Article
Plant Sciences
Batist Geldhof, Ondrej Novak, Bram van de Poel
Summary: Waterlogging-induced hypoxia in the root zone leads to adaptive responses in the shoot, such as leaf epinasty. This study analyzed the dynamics of multiple hormones in tomato leaves during waterlogging, revealing that leaf age determines hormone homeostasis and modulates changes during waterlogging. Early hormonal signals, including ethylene and abscisic acid, were found to induce epinasty, while the balance of indole-3-acetic acid and cytokinins in the petiole ultimately regulates differential growth.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Biochemistry & Molecular Biology
Wei Wang, Shiyu Song, Mengyan Ge, Chenrui Gu, Kun Chen, Qingzhu Zhang, Qibin Yu, Guifeng Liu, Jing Jiang
Summary: Leaf senescence and abscission are crucial for plants to adapt to seasonal and climate changes. Ethylene and abscisic acid are major phytohormones regulating leaf senescence, but their roles in perennial plants, especially forestry trees, are unclear. This study found that BpEIN3.1 is a transcription repressor and regulates light-dependent premature leaf senescence in birch. Shading and reduced ethylene and abscisic acid biosynthesis suppressed premature leaf senescence in birch ein3.1 mutant line. Abscisic acid positively regulates the expression of BpEIN3.1 and is involved in maintaining homeostasis.
Article
Multidisciplinary Sciences
Ayesha Latif, Saira Azam, Naila Shahid, Muhammad R. Javed, Zeshan Haider, Aneela Yasmeen, Sahar Sadaqat, Mohsin Shad, Tayyab Husnain, Abdul Q. Rao
Summary: The overexpression of AGL42 gene in transgenic cotton plants delays premature leaf senescence, increases photosynthetic rate and chlorophyll content, and suppresses the expression of senescence-related genes, leading to higher cotton yield.
SCIENTIFIC REPORTS
(2022)
Article
Plant Sciences
Cade N. Kane, Scott A. M. McAdam
Summary: Increases in leaf ABA levels do not drive natural leaf senescence in autumn, but can enhance senescence rates. The importance of ABA as a driver of leaf senescence in winter deciduous trees is investigated, and it is found that ABA may augment leaf senescence but is not essential for this annual process.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Plant Sciences
Tianrui Yang, Minna Zhang, Qi Yang, Kun Liu, Jiaming Cui, Jia Chen, Yufan Ren, Yunjie Shao, Ruigang Wang, Guojing Li
Summary: By studying the role of CiS40-11 in leaves, it was found that it delayed leaf senescence by inhibiting AtMYB2 expression and promoting cytokinin biosynthesis.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)
Article
Plant Sciences
Shuilin Yuan, Yuan Wang, Die Hu, Weitong Zhu, Dong Xiao, Tongkun Liu, Xilin Hou, Ying Li
Summary: This study identified a new regulatory gene, BcNAC056, in pak choi that promotes leaf senescence by activating SAG12. Additionally, the interaction between BcNAC056 and BcWRKY1 was found to contribute to the activation of BcSAG12, thereby further enhancing leaf senescence.
