Plant Physiology最新文献

Isoprenoids in eukaryotic phytoplankton: metabolic diversity, eco-physiology and biotechnological opportunities. 真核浮游植物中的类异戊二烯：代谢多样性、生态生理学和生物技术机遇。

IF 7.4 1区生物学

Plant Physiology Pub Date : 2025-07-25 DOI: 10.1093/plphys/kiaf314

Florian Pruckner,Luca Morelli,Michele Fabris

{"title":"Isoprenoids in eukaryotic phytoplankton: metabolic diversity, eco-physiology and biotechnological opportunities.","authors":"Florian Pruckner,Luca Morelli,Michele Fabris","doi":"10.1093/plphys/kiaf314","DOIUrl":"https://doi.org/10.1093/plphys/kiaf314","url":null,"abstract":"Isoprenoids are a diverse group of metabolites essential for algal physiology and ecology, which hold biotechnological potential. Despite recent interest in engineering microalgae for high-value isoprenoid production, understanding of their endogenous biosynthesis and regulatory networks remains fragmented. The major focus, in fact, is still on biotechnological applications rather than physiological relevance. This review bridges this gap by comprehensively evaluating isoprenoid biosynthesis and regulation across diverse microalgal taxa and by examining key differences and similarities between primary metabolic pathways: the chloroplast-localized 2-C-methyl-D-erythritol 4-phosphate (MEP) and cytosolic mevalonate (MVA) pathways. The distinct compartmentalization of these pathways is highlighted, especially in relation to lineage-specific evolutionary trajectories which derive from primary and secondary endosymbiotic events. Unique enzymatic adaptations and lineage-specific carotenoid biosynthesis enzymes make algal isoprenoid metabolism distinct from that of plants, fungi and animals, to reflect their ecology and physiology. Furthermore, we explore emerging evidence on multiple regulatory systems in isoprenoid biosynthesis, such as transcriptional and post-transcriptional regulatory mechanisms, alongside feedback loops and metabolite sensing systems. We discuss the complex interplay between MEP and MVA pathways, especially regarding metabolite crosstalk, differential localization of enzymes, and species-specific metabolic divergence. Using specialized metabolites like sterol sulfates and isoprenoid-derived domoic acid as examples, we highlight unresolved questions regarding isoprenoid ecological functions. Finally, we present synthetic biology strategies harnessing microalgal metabolism for sustainable terpenoid biosynthesis, identifying promising avenues for metabolic engineering and connecting this comprehensive review to the work currently ongoing in isoprenoid biotechnology.","PeriodicalId":20101,"journal":{"name":"Plant Physiology","volume":"4 1","pages":""},"PeriodicalIF":7.4,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144701315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Warming delays photosynthesis downregulation but not growth in a boreal conifer. 变暖延缓了北方针叶树光合作用的下调，但没有延缓其生长。

IF 7.4 1区生物学

Plant Physiology Pub Date : 2025-07-23 DOI: 10.1093/plphys/kiaf325

Laura Fernández de Uña

引用次数: 0

Turning the knobs: The impact of glutathionylation on starch metabolism. 转动旋钮：谷胱甘肽化对淀粉代谢的影响。

IF 7.4 1区生物学

Plant Physiology Pub Date : 2025-07-23 DOI: 10.1093/plphys/kiaf322

Anna Moseler

引用次数: 0

ELONGATED HYPOCOTYL 5 and miR156d orchestrate axillary meristem maturation and AHL15-mediated plant longevity. 细长的下胚轴5和miR156d协调腋生分生组织的成熟和ahl15介导的植物寿命。

