Article
Plant Sciences
Eva van Zelm, Silvia Bugallo-Alfageme, Pariya Behrouzi, A. Jessica Meyer, Christa Testerink, Charlotte M. M. Gommers
Summary: The root system architecture of plants changes during salt stress exposure. Different accessions of Arabidopsis thaliana adopt different strategies in remodeling their root architecture during salt stress. Salt induces a multiphase growth response in roots, and both the growth rate of main roots during homoeostasis and lateral root appearance are the strongest determinants of overall root architecture. Furthermore, a trade-off between investing in main or lateral root length during salt stress is revealed. By studying natural variation in high-resolution temporal root growth using mathematical modeling, new insights in the interactions between dynamic root growth traits are discovered.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Plant Sciences
Hamada AbdElgawad, Gaurav Zinta, Johann Hornbacher, Jutta Papenbrock, Marios N. Markakis, Han Asard, Gerrit T. S. Beemster
Summary: The study found that increased CO2 concentration has a significant effect on drought resistance, especially through the promotion of aliphatic glucosinolate (GL) synthesis. By regulating the expression of transcription factors ABI5 and WRKY63, the synergistic effect of MYB28/29, and increasing the accumulation of GL precursors, CO2 can promote GL synthesis. In addition, overexpression of MYB28, 29, and 76 genes can improve drought tolerance by maintaining plant water and stomatal closure, while the loss of cyp79f genes weakens the drought resistance and mitigating effect of CO2.
PLANT CELL AND ENVIRONMENT
(2023)
Article
Plant Sciences
Nicholas de Jager, Varsa Shukla, Anna Koprivova, Martin Lycka, Lorina Bilalli, Yanrong You, Juergen Zeier, Stanislav Kopriva, Daniela Ristova
Summary: Sulfur is an essential mineral nutrient for plant growth and development. Its content in leaves is tightly connected with sulfate uptake, concentration of sulfate and phosphate anions, and synthesis of glucosinolates and glutathione. Sulfur homeostasis in Arabidopsis thaliana is regulated by biotic and abiotic stressors, leading to large variation in sulfur content among different accessions.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Plant Sciences
Gustavo Turqueto Duarte, Prashant K. Pandey, Neha Vaid, Saleh Alseekh, Alisdair R. Fernie, Zoran Nikoloski, Roosa A. E. Laitinen
Summary: This study dissected the genetic architecture of plasticity in response to different nitrogen levels in Arabidopsis thaliana accessions. It was found that plasticity in levels of primary metabolites were related to the plasticities of the studied traits, and the gene At1g19880 was identified to confer plasticity of rosette diameter in response to nitrogen. Additionally, different genetic programs were shown to regulate growth and flowering-related traits in response to environmental cues.
PLANT CELL AND ENVIRONMENT
(2021)
Article
Plant Sciences
Peng Sun, Jean-Charles Isner, Aude Coupel-Ledru, Qi Zhang, Ashley J. Pridgeon, Yaqian He, Paloma K. Menguer, Anthony J. Miller, Dale Sanders, Steve P. Mcgrath, Fonthip Noothong, Yun-Kuan Liang, Alistair M. Hetherington
Summary: Increased CO2 concentration reduces the zinc and iron content in Arabidopsis seeds. This reduction can be mitigated by reducing the CO2-induced decrease in transpiration. Mutants in the ACA7 gene, which is expressed in guard cells, exhibit higher transpiration and higher seed Fe and Zn content under elevated CO2 conditions.
Article
Plant Sciences
Fei-Hong Yan, Li-Ping Zhang, Fang Cheng, Dong-Mei Yu, Jin-Yong Hu
Summary: In this study, we investigated the Arabidopsis natural variation in flowering time in response to nitrate fluctuation, revealing accession- and photoperiod-specific flowering responses. The variation in flowering time was found to be correlated with the expression of floral integrators and key hub genes in relevant pathways. Our results shed light on the molecular genetic mechanisms regulating flowering time variation in response to nitrate availability.
Article
Plant Sciences
A. Skiljaica, M. Jagic, T. Vuk, D. Leljak Levanic, N. Bauer, L. Markulin
Summary: Increases in environmental temperature have significant effects on plant growth and development, and this study identified reliable reference genes for Arabidopsis thaliana experiments involving elevated temperature treatments. The identification of these reference genes contributes to a better understanding of the impact of climate change on plants, particularly in agricultural species.
Article
Plant Sciences
Chaoqun Xu, Ling-Yu Song, Ying Zhou, Dong-Na Ma, Qian-Su Ding, Ze-Jun Guo, Jing Li, Shi-Wei Song, Lu-Dan Zhang, Hai-Lei Zheng
Summary: This study provides important insights into the genetic architecture of ionome variations in A. thaliana leaves in a cell-type-specific manner. By using single-cell RNA-sequencing data, the study estimated cell-type abundances and identified cell-type-interaction eQTLs (cis-eQTLs(ci)). Additionally, a Genome-wide association study (GWAS) was conducted to identify the genetic basis of variations in A. thaliana leaf ionome.