PLANT AND CELL PHYSIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Tongtong Jing, Kun Liu, Yanan Wang, Xizhen Ai, Huangai Bi
Summary: Melatonin (MT) has been found to have antioxidant roles in delaying leaf senescence in cucumber plants. It reduces oxidative damage by decreasing the levels of malonaldehyde (MDA) and reactive oxygen species (ROS), while increasing the activities and gene expression of antioxidant enzymes. MT also suppresses the expression of senescence-related and cell-death-related genes. Additionally, MT regulates hormone synthesis and signaling pathways, inhibiting abscisic acid (ABA) biosynthesis and signaling while promoting auxin (IAA) biosynthesis and signaling in cucumber plants.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Daniela Kocourkova, Kristyna Kroumanova, Tereza Podmanicka, Michal Danek, Jan Martinec
Summary: The study found that PLD alpha 1 plays a crucial role in Arabidopsis plants' response to high-magnesium stress, delaying leaf senescence. Knockout mutants of PLD alpha 1 exhibited premature leaf aging and disrupted homeostasis of essential nutrients such as magnesium, potassium, and phosphate under high-Mg2+ conditions. Additionally, high Mg2+ levels led to increased starch and proline content in Arabidopsis plants, with significantly different levels observed in the PLD alpha 1 mutant compared to wild type plants.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Angel M. Zamarreno, Giancarlo Valduga, Jose M. Garcia-Mina
Summary: High doses of vinasse have positive effects on sugarcane yield. Besides mineral nutrients and soil properties, vinasse may contain plant hormones that benefit plant growth. The presence of IAA and ABA in vinasse suggests their potential role in enhancing sugarcane growth.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Biotechnology & Applied Microbiology
Jorge Poveda, Fernando Gonzalez-Andres
Summary: Microbial plant biostimulants (MPBs) enhance crop productivity and quality by activating plant physiological and molecular processes through phytohormone production. Bacillus species, a bacterial genus used as biopesticides, protect plants from pests and pathogens while promoting plant growth through various mechanisms, including increasing tolerance to stress conditions and improving plant nutrition. The production of phytohormones by Bacillus species plays a key role in increasing plant growth, development, and stress response.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Chao Wu, Baoyu Liu, Xiujiao Zhang, Manlian Wang, Huiling Liang
Summary: Illicium difengpi, an endemic and medicinal plant found in karst mountain areas, has evolved strategies to adapt to arid environments. This study investigates the effects of drought and rehydration treatments on the leaf succulence, phytohormones, and phytohormonal signal transduction in I. difengpi plants. It is suggested that ABA, JA, and ZR play important roles in the response to severe drought in I. difengpi. Transcriptomic profiling also reveals differentially expressed genes involved in phytohormone biosynthesis and signal transduction in response to drought stress.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Biochemistry & Molecular Biology
Agnieszka Sirko, Anna Wawrzynska, Jerzy Brzywczy, Marzena Sienko
Summary: Plants require rapid and appropriate genetic and metabolic acclimation in a changing environment for survival, which is maintained through the coordinated action of plant hormones and cellular degradation mechanisms affecting proteostasis. The plant hormone abscisic acid (ABA) rapidly accumulates in response to environmental stress and plays a pivotal role in various stimuli reactions. Autophagy has been shown to significantly control ABA signaling, with ongoing research providing new insights on different components of the ABA pathway and the involvement of selective autophagy in ABA pathway control.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Plant Sciences
Jaclyn A. Adaskaveg, Christian J. Silva, Peng Huang, Barbara Blanco-Ulate
Summary: Mutations related to tomato fruit ripening were found to cause developmental defects before ripening, with some ripening changes still occurring; differences in plant hormone metabolism and signaling were also observed among different mutants.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Hou-Ling Wang, Yi Zhang, Ting Wang, Qi Yang, Yanli Yang, Ze Li, Bosheng Li, Xing Wen, Wenyang Li, Weilun Yin, Xinli Xia, Hongwei Guo, Zhonghai Li
Summary: Through RNA sequencing in poplar, researchers identified key transcription factors involved in autumn leaf senescence and discovered that a truncated protein can act as a dominant-negative regulator by interacting with core senescence-associated transcription factors. They proposed that age-dependent alternative splicing variants play a role in fine-tuning the molecular mechanisms that regulate leaf senescence in trees.
Article
Agronomy
Van Hien La, Trinh Hoang Anh Nguyen, Xuan Binh Ngo, Van Dien Tran, Huu Trung Khuat, Tri Thuc Bui, Thi Thu Ha Tran, Young Soo Chung, Tien Dung Nguyen
Summary: The NAC transcription factor ORESARA1 (ORE1) plays a role in modulating senescence in plants. In soybeans, At-ore1 has been found to induce early leaf senescence by enhancing ABA synthesis and activating the H2O2-GmARF2-GmNAC081 signaling pathway. At the same time, At-ore1 functions in IAA to delay leaf senescence and suppress the expression of ABA, ROS, and senescence-associated genes. These findings provide insights into the complex regulatory mechanisms underlying leaf senescence in soybeans.