IF 7.4 1区生物学

Plant Physiology Pub Date : 2025-07-23 DOI: 10.1093/plphys/kiaf329

Subhash Reddy Gaddam,Ashish Sharma,Anwesha Anyatama,Prabodh Kumar Trivedi

{"title":"ELONGATED HYPOCOTYL 5 and miR156d orchestrate axillary meristem maturation and AHL15-mediated plant longevity.","authors":"Subhash Reddy Gaddam,Ashish Sharma,Anwesha Anyatama,Prabodh Kumar Trivedi","doi":"10.1093/plphys/kiaf329","DOIUrl":"https://doi.org/10.1093/plphys/kiaf329","url":null,"abstract":"Plant development in Arabidopsis thaliana transitions through various stages influenced by environmental cues and internal processes. ELONGATED HYPOCOTYL 5 (HY5), a critical light-signaling transcription factor, plays a key role in plant development; however, its function in flowering and vegetative phase change (VPC) remains unclear. Our study reveals that HY5 directly regulates the expression of microRNA156d (miR156d) by binding to G-box-like motifs in the miR156d promoter. This interaction inversely modulates the expression of miR156d and SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) genes between wild-type and hy5 mutant plants. Notably, the miR156d overexpression (miR156dOX/hy5) plants exhibited delayed flowering, extended vegetative phases, and increased longevity, primarily due to a delay in the maturation of the axillary meristem associated with elevated levels of AT-HOOK MOTIF NUCLEAR LOCALIZED 15 (AHL15), a target of SPL genes. To investigate the role of AHL15, we developed knockdown lines for AHL15 in a miR156dOX background. Interestingly, the AHL15 knockdown combined with miR156dOX in hy5 plants (AHL15CR/miR156dOX/hy5) displayed hypersensitivity, bolting substantially earlier than other genotypes. This finding highlights the regulatory balance between HY5, miR156d, and AHL15. Overall, this interplay is crucial for controlling the transition from the vegetative to reproductive stages and influencing plant lifespan, providing essential insights into the molecular regulation of plant life history.","PeriodicalId":20101,"journal":{"name":"Plant Physiology","volume":"32 1","pages":""},"PeriodicalIF":7.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144693299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Losing is the new winning: Loss of histone demethylase DT2 enhances drought stress tolerance in rice. 损失是新的胜利：组蛋白去甲基酶DT2的损失增强了水稻的干旱胁迫耐受性。

IF 7.4 1区生物学

Plant Physiology Pub Date : 2025-07-23 DOI: 10.1093/plphys/kiaf328

Gunjan Sharma

引用次数: 0

C4 plants respond to phosphate starvation differently than C3 plants. C4植物对磷酸盐饥饿的反应与C3植物不同。

IF 7.4 1区生物学

Plant Physiology Pub Date : 2025-07-23 DOI: 10.1093/plphys/kiaf327

Raissa Krone,Silke Gerlich,Mette Mertens,Anna Koprivova,Philipp Westhoff,Stanislav Kopriva

{"title":"C4 plants respond to phosphate starvation differently than C3 plants.","authors":"Raissa Krone,Silke Gerlich,Mette Mertens,Anna Koprivova,Philipp Westhoff,Stanislav Kopriva","doi":"10.1093/plphys/kiaf327","DOIUrl":"https://doi.org/10.1093/plphys/kiaf327","url":null,"abstract":"C4 photosynthesis concentrates CO2 around RUBISCO, thereby decreasing photorespiration and leading to greater productivity. C4 photosynthesis evolved several times independently in different plant families including monocots and dicots. Beside changes in carbon fixation, C4 plants have also evolved several alterations in nitrogen and sulfur nutrition, leading to a better nitrogen use efficiency. Here, we utilized C3 and C4 species from two model systems, Flaveria and Panicum, to ask whether the evolution of C4 photosynthesis also affected phosphate homeostasis. The accumulation of phosphate within the plant shifted from the roots to the shoots with the evolution of C4, which can probably be explained by the higher demand of phosphate for completing the C4 cycle. A limitation of carbon assimilation by phosphate availability was shown solely for the C4 dicot plant, indicating a higher sensitivity to the starvation. Metabolic responses to phosphate limitation, including accumulation of amino acids, TCA cycle intermediates, as well as starch, were genus or species specific, rather than associated with the photosynthesis type. The expression of key phosphate starvation response genes was induced in all species by phosphate deficiency, while the high induction of microRNA399 coupled with a repression of PHOSPHATE 2 (PHO2) was especially prominent in the C4 monocot. Thus, it seems that C4 photosynthesis increases the demand for phosphate in the leaves and C4 plants either respond more strongly to phosphate deficiency than C3 plants or experience inhibition of photosynthesis.","PeriodicalId":20101,"journal":{"name":"Plant Physiology","volume":"704 1","pages":""},"PeriodicalIF":7.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144693219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Barley roots require HvGLU3 for cellulose biosynthesis. 大麦根部需要HvGLU3来进行纤维素的生物合成。

IF 7.4 1区生物学

Plant Physiology Pub Date : 2025-07-23 DOI: 10.1093/plphys/kiaf326

Blanca Jazmin Reyes-Hernández

引用次数: 0

Unbalanced Act: Biased Subgenome Expression During Canola Seed Development. 不平衡行为：油菜种子发育过程中偏亚基因组表达。

IF 7.4 1区生物学

Plant Physiology Pub Date : 2025-07-22 DOI: 10.1093/plphys/kiaf324

Neeta Lohani

引用次数: 0

Decoding the Regulatory Trio: The role of Nhd1-OsMYB110-OsMADS15 in Rice Flowering Time. 破解调控三位一体：Nhd1-OsMYB110-OsMADS15在水稻开花时间中的作用