Article
Multidisciplinary Sciences
Ahmed F. Yousef, Muhammad M. Ali, Hafiz M. Rizwan, Shehu Abubakar Tadda, Hazem M. Kalaji, Hao Yang, Mohamed A. A. Ahmed, Jacek Wrobel, Yong Xu, Faxing Chen
Summary: The study found that the tomato photosynthetic apparatus responded differently to light of different spectral qualities, with the best performance observed under a mixture of red and blue light or a mixture of red, green, and blue light. High proportion of blue light led to an increase in non-photochemical quenching. These results can help improve tomato plant production under artificial light conditions.
Article
Plant Sciences
Quang Tri Le, Won Je Lee, Jun Ho Choi, Dinh Thanh Nguyen, Hai An Truong, Sang-A Lee, Suk-Whan Hong, Hojoung Lee
Summary: The loss-of-function mutant of the transcription factor NLP7, which regulates the primary response to nitrate, exhibits salt tolerance and a balanced accumulation of nitrate anions and sodium cations. The mutant shows reduced stress response, lower levels of marker genes, and less accumulation of proline, nitric oxide, and reactive oxygen species under high salinity. However, it also accumulates more sodium ions in the shoots and has higher nitrate levels compared to the wild type. These findings suggest that targeting nitrate metabolism and signaling could improve salt tolerance.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Plant Sciences
Tengfei Liu, Md Abu Kawochar, Shahnewaz Begum, Enshuang Wang, Tingting Zhou, Shenglin Jing, Tiantian Liu, Liu Yu, Bihua Nie, Botao Song
Summary: Cold-induced sweetening is a severe issue in the potato processing industry. This study identifies StTST1 as the sugar transporter with the highest expression in potato tubers during postharvest cold storage. Knockdown of StTST1 reduces sugar accumulation and improves the frying quality of cold-stored tubers. Suppression of StTST1 promotes starch synthesis and inhibits starch degradation, possibly through the down-regulation of beta-amylase StBAM1. These findings provide a new strategy to improve the quality of cold-stored potatoes and reduce acrylamide content in potato chips.
HORTICULTURE RESEARCH
(2023)
Article
Plant Sciences
Mohammad Shah Jahan, Shirong Guo, Jin Sun, Sheng Shu, Yu Wang, Ahmed Abou El-Yazied, Nadiyah M. Alabdallah, Mohamed Hikal, Mostafa H. M. Mohamed, Mohamed F. M. Ibrahim, Md Mahadi Hasan
Summary: Melatonin treatment enhanced photosynthetic efficiency in tomato seedlings under high-temperature stress by increasing endogenous melatonin levels and photosynthetic pigment content, upregulating biosynthesis gene expression, and boosting CO2 assimilation and electron transport efficiency.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2021)
Article
Plant Sciences
Kumar Lama, Li-Juan Chai, Reut Peer, Huiqin Ma, Yelena Yeselson, Arthur A. Schaffer, Moshe A. Flaishman
Summary: Female fig (Ficus carica L.) fruits show a major increase in volume and sugar content during the final week of development, with a temporal separation between water content increase and subsequent sugar content increase. Figs are an extreme example of sugar import and accumulation, with import rates significantly higher than other sugar-accumulating fruit species. By comparing female and male fig fruits, specific genes related to sugar accumulation were highlighted, indicating a global transition in sugar metabolism and transport gene expression during this period.
