Article
Plant Sciences
Youyue Li, Xiangkai You, Zhe Tang, Tianqi Zhu, Bowen Liu, Mo-Xian Chen, Yuefei Xu, Tie-Yuan Liu
Summary: In this study, plant growth-promoting rhizobacteria (PGPR) were isolated from the salt-treated rhizosphere of tall fescue. Bacillus zanthoxyli was found to play an important role in the growth and salt tolerance of tall fescue.
PHYSIOLOGIA PLANTARUM
(2022)
Article
Agricultural Engineering
Tianqi Zhu, Liang Zhang, Zizheng Yan, Bowen Liu, Youyue Li, Xiangkai You, Mo-Xian Chen, Tie -Yuan Liu, Yuefei Xu, Jianhua Zhang
Summary: This study investigated the variations in microbiome composition and abundance in different plant compartments of salt-tolerant tall fescue cultivars under salt stress. The results showed that salt stress significantly influenced the microbiome composition and diversity in different compartments, with bacteria showing more significant changes than fungi. The research also highlighted the role of the microbes in enhancing plant salt tolerance and biomass accumulation.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Microbiology
Aino Kalske, Kari Saikkonen, Marjo Helander
Summary: Vertically transmitted endophytic fungi can mitigate salinity effects on host grass and alter competitive interactions. Experimentally, tall fescue plants without endophytic fungi grew larger under salt treatment, but there was no difference in control treatment. In the common garden, plants without endophytic fungi grew taller and were more likely to flower, but no difference was observed under salinity or competition conditions.
Article
Plant Sciences
Shyamal K. Talukder, Md Shofiqul Islam, Nick Krom, Junil Chang, Malay C. Saha
Summary: Tall fescue is an important cool-season perennial forage grass in the United States, with its production and persistence being significantly affected by drought in the south-central region. Through genome-wide association analysis, 26 putative drought responsive marker-trait associations were identified, providing a basis for marker-assisted selection to improve drought tolerance in tall fescue. The study also identified 10 orthologous genes in Brachypodium genome as potential candidates for drought tolerance in tall fescue, opening avenues for further research in this area.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Xiaxiang Zhang, Rui Xing, Yunjia Ding, Jingjin Yu, Ruying Wang, Xiaohui Li, Zhimin Yang, Lili Zhuang
Summary: This study identified FaGA2ox4 as a gene with the highest expression level in tall fescue under drought stress. Transgenic rice plants overexpressing FaGA2ox4 exhibited a dwarf and high-tillering phenotype, and also showed improved drought stress tolerance.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2023)
Article
Plant Sciences
Yao Chen, Yuanhang Xiang, Zhengrong Hu, Yang Gao, Youxin Zhang, Minghui Chen, A. B. M. Khaldun, Xuebing Yan, Jibiao Fan
Summary: This study investigates the physiological and molecular mechanisms of exogenous 24-epibrassinolide (EBL) on salt stress response in tall fescue. The results show that EBL improves the salt tolerance of tall fescue by reducing electrolyte leakage and malondialdehyde production, and increasing chlorophyll content and antioxidant enzyme activity. Transcriptomic profiling analysis reveals that EBL regulates various differentially expressed genes involved in binding, catalytic activity, cellular process, metabolic process, cellular anatomical entity, and plant hormone signal transduction pathway.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Jingjin Yu, Ningli Fan, Tian Hao, Yingjie Bian, Lili Zhuang, Qiuguo Li, Zhimin Yang
Summary: Drought stress is a major environmental factor that causes physiological and biochemical damages in plants. This study investigated the effectiveness of foliar application of ethionine (ETH) in improving drought tolerance and revealed how it alleviates drought stress. The results showed that foliar application of ETH effectively mitigated drought damages by enhancing root viability, antioxidant enzyme activities, soluble sugar contents, and isopentenyladenosine levels in tall fescue.
