Article
Plant Sciences
Pavel Hladik, Ivan Petrik, Asta Zukauskaite, Ondrej Novak, Ales Pencik
Summary: Auxins are phytohormones that regulate plant growth and development, primarily through the action of indole-3-acetic acid (IAA). The levels of free IAA in plants are controlled by oxidative catabolism and conjugation reactions. In this study, two new auxin metabolites, oxIAA-leucine and oxIAA-phenylalanine, were identified and characterized in plants. A new method using liquid chromatography-tandem mass spectrometry was developed to quantify a wide range of IAA metabolites. The distribution of various auxin metabolites varied among plant species and plant sections, indicating diverse inactivation pathways of auxin among angiosperm plants. These findings contribute to a better understanding of IAA homeostasis.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Bi-Xian Zhang, Pei-Shan Li, Ying-Ying Wang, Jia-Jun Wang, Xiu-Lin Liu, Xue-Yang Wang, Xiao-Mei Hu
Summary: The study found that Enterobacter sp. strains have high IAA production capability and synthesize IAA through the indole-3-pyruvic acid pathway. The IAA product of these microbes promotes the growth of maize.
Review
Microbiology
Jintian Tang, Yukang Li, Leilei Zhang, Jintao Mu, Yangyang Jiang, Huilan Fu, Yafen Zhang, Haifeng Cui, Xiaoping Yu, Zihong Ye
Summary: Indole-3-acetic acid (IAA) is an important plant hormone that regulates plant growth and development. It also plays a significant role in microorganisms, affecting their growth, development, and interaction with plants. Understanding the biosynthesis and functions of IAA in microorganisms can help improve its production and utilization in agriculture.
Article
Plant Sciences
Marta-Marina Perez-Alonso, Paloma Ortiz-Garcia, Jose Moya-Cuevas, Thomas Lehmann, Beatriz Sanchez-Parra, Robert G. Bjork, Sazzad Karim, Mohammad R. Amirjani, Henrik Aronsson, Mark D. Wilkinson, Stephan Pollmann
Summary: AMI1 plays a crucial role in plant growth by helping plants adapt to abiotic stresses through balancing auxin. Functional impairment of AMI1 leads to increased susceptibility to stress, with mutant plants showing slightly repressed growth but enhanced ABA accumulation, suggesting a role for AMI1 in the crosstalk between auxin and ABA.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Biochemistry & Molecular Biology
Umi Miyata, Kenta Arakawa, Mami Takei, Tadao Asami, Kazuya Asanbou, Hiroaki Toshima, Yoshihito Suzuki
Summary: PonAAS2, an aromatic aldehyde synthase, plays a key role in the biosynthesis of IAA in galling sawfly, with high expression levels in early and mid-stage larvae. Inhibiting PonAAS2 can significantly reduce IAA production in sawfly enzymes, highlighting the enzyme's important role in IAA biosynthesis in sawfly.
INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Yaru Wang, Achen Zhao, Rafael J. L. Morcillo, Gang Yu, Hao Xue, Jose S. Rufian, Yuying Sang, Alberto P. Macho
Summary: This study reveals that the plant metabolic pathway mediated by pyruvate decarboxylases (PDCs) contributes to plant tolerance to bacterial wilt disease caused by Ralstonia solanacearum. Plants respond to infection by increasing PDC activity, and deficient PDC activity makes plants more susceptible to bacterial wilt. Treatment with pyruvic acid or acetic acid enhances plant tolerance to the disease, while an effector protein secreted by the pathogen inhibits PDCs' oligomerization and enzymatic activity, promoting disease and completion of the pathogenic life cycle.
Article
Plant Sciences
Maciej Ostrowski, Anna Ciarkowska
Summary: This study demonstrates that GH3 acyl acid amidosynthetase is able to catalyze the formation of high molecular weight IAA conjugates with proteins. The enzyme exhibits a preference for the formation of IAA-Asp, but specific substrates like L-Asp can down-regulate the conjugation process. Additionally, competition with specific substrates like L-Trp can inhibit the enzyme's activity.