PHYSIOLOGIA PLANTARUM
(2022)
Article
Plant Sciences
Yui Ozawa, Aiko Tanaka, Takamasa Suzuki, Daisuke Sugiura
Summary: Sink-source imbalance leads to the accumulation of nonstructural carbohydrates (NSCs) and downregulation of photosynthesis. However, it is still unclear whether NSC accumulation or nitrogen deficiency has a more direct effect on the decrease in steady-state maximum photosynthesis and photosynthetic induction, as well as the underlying gene expression profiles. In this study, we investigated the relationship between photosynthetic capacity and NSC accumulation induced by different treatments in soybean and common bean. The findings indicate that NSC accumulation decreases the maximum photosynthetic capacity and delays photosynthetic induction in both species. The downregulation of photosynthesis in soybean can be attributed to the coordinated downregulation of photosynthetic genes involved in various processes, including the Calvin cycle, Rubisco activase, photochemical reactions, and stomatal opening. Additionally, the sink-source imbalance may have affected the balance of sugar-phosphate translocators in chloroplast membranes, leading to starch accumulation. These results provide valuable insights into the mechanisms of photosynthetic downregulation and NSC accumulation, emphasizing the role of NSC accumulation in triggering downregulation rather than nitrogen deficiency.
PHYSIOLOGIA PLANTARUM
(2023)
Article
Environmental Sciences
Linglin Xu, Zhiheng Li, Biyan Zhuang, Fumin Zhou, Zejun Li, Xiaoru Pan, Hao Xi, Wenlu Zhao, Huijun Liu
Summary: The study found that enrofloxacin at high concentration inhibits rice seedling growth, increases nitrate uptake, and enhances nitrogen content. Additionally, enrofloxacin promotes the activity of enzymes related to nitrogen assimilation, leading to the production of more amino acids and proteins, thereby altering the plant's phenotype.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Cell Biology
Xin-Rong Mu, Chen Tong, Xing-Tang Fang, Qin-Xin Bao, Li-Na Xue, Wei-Ying Meng, Chang-Yue Liu, Gary J. Loake, Xiao-Ying Cao, Ji-Hong Jiang, Lai-Sheng Meng
Summary: The study reveals the crucial role of sucrose in de-etiolation process of seedlings. In darkness, sucrose induces ethylene biosynthesis and promotes de-etiolation through a feedback loop. Under light conditions, ethylene inhibits PHYA to further enhance the de-etiolation process.
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
Marine Messant, Umama Hani, Thais Hennebelle, Florence Guerard, Bertrand Gakiere, Andrew Gall, Sebastien Thomine, Anja Krieger-Liszkay
Summary: This study investigates the effects of excess and deficiency of manganese on chloroplast ultrastructure and photosynthetic electron transport in the liverwort Marchantia polymorpha, an emerging model system.
Article
Plant Sciences
Aki Soga-Morimoto, Kouichi Soga, Kazuyuki Wakabayashi, Seiichiro Kamisaka, Takayuki Hoson
Summary: The accumulation of sugars in maize coleoptile and mesocotyl cells was suppressed when etiolated seedlings were exposed to white light irradiation. This suppression was mainly attributed to the decreased activities and transcript levels of sucrose-phosphate synthase (SPS) in the endosperm, leading to reduced sucrose exudation. Additionally, the activities and transcript levels of cell wall-bound invertase in coleoptiles and mesocotyls were also reduced by light irradiation, suggesting inhibition of sucrose unloading processes.
JOURNAL OF PLANT PHYSIOLOGY
(2021)
Article
Plant Sciences
Lei Feng, Wanli Xu, Guangmu Tang, Meiying Gu, Zengchao Geng
Summary: Reducing urea usage by 25% and applying biochar in the surface soil layer significantly increased cotton seedling root absorption area, fresh weight, and nitrogen agronomic efficiency. Changes in key enzymes and cytokinin levels were also observed, indicating a potential benefit of biochar application on nitrogen assimilation efficiency.
Article
Plant Sciences
Xiang Zheng, Bei Zhang, Ni Pan, Xue Cheng, Wei Lu
Summary: This study examined the effects of hydrogen sulfide (H2S) on the growth of wheat (Triticum aestivum L.) under 50 μM cadmium (Cd) stress through hydroponic experiments. The results showed that pretreatment with 50 μM NaHS increased plant height, soluble sugar content, and dry weight of shoots and roots, while reducing the Cd concentration in shoots and roots. NaHS pretreatment also protected the photosynthetic apparatus and maintained osmotic pressure balance in leaf cells. Gene expression analysis revealed that NaHS pretreatment up-regulated the expression of genes related to photosynthetic carbon assimilation and sucrose synthesis. Overall, NaHS pretreatment improved the resistance of wheat seedlings under Cd stress by enhancing photosynthesis and regulating sugar metabolism.