PLANT CELL REPORTS
(2023)
Article
Plant Sciences
Konrad Kraemer, Judith Brock, Arnd G. Heyer
Summary: It has been repeatedly shown that exposure to elevated atmospheric CO2 leads to an increased C/N ratio in plant biomass, possibly due to increased carbon or reduced nitrogen assimilation. Photorespiration stimulates the GS/GOGAT cycle, but mathematical flux simulations suggest that nitrate assimilation is not reduced at elevated CO2. The reduced growth in the hpr1-1 mutant is not due to nitrogen starvation, but rather to a loss of cellular energy and metabolic imbalance.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Eigo Ando, Hannes Kollist, Kohei Fukatsu, Toshinori Kinoshita, Ichiro Terashima
Summary: Light and CO2 concentration play important roles in stomatal opening and closure. Changes in light and CO2 concentration can affect the phosphorylation level of guard cell H+-ATPase, which regulates the degree of stomatal aperture.
Article
Plant Sciences
Matheus Fernandes Gyorfy, Emma R. Miller, Justin L. Conover, Corrinne E. Grover, Jonathan F. Wendel, Daniel B. Sloan, Joel Sharbrough
Summary: The study reveals that in plant whole genome duplication events, the imbalance in copy numbers between nuclear and organellar genomes can trigger an immediate cellular response, with polyploids maintaining an elevated organellar genome copy number trend despite changes in nuclear genome copy number. Maintenance of cytonuclear stoichiometry is identified as a crucial component in the establishment of polyploid lineages.
Article
Microbiology
Fernanda Plucani do Amaral, Juexin Wang, Jacob Williams, Thalita R. Tuleski, Trupti Joshi, Marco A. R. Ferreira, Gary Stacey
Summary: Plant growth-promoting bacteria (PGPB) can enhance plant health through nutrient uptake, nitrogen fixation, pathogen protection, stress tolerance, and improved productivity. This study used a genome-wide association study (GWAS) to identify genetic loci highly correlated with traits responsive to PGPB in Arabidopsis thaliana. The study found 11 loci associated with responsiveness of root fresh weight to bacterial inoculation. These findings provide a promising starting point for sustainable breeding strategies and crop practices involving beneficial microbes and modifications of the root microbiome.
Article
Plant Sciences
Elisa Schulz, Takayuki Tohge, J. Barbro Winkler, Andreas Albert, Anton R. Schaeffner, Alisdair R. Fernie, Ellen Zuther, Dirk K. Hincha
Summary: Plants face stressful environmental conditions and may be simultaneously exposed to different stress factors like UV radiation and cold, leading to unique and unpredictable interactions on stress-related genes and flavonoid biosynthesis pathways. The presence of UV radiation can abolish correlations between gene expression levels of flavonoid biosynthesis and flavonol levels, while cold-regulated genes may still play a role in plant responses under combined stress.
PLANT AND CELL PHYSIOLOGY
(2021)
Article
Plant Sciences
Juan Camilo Ochoa, Soham Mukhopadhyay, Tomasz Bieluszewski, Malgorzata Jedryczka, Robert Malinowski, William Truman
Summary: The RPB1 gene plays a critical role in the defense response of Arabidopsis against Plasmodiophora brassicae infection, and its deletion renders resistant accessions susceptible to the pathogen.
Article
Multidisciplinary Sciences
Hongcheng Zhao, Nan Sun, Lin Huang, Ruyi Qian, Xianyong Lin, Chengliang Sun, Yongguan Zhu
Summary: The molecular mechanism of root development mediated by the beneficial bacterium Azospirillum brasilense is not fully understood. A. brasilense induces extensive transcriptional changes but inhibits primary root elongation in Arabidopsis. Through analysis of root cell type-specific markers, it was found that A. brasilense does not alter the overall organization or cell division of the primary root meristem. The inhibition of root elongation is primarily due to the reduction of cell elongation, which is caused by bacterially activated peroxidase leading to cell wall cross-linking. The activation of peroxidase, in combination with the downregulation of cell wall loosening enzymes, results in an increase in cell wall thickness.
Article
Plant Sciences
Satoshi Machino, Soichiro Nagano, Kouki Hikosaka
Summary: The temperature dependence of light-saturated photosynthesis varies among different ecotypes, with those from high-altitude and high-latitude habitats showing adaptive photosynthesis at low temperatures. However, the mechanisms for adapting to high-altitude environments may differ from those adapting to high-latitude environments.
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
(2021)
Editorial Material
Plant Sciences
Kouki Hikosaka
JOURNAL OF PLANT RESEARCH
(2021)
Review
Plant Sciences
Johannes A. Postma, Vera L. Hecht, Kouki Hikosaka, Eric A. Nord, Thijs L. Pons, Hendrik Poorter
Summary: Increasing plant population density leads to an increase in standing crop per area but a decrease in individual plant size, mainly through reduced tillering and branching. Phenotypic plasticity responses to high densities correlate strongly with those to low light, suggesting that shading affects plants more than nutrient depletion at high density.