JOURNAL OF PLANT PHYSIOLOGY
(2021)
Review
Plant Sciences
Matthijs Oosterbeek, Jose L. Lozano-Torres, Jaap Bakker, Aska Goverse
Summary: The passage discusses the infection mechanisms of sedentary endoparasites like cyst and root-knot nematodes on important food crops, highlighting the importance of plant hormones such as indole-3-acetic acid (IAA) in the formation of feeding structures. It also points out the complexity of the molecular and biochemical mechanisms underlying these interactions and suggests potential roles for other auxins in plant-parasitic nematode infections that require further investigation.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Xiang Huang, Jan Maisch, Ken-Ichiro Hayashi, Peter Nick
Summary: The complexity of auxin signaling is due to multiple auxin receptors, which trigger differential signaling. Fluorescent auxin analogs were used to study the subcellular localization of auxin-binding sites. The results show that different analogs bind to different subcellular compartments, indicating the differential signaling in response to these artificial auxins.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Jimmy Sampedro-Guerrero, Vicente Vives-Peris, Aurelio Gomez-Cadenas, Carolina Clausell-Terol
Summary: The role of salicylic acid (SA) in plant development was studied using Arabidopsis thaliana. Free SA treatment affected root and rosette growth, while encapsulated SA reduced the deleterious effects. Encapsulation allows for controlled release of SA, mitigating its damage on plant growth.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Qian-Qian Li, Zhan Zhang, Ya-Ling Wang, Li-Yuan Zhong, Zhen-Fei Chao, Yi-Qun Gao, Mei-Ling Han, Lin Xu, Dai-Yin Chao
Summary: ﹥Adventitious roots (ARs) are important for plants and show high phenotypic plasticity in response to different environmental stimuli. Dark-light transition can induce AR formation from the hypocotyl of etiolated Arabidopsis thaliana, but the central regulatory machinery for this process remains unclear. Photoreceptors have been found to suppress HAR biogenesis by regulating the molecular module essential for lateral roots.
Article
Plant Sciences
Haimiao Zhang, Zixuan Rong, Yang Li, Ziyi Yin, Chongchong Lu, Haipeng Zhao, Lingguang Kong, Lun Meng, Xinhua Ding
Summary: This study reveals the existence of a nitrilase-dependent IAA biosynthesis pathway in Xanthomonas oryzae pv. oryzicola (Xoc). Genes related to IAA synthesis promote Xoc colonization by inhibiting rice immune defense response and increasing IAA content in Xoc, which affects rice growth.
MOLECULAR PLANT PATHOLOGY
(2023)
Article
Plant Sciences
Chaohui Ding, Xianhui Lin, Ying Zuo, Zhilin Yu, Scott R. Baerson, Zhiqiang Pan, Rensen Zeng, Yuanyuan Song
Summary: Transcription factor OsbZIP49 plays a significant role in determining plant architecture in rice by influencing local auxin homeostasis and gravitropic responses.
Article
Plant Sciences
Eduardo Mateo-Bonmati, Ruben Casanova-Saez, Jan Simura, Karin Ljung
Summary: The levels of the important plant growth regulator IAA are tightly controlled within plant tissues through metabolic inactivation, modulation of concentration gradients, and glycosylation processes; UGT84B1 and UGT74D1 have been identified as key enzymes in the glycosylation of IAA and oxIAA, which play crucial roles in regulating plant growth and development. Additionally, a novel UGT subfamily has been discovered to redundantly mediate the glycosylation of oxIAA and modulate skotomorphogenic growth.
Article
Biochemistry & Molecular Biology
Xiang Zhang, Fei Duan, Fan Zhang, Xuliang Deng, Weiping Gao
Summary: In this study, a thermosensitive polymer conjugate of poly(diethylene glycol) methyl ether methacrylate (PDEGMA) was grown in situ from horseradish peroxidase (HRP), which successfully improved the antitumor efficacy of enzyme-activated prodrug. The conjugate not only increased the stability and cellular uptake of HRP, but also prolonged the tumor retention time of HRP, resulting in more efficient inhibition of melanoma growth compared to HRP.
Review
Plant Sciences
Patricia Juliana Lopes-Oliveira, Halley Caixeta Oliveira, Zsuzsanna Kolbert, Luciano Freschi
Summary: This review examines the role of nitric oxide (NO) in controlling plant growth, development, metabolism, and stress responses through its interactions with light and hormonal signaling cascades. It also discusses the versatile functions of NO in regulating photosynthesis and stomatal movements, highlighting the importance of nitrate reductase (NR) regulation for adjusting NO production in plants exposed to natural light conditions.
JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Chemistry, Applied
Fernanda Papa Spada, Dimitrios P. Balagiannis, Eduardo Purgatto, Severino Matias do Alencar, Solange Guidolin Canniatti-Brazaca, Jane K. Parker
Summary: The study aimed to characterize the aroma compounds in flours prepared from roasted jackfruit seeds and compare them with Brazilian cocoa powder. Jackfruit seeds produced additional pyrazines compared to cocoa products, some of which were responsible for the characteristic earthy "roasted jackfruit seed" aroma. The fermented sample had the most similar aroma profile to cocoa powder.