Article
Forestry
Hyungwoo Lim, Sandra Jamtgard, Ram Oren, Linda Gruffman, Sabine Kunz, Torgny Nasholm, Erich Inselsbacher
Summary: The study on Scots pine seedlings showed that supplying organic nitrogen resulted in stable soil nitrogen flux, leading to increased seedlings' growth and nitrogen recovery, as well as reduced risk of nitrate loss. The link between traits and nitrogen uptake in response to different nitrogen sources was highlighted, indicating the importance of stable nitrogen supply for plant nutrition and growth.
Article
Environmental Sciences
Daoliang Yan, Feng Song, Zhen Li, Anket Sharma, Xiaoting Xie, Tingting Wu, Xiaofei Wang, Yi He, Jiabao Chen, Qiaoyu Huang, Lu Zhao, Rongling Wu, Shihui Niu, Huwei Yuan, Bingsong Zheng
Summary: The study showed that spraying ASIT can increase the leaf mass per area and chlorophyll content of grafted hickory seedlings. ASIT treatment positively affected the Rubisco content and photosynthetic rate of seedlings grown under shading conditions, especially on the 45th day of treatment, with significant interaction effects between ASIT application and different shade treatments.
Article
Biochemistry & Molecular Biology
Masahiro Noshi, Risa Hatanaka, Noriaki Tanabe, Yusuke Terai, Takanori Maruta, Shigeru Shigeoka
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
(2016)
Article
Biochemistry & Molecular Biology
Yuji Tanaka, Takahisa Ogawa, Takanori Maruta, Yuta Yoshida, Kazuharu Arakawa, Takahiro Ishikawa
Article
Multidisciplinary Sciences
Takuya Tomiyama, Kaeko Kurihara, Takahisa Ogawa, Takanori Maruta, Takumi Ogawa, Daisaku Ohta, Yoshihiro Sawa, Takahiro Ishikawa
SCIENTIFIC REPORTS
(2017)
Article
Multidisciplinary Sciences
Takuya Tomiyama, Kyo Goto, Yuji Tanaka, Takanori Maruta, Takahisa Ogawa, Yoshihiro Sawa, Takuro Ito, Takahiro Ishikawa
Article
Biochemistry & Molecular Biology
Saki Shiroma, Mio Tanaka, Tomohiro Sasaki, Takahisa Ogawa, Kazuya Yoshimura, Yoshihiro Sawa, Takanori Maruta, Takahiro Ishikawa
Article
Multidisciplinary Sciences
Shun Tamaki, Kohei Nishino, Takahisa Ogawa, Takanori Maruta, Yoshihiro Sawa, Kazuharu Arakawa, Takahiro Ishikawa
Article
Plant Sciences
Yusuke Terai, Hiromi Ueno, Takahisa Ogawa, Yoshihiro Sawa, Atsuko Miyagi, Maki Kawai-Yamada, Takahiro Ishikawa, Takanori Maruta
Article
Plant Sciences
Takashi Kameoka, Takaya Okayasu, Kana Kikuraku, Takahisa Ogawa, Yoshihiro Sawa, Hiroshi Yamamoto, Takahiro Ishikawa, Takanori Maruta
Summary: Under high-light stress, chloroplast APXs and pH-dependent mechanisms interact to maintain plants' stability against oxidative stress. The PGR5-dependent mechanisms compensate for the lack of APXs, and the cyclic electron flow dependent on the NADH dehydrogenase-like complex may play a role in regulating this process.
