Article
Agronomy
Mehdi Rezaei, Abbas Rohani
Summary: Winter frost injury is a major constraint for olive cultivation in temperate regions, and the response of olive shoots to freezing stress can be utilized for selecting frost-resistant genotypes. The electrolyte leakage (EL) and tetrazolium tests (TZ) are commonly employed to assess tissue damage caused by cold stress. In this study, we evaluated the accuracy and efficiency of eighteen nonlinear regression models (NLRs) in calculating LT50 and LT90 for different olive cultivars at different dormancy stages. Our findings demonstrate that only eight out of the eighteen models examined were suitable for this research purpose. The 2p-logistic and Gompertz models were chosen to model EL and TZ, respectively. Furthermore, our research highlights the superior performance of Roughani, Kawi, and Zard varieties of olive trees under artificial temperature-controlled conditions, providing important insights for selecting frost-resistant cultivars and designing effective strategies for cold acclimation in olive cultivation.
Article
Horticulture
Safoora Saadati, Bahram Baninasab, Mostafa Mobli, Mahdiyeh Gholami
Summary: The research showed that foliar application of potassium sulphate could significantly enhance the freezing tolerance of olives by increasing FT and altering the biochemical pathways, contributing to improving the olive's freezing tolerance.
SCIENTIA HORTICULTURAE
(2021)
Article
Plant Sciences
Jahad Soorni, Seyed Kamal Kazemitabar, Danial Kahrizi, Ali Dehestani, Nadali Bagheri, Attila Kiss, Peter Gergo Kovacs, Istvan Papp, Iman Mirmazloum
Summary: In this study, cold-acclimated and non-acclimated Camelina biotypes were compared for stress-associated biomarkers and gene expression. The results showed that cold acclimation had a positive effect on freezing tolerance, increasing the protein and proline content in stressed plants. Freezing stress significantly affected antioxidant enzyme activity and gene expression.
Article
Plant Sciences
Ji Qian, Juan Zhou, Ruijuan Gong, Yang Liu, Gang Zhang
Summary: The study evaluated freezing resistance of floribunda roses during frost dehardening using EIT technique. The reconstructed values from EIT images showed linear correlation with traditional electrolyte leakage method results, providing a reference for non-destructive and rapid detection of plant freezing resistance.
Article
Biochemical Research Methods
Alisson P. Kovaleski, Jake J. Grossman
Summary: The electrolyte leakage method is widely used in assessing plant tissue cold hardiness, with standardizing raw data proving to be crucial for reliable estimation of cold hardiness at the species level and across diverse systems. The use of liquid nitrogen control enhances the consistency and realism of the method, especially for very cold hardy samples. Data from studies using this control method can still be compared to previously published data when standardized using the best-performing approach.
Article
Plant Sciences
Samikshya Bhattarai, Joshua T. Harvey, Desire Djidonou, Daniel I. Leskovar
Summary: Texas tomato production is vulnerable to extreme heat in the spring-summer cropping period, and the lack of superior genetic materials exacerbates this issue. Therefore, there is a need to select superior varieties that can perform well in warm environments and exhibit high yield stability under heat stress conditions. This research aimed at identifying heat-tolerant varieties through controlled and open-field environments in three stages.
Article
Plant Sciences
Tapani Repo, Julien Ballandras, Jouni Kilpelainen, Dongxia Wu, Timo Domisch
Summary: The condition of the root system has an impact on the quality of seedlings in forestry and horticulture. This study investigated the changes in electrical impedance loss factor (delta) and reverse-flow hydraulic conductance (K-r) of Scots pine seedlings' roots after frost damage. The experiment concluded that the impedance loss factor could detect root damage if measured early enough, while the reverse-flow hydraulic conductance required a longer time difference (3-5 weeks) after the damage.
PHYSIOLOGIA PLANTARUM
(2023)
Article
Biotechnology & Applied Microbiology
Khadija Aaliya, Idrees Ahmad Nasir, Anwar Khan, Nida Toufiq, Iqra Yousaf, Olawale Samuel Adeyinka, Sehrish Iftikhar, Abdul Munim Farooq, Bushra Tabassum
Summary: This study demonstrates the potential for improving frost tolerance in transgenic potato lines through the introduction of the IRI3 gene, resulting in reduced ion leakage and better cold resistance in the transgenic potato lines under freezing conditions.