PLANT GROWTH REGULATION
(2023)
Article
Plant Sciences
Manohar Chakrabarti, Padmaja Nagabhyru, Christopher L. Schardl, Randy D. Dinkins
Summary: Tall fescue, known for its drought resistance, may benefit from its seed-borne fungal symbiont Epichloe coenophiala. Genes in the crown show higher differential expression, potentially aiding in survival of the apical meristems.
Article
Agronomy
Krishna B. Katuwal, Somerville Rowe, David Jespersen
Summary: Heat stress damages cool-season turfgrasses like tall fescue, but exogenous application of ALA can improve heat stress tolerance by increasing chlorophyll levels and reducing oxidative damage. ALA-treated tall fescue showed better visual characteristics, higher chlorophyll levels, and improved photosynthetic performance under heat stress, showcasing reduced oxidative damage.
Article
Agronomy
Blair L. Waldron, Kevin B. Jensen, Michael D. Peel, Valentin D. Picasso
Summary: This experiment examined the genetic parameters of resilience to water deficit in tall fescue and found that resilience was measurable and moderately heritable. The study indicated that breeding for improved resilience may have little effect on forage mass at any given individual water deficit environment.
Article
Biochemistry & Molecular Biology
Elham Esmailpourmoghadam, Hassan Salehi, Nasrin Moshtaghi
Summary: Understanding the physiological mechanisms and gene expression patterns in tall fescue under different stress combinations is crucial for stress resistance breeding. This study identified four drought- and salt-responsive genes and found that their expression is correlated with osmotic homeostasis. The expression of these genes is positively correlated with certain physiological parameters, such as Pro, SSs, IL, DPPH, and antioxidant enzyme activity, and negatively correlated with others, such as RWC, total Chl, and MSI. The study also showed that the combination of stresses led to increased reactive oxygen species and antioxidant enzyme activities in tall fescue plants.
MOLECULAR BIOTECHNOLOGY
(2023)
Article
Plant Sciences
Md. Shofiqul Islam, Nick Krom, Taegun Kwon, Guifen Li, Malay C. Saha
Summary: This study identified differentially expressed genes in tall fescue under different temperatures through RNA-seq analysis. The results showed that there were fewer differentially expressed genes in the morning freezing conditions and more in the evening cold conditions. Additionally, the study found that the cold tolerance of tall fescue might be related to some orthologous genes of rice.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Microbiology
Jialin Hu, Grady Miller, Wei Shi
Summary: The study aimed to characterize drought-responsive bacteria and fungi in the roots and rhizosphere of different tall fescue cultivars. The bacterial and fungal communities in roots, rhizosphere and bulk soil were examined for abundance, diversity, and composition. The study revealed significant differences in microbial community composition and structure between non-irrigated and irrigated samples, as well as the impact of tall fescue cultivars on endophytic microbial communities.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Plant Sciences
Ningli Fan, Qian Xu, Zhimin Yang, Lili Zhuang, Jingjin Yu, Bingru Huang
Summary: This study identified 20 expansin genes related to leaf elongation and determined the correlation between expansin gene expression and leaf elongation. Among these genes, 16 showed significant differential expression in the leaf growth zone. Further analysis revealed that the expression level of FaEXPB16 was positively correlated with leaf elongation rate, and FaEXPA7 exhibited significantly higher expression level in leaves of rapid-growing genotypes. FaEXPB3, FaEXPB4-2, and FaEXPB11-2 showed a negative correlation with leaf elongation rate and were highly expressed in leaves of slow-growing genotypes. These expansins could be used as candidate genes in developing rapid or slow-growing perennial grass species.
PHYSIOLOGIA PLANTARUM
(2023)
Article
Plant Sciences
X. Y. Li, Y. Wang, Y. Dai, Y. He, C. X. Li, P. Mao, X. R. Ma
Summary: The study found that under temperature stress, the transcription factor genes of tall fescue showed differential expression patterns, with bZIP and GTF family members up-regulated under both heat and cold conditions, while most WRKY and NAC family members showed decreased expression. TFs play important roles in pathways such as 'Plant hormone signal transduction', 'Plant-pathogen interaction', and 'Circadian rhythm'.