Article
Plant Sciences
Tsubasa Sodeyama, Hitoshi Nishikawa, Kenji Harai, Daiki Takeshima, Yoshihiro Sawa, Takanori Maruta, Takahiro Ishikawa
Summary: Ascorbate is an important redox compound in plants, primarily synthesized through the d-mannose/l-galactose pathway in streptophytes. Physcomitrium patens was found to possibly possess both the d-mannose/l-galactose pathway and the d-galacturonate pathway. Moss ALase was characterized as a functional enzyme involved in ascorbate metabolism, with PpALase1 playing a significant role in dehydroascorbate degradation rather than ascorbate biosynthesis.
Article
Plant Sciences
Akane Hamada, Yasuhiro Tanaka, Takahiro Ishikawa, Takanori Maruta
Summary: Ascorbate is an essential antioxidant for plant growth and stress tolerance. Recent research shows that chloroplastic DHAR3, in collaboration with glutathione, plays a key role in accumulating ascorbate under high-light stress. This study highlights the importance of balancing stress intensity and recycling capacity for maintaining ascorbate pool size and tolerance to photooxidative stress.
Article
Biochemistry & Molecular Biology
Patrick Willems, Valerie Van Ruyskensvelde, Takanori Maruta, Robin Pottie, Alvaro D. Fernandez-Fernandez, Jarne Pauwels, Matthew A. Hannah, Kris Gevaert, Frank Van Breusegem, Katrien Van der Kelen
Summary: Alternative splicing is an important gene regulatory process in plants, and its inhibition can alleviate cell death and enhance tolerance to oxidative stress.
FREE RADICAL BIOLOGY AND MEDICINE
(2023)
Article
Plant Sciences
Md. Firose Hossain, Amit Kumar Dutta, Takamasa Suzuki, Tetsuya Higashiyama, Chiharu Miyamoto, Sumie Ishiguro, Takanori Maruta, Yuki Muto, Kohji Nishimura, Hideki Ishida, Mostafa Aboulela, Takushi Hachiya, Tsuyoshi Nakagawa
Summary: Targeted expression of bgl23-D is a useful tool for functional analysis of ATCSLDs. The bgl23-D mutant in Arabidopsis affects the bgl23-D gene, leading to abnormal division of guard mother cells and formation of bagel-shaped stomata. By expressing bgl23-D in specific cells and tissues, different phenotypes can be observed, such as cytokinesis defects, pollen shape defects, and increased growth.
Review
Biochemistry & Molecular Biology
Takanori Maruta
Summary: Plants store high concentrations of ascorbate, especially in their leaves, which acts as an excellent antioxidant and photoprotectant. The d-mannose/l-galactose pathway is responsible for ascorbate biosynthesis in plants, which is facilitated by light intensity and requires photosynthesis. The activation of the rate-limiting enzyme GGP by light and photosynthesis plays a critical role in regulating ascorbate pool size. Ascorbate itself also regulates its biosynthesis by repressing GGP translation in a dose-dependent manner.
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Takumi Iwagami, Takahisa Ogawa, Takahiro Ishikawa, Takanori Maruta
Summary: Redox homeostasis is crucial for plant acclimation to nutrient-deficient conditions. This study investigated the effects of nutrient deficiencies on antioxidant systems in Arabidopsis thaliana and found that nitrogen starvation increased ascorbate content. However, there were no phenotypic differences between wild type and ascorbate-deficient mutants under nitrogen starvation. Under high-light stress, the mutants experienced more severe photoinhibition than the wild type, but the same extent of photoinhibition was observed for both wild type and mutants when high-light stress and nitrogen starvation were combined.
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
(2022)
Article
Plant Sciences
Ana Fernandez, Nick Vangheluwe, Ke Xu, Joris Jourquin, Lucas Alves Neubus Claus, Stefania Morales-Herrera, Boris Parizot, Hugues De Gernier, Qiaozhi Yu, Andrzej Drozdzecki, Takanori Maruta, Kurt Hoogewijs, Willem Vannecke, Brenda Peterson, Davy Opdenacker, Annemieke Madder, Zachary L. Nimchuk, Eugenia Russinova, Tom Beeckman