JOURNAL OF BIOTECHNOLOGY
(2021)
Article
Horticulture
Ying-Che Lee, Che-Wei Chang, Min-Chi Hsu, Hsing-Ying Chung, Yu Shen Liang
Summary: This study investigates the physiological and quality changes in wax apples during storage and establishes suitable controlled atmosphere (CA) storage conditions. The results indicate that storage at 1% O2 leads to odor and affects taste. Storage at 1%, 3%, and 5% O2 significantly reduces chilling injury and delayed electrolyte leakage. Storage at 3% O2 + 1% CO2 or 5% O2 + 1% CO2 helps preserve phenolic and anthocyanin content, delaying electrolyte leakage and chilling injury, thereby increasing salability after 28-day storage. Therefore, a temperature of 10 degrees C with 3%-5% O2 + 1% CO2 is considered favorable for long-term storage of wax apples.
SCIENTIA HORTICULTURAE
(2023)
Article
Plant Sciences
Emad Hamdy Khedr, Nagwa Khedr, Mohamed Abdel-Haleem
Summary: This study compares the effects of PPCP and MT as anti-ethylene agents on postharvest quality of mango fruits. The results show that both PPCP and MT treatments can effectively reduce chilling injury and preserve fruit quality.
Article
Agronomy
Ahmad Nezami, Jafar Nabati, Seyedeh Mahboube Mirmiran, Alireza Hasanfard, Mohammad Mohammadi
Summary: This study investigated the physiological response of desi-type chickpea germplasm during cold acclimation and its relationship with freezing tolerance. A genotype with higher accumulation potential of anthocyanins, proline, and DPPH showed lower electrolyte leakage and 100% survival. Most of the germplasm maintained 100% survival, and there was no significant correlation between metabolite content and survival percentage after freezing stress. Principal component analysis revealed that morphological parameters were better indicators of freezing tolerance than metabolites.
Article
Horticulture
Wei-Ling Chen, Yi-Ting Ko
Summary: In this study, the researchers investigated the efficiency and mechanism of chilling tolerance induced by transient oxidative shock with H2O2 pretreatment in Phalaenopsis seedlings, finding that the pretreatment reduced chilling injury. Different concentrations and frequencies of H2O2 pretreatment had varying effects on chilling tolerance and plant morphology. The findings suggest that the exogenous H2O2-induced chilling tolerance in Phalaenopsis seedlings may involve the glutathione-related oxidant defense system.
SCIENTIA HORTICULTURAE
(2021)
Article
Horticulture
Misun Kim, Seok Kyu Yun, Sang Suk Kim, YoSup Park, Jaeho Joa, Seunggab Han, Kihye Shin, Kwan Jeong Song
Summary: Global warming is impacting the freezing tolerance of citrus grown in Korea, making it important to determine the LT50 values for different varieties. Factors such as genotype, environmental conditions, cultivation methods, and wind speed can affect the LT50 values. Exposure to freezing temperatures can also impact the biochemical properties of citrus fruits.
HORTICULTURE ENVIRONMENT AND BIOTECHNOLOGY
(2021)
Article
Plant Sciences
Karolin Eisenschmid, Sarina Jabbusch, Marcus A. Koch
Summary: As global warming continues, plants need to adapt to changing environmental conditions. This study compared the freezing tolerance of different Ionopsidium and Cochlearia species and found that geographically distant species showed similar cold responses. The results suggest that physiological adaptations to other stressors, such as salinity and drought, may contribute to improved cold tolerance in plants.
PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS
(2023)
Article
Chemistry, Applied
Roujia Zhang, Fuyuan Ding, Yang Zhang, Chenguang Zhou, Wen Zhang, Jiyong Shi, Xiaobo Zou, Jianbo Xiao
Summary: The study found that pulsed electric field assisted freezing treatment can reduce the phase change time of rice flour gel and lead to the formation of rounder and smaller ice crystals. Salt was proven to be an effective additive for increasing the relative permittivity of rice flour gel.