PLANT CELL AND ENVIRONMENT
(2021)
Article
Plant Sciences
Kouki Hikosaka, Hiroko Kurokawa, Takahisa Arai, Sakino Takayanagi, Hiroshi O. Tanaka, Soichiro Nagano, Tohru Nakashizuka
Summary: This study examined intraspecific variations in leaf traits, productivity, and resource use efficiency along altitudinal gradients in subalpine forests in Japan. The results showed that different dominant tree species at lower and higher altitudes exhibited varied responses in leaf traits, productivity, and resource use efficiency, suggesting that the ecological significance of altitudinal variations in leaf traits depends on species and environment.
JOURNAL OF ECOLOGY
(2021)
Article
Plant Sciences
Daichi Makishima, Rui Sutou, Akihito Goto, Yutaka Kawai, Naohiro Ishii, Hayami Taniguchi, Kei Uchida, Masaya Shimazaki, Tohru Nakashizuka, Yoshihisa Suyama, Kouki Hikosaka, Takehiro Sasaki
Summary: Habitat loss and fragmentation can lead to delayed extinction, known as extinction debt. Research has found that this potential extinction debt may also exist in natural ecosystems with minimal direct human disturbance.
Article
Plant Sciences
Yusuke Mizokami, Riichi Oguchi, Daisuke Sugiura, Wataru Yamori, Ko Noguchi, Ichiro Terashima
Article
Plant Sciences
Takehiro Sasaki, Naohiro I. Ishii, Daichi Makishima, Rui Sutou, Akihito Goto, Yutaka Kawai, Hayami Taniguchi, Kunihiro Okano, Ayumi Matsuo, Alfred Lochner, Simone Cesarz, Yoshihisa Suyama, Kouki Hikosaka, Nico Eisenhauer
Summary: This study provides observational evidence that plant and microbial community composition, rather than diversity, are crucial for sustaining multifunctionality in subalpine moorlands. Furthermore, plant and bacterial beta diversity enhance the dissimilarity of moorland multifunctionality.
JOURNAL OF ECOLOGY
(2022)
Article
Plant Sciences
Daichi Makishima, Naohiro Ishii, Rui Sutoh, Akihito Goto, Yutaka Kawai, Hayami Taniguchi, Kei Uchida, Masaya Shimazaki, Tohru Nakashizuka, Yoshihisa Suyama, Kouki Hikosaka, Takehiro Sasaki
Summary: This study investigated the response of plant species richness to simulated area loss in subalpine moorland ecosystems. The results showed that the patterns of species loss caused by realistic area loss differed from those caused by random area loss, with an accelerating decline in species richness as the area loss increased. At the species level, the loss order was related to the occurrence rate at a given site.
JOURNAL OF VEGETATION SCIENCE
(2022)
Article
Plant Sciences
Naofumi Yoshida, Shin-Ichi Morinaga, Takeshi Wakamiya, Yuu Ishii, Shosei Kubota, Kouki Hikosaka
Summary: Adaptive divergence can occur between populations that are not sufficiently isolated, but have significant environmental differences in their habitats. Individuals in the intermediate zone between these divergent populations are expected to have a mixed genetic structure due to gene flow. Selective pressure on these genetically admixed individuals may limit gene flow and maintain adaptive divergence.
JOURNAL OF PLANT RESEARCH
(2023)
Article
Environmental Sciences
T. Kiyono, H. M. Noda, T. Kumagai, H. Oshio, Y. Yoshida, T. Matsunaga, K. Hikosaka
Summary: In this study, researchers used solar-induced chlorophyll fluorescence (SIF) data from the Greenhouse gases Observing Satellite (GOSAT) to estimate the wilting point of a semiarid grassland on the Mongolian Plateau. They modified an existing inversion algorithm and a widely used model to accurately evaluate the effects of drought on plant physiology and optical properties. The study found that GOSAT SIF showed a clear sigmoidal pattern in relation to drought, and the modified model reproduced observed SIF values well.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Review
Geosciences, Multidisciplinary
Ryoichi Imasu, Tsuneo Matsunaga, Masakatsu Nakajima, Yukio Yoshida, Kei Shiomi, Isamu Morino, Naoko Saitoh, Yosuke Niwa, Yu Someya, Yu Oishi, Makiko Hashimoto, Hibiki Noda, Kouki Hikosaka, Osamu Uchino, Shamil Maksyutov, Hiroshi Takagi, Haruma Ishida, Takashi Y. Nakajima, Teruyuki Nakajima, Chong Shi
Summary: GOSAT-2, the successor of GOSAT, has improved sensors and can provide higher quality and quantity of greenhouse gas observations. The introduction of an intelligent pointing mechanism improves the accuracy of CO2 emissions estimation by avoiding cloud cover.
PROGRESS IN EARTH AND PLANETARY SCIENCE
(2023)
Article
Plant Sciences
Zhili Liu, Kouki Hikosaka, Fengri Li, Liangjun Zhu, Guangze Jin
Summary: The study found that plant size, environmental factors, and functional traits collectively shaped tree growth, with their relative influence varying with tree size. This suggests that the resources limiting tree growth may change from light to soil nutrients as tree size increases.
JOURNAL OF PLANT ECOLOGY
(2021)