https://doi.org/10.3390/agronomy14102312 - 8 Oct 2024
Cited by 1 | Viewed by 1197
Abstract
Modern agricultural research, including fruit tree rootstock evaluations, began in England. In the mid-1800s, field plots were established at the Rothamsted Research Station to evaluate cultivars and fertilizer treatments for annual crops. By the early 1900s, farmers questioned the value of field experimentation [...] Read more.
Modern agricultural research, including fruit tree rootstock evaluations, began in England. In the mid-1800s, field plots were established at the Rothamsted Research Station to evaluate cultivars and fertilizer treatments for annual crops. By the early 1900s, farmers questioned the value of field experimentation because the results were not always valid due to inadequate randomization and replication and poor data summarization. During the first half of the 20th century, Rothamsted statisticians transformed field plot experimentation. Field trials were tremendously improved by incorporating new experimental concepts, such as randomization rather than systematically arranging treatments, the factorial arrangement of treatments to simultaneously test multiple hypotheses, and consideration of experimental error. Following the classification of clonal apple rootstocks at the East Malling Research Station in the 1920s, the first rootstock trials were established to compare rootstocks and evaluate rootstock performance on different soil types and with different scion cultivars. Although most of the statistical methods were developed for annual crops and perennial crops are more variable and difficult to work with, rootstock researchers were early adopters of these concepts because the East Malling staff included both pomologists and statisticians. Many of the new statistical concepts were incorporated into on-farm demonstration plots to promote early farmer adoption of new practices. Recent enhancements in computing power have led to the rapid expansion of statistical theory, the development of new statistical methods, and new statistical programming environments, such as R. Over the past century, in many regions of the world, the adoption of new statistical methods has lagged their development. This review is intended to summarize the adoption of error-controlling experimental designs by rootstock researchers, to describe statistical methods used to summarize the resulting data, and to provide suggestions for designing and analyzing future trials. Full article
(This article belongs to the Special Issue Recent Insights in Physiology of Tree Fruit Production)
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