Article
Agronomy
Xiuwei Liu, Xuejun Dong, Qingwu Xue, Daniel I. Leskovar, John Jifon, John R. Butnor, Thomas Marek
Article
Forestry
Peter H. Anderson, Kurt H. Johnsen, John R. Butnor, Carlos A. Gonzalez-Benecke, Lisa J. Samuelson
FOREST ECOLOGY AND MANAGEMENT
(2018)
Article
Agronomy
John R. Butnor, Brittany M. Verrico, Victor Vankus, Stephen R. Keller
SEED SCIENCE AND TECHNOLOGY
(2018)
Article
Plant Sciences
John R. Butnor, Brittany M. Verrico, Kurt H. Johnsen, Christopher A. Maier, Victor Vankus, Stephen R. Keller
Article
Forestry
John R. Butnor, Kurt H. Johnsen, Christopher A. Maier, C. Dana Nelson
Article
Evolutionary Biology
Thibaut Capblancq, John R. Butnor, Sonia Deyoung, Ethan Thibault, Helena Munson, David M. Nelson, Matthew C. Fitzpatrick, Stephen R. Keller
EVOLUTIONARY APPLICATIONS
(2020)
Article
Environmental Sciences
X. Liu, J. Chen, J. R. Butnor, G. Qin, X. Cui, B. Fan, H. Lin, L. Guo
WATER RESOURCES RESEARCH
(2020)
Article
Biodiversity Conservation
Thibaut Capblancq, Helena Munson, John R. Butnor, Stephen R. Keller
Summary: The study found that genetic diversity has a positive impact on early-life seedling fitness in red spruce, while genetic load and population-level inbreeding have a negative impact. Specifically, in the highly fragmented populations in the Central and Southern Appalachians, low genetic diversity and high inbreeding are associated with lower germination rate, shorter height, and reduced early-life fitness of the seedlings.
CONSERVATION GENETICS
(2021)
Article
Agronomy
Huijie Gu, Liantao Liu, John R. Butnor, Hongyong Sun, Xiying Zhang, Cundong Li, Xiuwei Liu
Summary: The study found that under dry conditions, root capacitance (ECroot) was significantly reduced after root cutting, and that incorporating root tissue density and soil moisture into the prediction model can improve the accuracy of ECroot. In contrast, ECroot was less affected by root cutting under wet soil conditions, suggesting that it may not directly measure roots in these conditions.
Article
Geochemistry & Geophysics
Xinbo Liu, Li Guo, Xihong Cui, John R. Butnor, Elizabeth W. Boyer, Dedi Yang, Jin Chen, Bihang Fan
Summary: In this study, ground-penetrating radar (GPR) was used to noninvasively characterize root water content (RWC) of coarse roots. An automatic GPR data processing framework was proposed to identify root reflections and extract waveform parameters to determine RWC. The developed models achieved good performance in estimating RWC with high accuracy, especially when applied to 2-GHz data.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Biology
Anoob Prakash, Sonia DeYoung, Susanne Lachmuth, Jacquelyne L. Adams, Kurt Johnsen, John R. Butnor, David M. Nelson, Matthew C. Fitzpatrick, Stephen R. Keller
Summary: This study examines the genetic and plastic variation levels of red spruce populations in response to climate change. The findings suggest that red spruce has some genetic variation and plasticity, but the plasticity of its phenology traits may have negative impacts on growth under warmer climates.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Multidisciplinary Sciences
Yong Zhou, Jenia Singh, John R. Butnor, Corli Coetsee, Peter B. Boucher, Madelon F. Case, Evan G. Hockridge, Andrew B. Davies, A. Carla Staver
Summary: This study provides one of the first direct estimates of the impact of over 60 years of fire exclusion in African savannas, showing that fire suppression can increase whole-ecosystem carbon storage but to a lesser extent than previously assumed, with significant belowground carbon reserves being overlooked.
Article
Ecology
Lisa J. Samuelson, Thomas A. Stokes, John R. Butnor, Kurt H. Johnsen, Carlos A. Gonzalez-Benecke, Timothy A. Martin, Wendell P. Cropper, Pete H. Anderson, Michael R. Ramirez, John C. Lewis
ECOLOGICAL APPLICATIONS
(2017)
Article
Forestry
Paul G. Schaberg, Paula F. Murakami, John R. Butnor, Gary J. Hawley
CANADIAN JOURNAL OF FOREST RESEARCH
(2017)