Article
Plant Sciences
Juliana L. Costa, Daniele Paschoal, Eder M. da Silva, Jamille S. Silva, Rafael M. do Carmo, Esther Carrera, Isabel Lopez-Diaz, Monica L. Rossi, Luciano Freschi, Piotr Mieczkowski, Lazaro E. P. Peres, Paulo J. P. L. Teixeira, Antonio Figueira
Summary: The study found that Moniliophthora perniciosa may induce abnormal stem development in the host by regulating host cytokinin metabolism, and iP produced by the pathogen may facilitate cytokinin synthesis in the host, exacerbating symptoms such as stem swelling.
Article
Agricultural Engineering
Fabio Trigo Raya, Marina Pupke Marone, Lucas Miguel Carvalho, Sarita Candida Rabelo, Maiki Soares de Paula, Maria Fernanda Zaneli Campanari, Luciano Freschi, Juliana Lischka Sampaio Mayer, Odilon Reny Ribeiro Ferreira Silva, Piotr Mieczkowski, Marcelo Falsarella Carazzolle, Goncalo Amarante Guimaraes Pereira
Summary: Agaves, traditionally used in dryland areas for various purposes, still hold potential for biofuel production despite reduced research investment due to synthetic fiber development. In Brazil, elite Agave cultivars remain healthy after years of abandonment, activating stress response genes and expressing high levels of raffinose. Differences in lignin composition and biosynthetic pathway contribute to variations in recalcitrance among cultivars, offering new insights for molecular breeders aiming to utilize Agaves as biorenewables feedstocks.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Correction
Medicine, Research & Experimental
Aline Marcadenti, Bernardete Weber, Angela Cristine Bersch-Ferreira, Rachel Helena Vieira Machado, Camila Ragne Torreglosa, Enilda Maria de Sousa Lara, Lucas Ribeiro da Silva, Renato Hideo Nakagawa Santos, Debora Harumi Kodama Miyada, Erica Regina Ribeiro Sady, Rosana Perim Costa, Leopoldo Piegas, Erlon Oliveira de Abreu-Silva, Alexandre Schaan de Quadros, Camila Weschenfelder, Julia Lorenzon dos Santos, Gabriela Correa Souza, Suena Medeiros Parahiba, Ana Paula Trussardi Fayh, Danielle Soares Bezerra, Ana Paula Perillo Ferreira Carvalho, Malaine Morais Alves Machado, Sandra Mary Lima Vasconcelos, Jessika Araujo, Jose Albuquerque de Figueiredo Neto, Luciana Pereira Pinto Dias, Francisca Eugenia Zaina Nagano, Cassia Cristina Paes de Almeida, Annie Seixas Bello Moreira, Debora Pinto Gapanowicz, Eduardo Purgatto, Marcelo Macedo Rogero, Geni Rodrigues Sampaio, Elizabeth Aparecida Ferraz da Silva Torres, Graziela Biude Silva Duarte, Alexandre Biasi Cavalcanti
Article
Plant Sciences
Eric de Castro Tobaruela, Bruna Lima Gomes, Vanessa Caroline de Barros Bonato, Elis Silva de Lima, Luciano Freschi, Eduardo Purgatto
Summary: The study revealed that ethylene and auxin play significant roles in the aroma formation of tomato fruits during ripening, influencing the volatile organic compound metabolism and resulting in distinct aroma profiles in different cultivars.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Plant Sciences
Silvia Leticia Rivero Meza, Eric de Castro Tobaruela, Grazieli Benedetti Pascoal, Hilton Cesar Rodrigues Magalhaes, Isabel Louro Massaretto, Eduardo Purgatto
Summary: The study shows that exogenous methyl jasmonate treatment can enhance the nutritional value and fruit quality of tomatoes. Methyl jasmonate stimulates the production of amino acids and fatty acids, while exogenous ethylene mainly affects sugar metabolism. Additionally, methyl jasmonate significantly affects the accumulation of secondary metabolites, increasing the levels of α-tocopherol and β-sitosterol in the fruits.
Article
Plant Sciences
Daniel Neris, Lucia Mattiello, Gustavo Zuniga, Eduardo Purgatto, Marcelo Menossi
Summary: This study investigates the effects of low endogenous production of ethylene in sugarcane using RNA interference to silence three genes involved in the ethylene biosynthesis pathway. The findings reveal that reduced ethylene levels result in increased plant growth, accelerated lateral gem germination, and activation of non-enzymatic antioxidant mechanisms. Furthermore, changes in the expression of genes related to growth induction and repression were observed. This study provides valuable insights into the molecular mechanisms behind ethylene responses in sugarcane.
PLANT CELL REPORTS
(2022)
Article
Biochemistry & Molecular Biology
Vanessa Fuentes Suguiyama, Jae Diana Paredes Rodriguez, Tatiane Cristina Nicomedio dos Santos, Bruno Silvestre Lira, Luis Alejandro de Haro, Joao Paulo Naldi Silva, Eduardo Leite Borba, Eduardo Purgatto, Emerson Alves da Silva, Nicolas Bellora, Fernando Carrari, Danilo da Cruz Centeno, Luisa Fernanda Bermudez, Magdalena Rossi, Nathalia de Setta
Summary: Drought is a major environmental stress that negatively affects plant growth and reproductive yield. The response to water deficit is determined by the duration and intensity of the stress, as well as the genetic makeup of the plant. The metabolic adjustments in response to water deficit involve complex gene expression regulation, including DNA-binding proteins and epigenetic modifications. In this study, Setaria italica plants exposed to different levels of water deficit were analyzed, and the results showed a progressive reduction in yield with increasing water deficit intensity. The signaling pathway modulation and metabolic adjustments were found to be associated with this response. Furthermore, certain loci related to drought perception, signaling, and regulation were consistently associated with drought responses. The analysis of the transcriptome and sRNAome also revealed potential gene regulation mechanisms involving transposable elements and sRNAs, as well as an intriguing correlation between transcript levels and sRNA accumulation. These findings provide insights into the processes that enable S. italica to overcome drought and survive under water restrictive conditions.
PLANT MOLECULAR BIOLOGY
(2022)
Article
Horticulture
Camilla Zanotti Gallon, Tania Shiga, Eduardo Purgatto, Angelo Pedro Jacomino
Summary: This study identified the characteristics of rapid softening disorder in papaya and provided evidence to differentiate susceptible fruit from non-susceptible fruit.
SCIENTIA HORTICULTURAE
(2022)
Article
Food Science & Technology
Naissa Previde Bernardo, Aline de Oliveira, Renata Vieira da Mota, Francisco Mickael de Medeiros Camara, Isabela Peregrino, Murillo de Albuquerque Regina, Eduardo Purgatto
Summary: This study evaluated the impact of the lyre and Geneva double-curtain training systems on the volatile composition of sparkling wines and found that different training systems and seasons can lead to variations in the chemical composition of sparkling wines.
Review
Nutrition & Dietetics
Hilton Cesar Rodrigues Magalhaes, Deborah dos Santos Garruti, Eliezer Avila Gandra, Eduardo Purgatto
Summary: The stage of ripeness determines the aromatic profiles of fruits, and the composition of volatile compounds plays a crucial role in fruit quality. Postharvest treatments have a direct impact on the biosynthesis of volatile compounds, with hormonal treatments and other postharvest treatments exhibiting different effects.
CURRENT NUTRITION & FOOD SCIENCE
(2023)
Article
Food Science & Technology
Lais Moro, Renata Vieira da Mota, Eduardo Purgatto, Fulvio Mattivi, Panagiotis Arapitsas
Summary: This study investigated the impact of methyl jasmonate (MeJa) treatment on grape juice production in two Brazilian regions using two Vitis labrusca cultivars. The results showed that MeJa treatment significantly improved the anthocyanic profile of Isabel Precoce juices. Furthermore, the concentration of hydroxycinnamates, especially their glucosides, increased with MeJa treatment. New biomarkers of MeJa treatment were identified, indicating a possible positive effect on the antioxidant properties of grape juice.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Bruno Silvestre Lira, Maria Jose Oliveira, Lumi Shiose, Mateus Henrique Vicente, Gabriel Ponciano Carvalho Souza, Eny Iochevet Segal Floh, Eduardo Purgatto, Fabio Tebaldi Silveira Nogueira, Luciano Freschi, Magdalena Rossi
Summary: SlBBX28 is a positive regulator of auxin metabolism and signaling, affecting plant growth and flower number in tomato. It promotes auxin production and signaling, ultimately leading to proper hypocotyl elongation, leaf expansion, and inflorescence development, which are crucial traits determining tomato yield.
PLANT MOLECULAR BIOLOGY
(2022)
Article
Plant Sciences
Ximena Chirinos, Shiyu Ying, Maria Aurineide Rodrigues, Elie Maza, Anis Djari, Guojian Hu, Mingchun Liu, Eduardo Purgatto, Sylvie Fournier, Farid Regad, Mondher Bouzayen, Julien Pirrello
Summary: The transition to fruit ripening is a complex process that involves multihormonal control, starting in the locular tissue before extending to the pericarp. This study reveals the transcriptomic reprogramming associated with tomato fruit ripening and highlights the crucial role of auxin in the initiation of ripening.
