Joey B Tanney,Martin Kemler,Maria Vivas,Michael J Wingfield,Bernard Slippers
{"title":"Silent invaders: the hidden threat of asymptomatic phytobiomes to forest biosecurity.","authors":"Joey B Tanney,Martin Kemler,Maria Vivas,Michael J Wingfield,Bernard Slippers","doi":"10.1111/nph.70209","DOIUrl":"https://doi.org/10.1111/nph.70209","url":null,"abstract":"Populations of diverse, unknown, and potentially pathogenic fungi and fungus-like organisms are continuously introduced into new locations via asymptomatic infections (e.g. as endophytes or latent pathogens) within internationally traded live plants. Interactions between these asymptomatic fungi and novel recipient host trees can be unpredictable, and urban introductions may act as bridgeheads into natural and managed forests. Historical examples of novel, highly destructive forest tree diseases highlight the potential threat of this pathway. As the trade in live plants continues to expand, the likelihood of high-impact incursions increases. This has led to calls for more proactive management, including more stringent treatment and regulatory standards, and even the phasing out of trade in plants determined to be an untenable risk to forest ecosystems. In this review, we discuss how biosecurity systems should consider advances in understanding the diversity and ecology of phytobiomes associated with asymptomatic plants and what measures can be considered to reduce this threat to global forest health.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"135 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114130","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}
Arpad E Thoma,Ylva Lekberg,Dávid U Nagy,Min Sheng,Erik Welk,Christoph Rosche
{"title":"Progress and future directions of biogeographical comparisons of plant-fungal interactions in invasion contexts.","authors":"Arpad E Thoma,Ylva Lekberg,Dávid U Nagy,Min Sheng,Erik Welk,Christoph Rosche","doi":"10.1111/nph.70228","DOIUrl":"https://doi.org/10.1111/nph.70228","url":null,"abstract":"Plant invasions are biogeographical phenomena that may involve shifts in belowground plant-fungal interactions, such as the release from fungal pathogens or more beneficial interactions with mutualists in nonnative ranges. However, native and nonnative ranges are not uniform but environmentally heterogeneous, and plant-fungal interactions are strongly shaped by spatio-environmental context. Intense discussion at the 45th New Phytologist Symposium revealed that we lack information on how well spatio-environmental variation within ranges has been considered in samplings and analyses of studies comparing plant-fungal interactions between ranges. Through a systematic review, we assessed the sampling quality of recent biogeographical studies. We found that the majority relied on a limited population sampling within each range, often covering only a small fraction of the species' spatial distribution and macroclimatic niche. Additionally, low similarity between the sampled climatic gradients in the native and nonnative ranges might have introduced false-positive differences across ranges. These sampling deficiencies may undermine the robustness and representativeness of range comparisons, thereby restricting our ability to accurately assess the role of plant-fungal interactions in invasion success. We recommend that future research incorporate broader and more comparable spatio-environmental variation in both ranges, and we provide practical guidelines for improving sampling designs.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"237 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114129","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}
Yan-Li Zhang,Arthur Gessler,Marco M Lehmann,Marcus Schaub,Matthias Saurer,Andreas Rigling,Mai-He Li
{"title":"Exogenous sugar addition can exacerbate root carbon limitation in trees.","authors":"Yan-Li Zhang,Arthur Gessler,Marco M Lehmann,Marcus Schaub,Matthias Saurer,Andreas Rigling,Mai-He Li","doi":"10.1111/nph.70231","DOIUrl":"https://doi.org/10.1111/nph.70231","url":null,"abstract":"In most tree species, roots serve as major carbon (C) sinks, where C is depleted first when C assimilation is limited. Recent methodological advancements in sugar infusion allow for a better understanding of physiological processes alleviating root C limitation. We conducted a glasshouse experiment with maple (Acer pseudoplatanus L.) and pine (Pinus sylvestris L.) saplings that underwent defoliation followed by either slow, fast, or no 13C-labeled glucose infusion. We measured photosynthetic parameters, nonstructural carbohydrate (NSC) concentrations, and δ13C in cellulose of leaves, twigs, and fine roots, as well as the isotopic composition of dark-respired CO2. Sugar infusion induced photosynthetic downregulation and leaf senescence in maple but not in pine. Leaf photosynthesis was negatively correlated with leaf NSC concentration in maple. These responses exacerbated root C limitation in maple. Conversely, pine maintained stable photosynthetic rates and needle NSC concentrations across treatments, showing the potential of sugar infusion to mitigate root C limitation. Our study suggests that exogenous sugar supply reduces the root C availability when it impairs a plant's photosynthetic performance. Species-specific differences influence infused sugar transport and overall source-sink responses. Alleviating C limitation in roots via exogenous sugar addition is feasible only if photosynthesis is not impeded.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"14 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114275","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}
Amy Waananen,Jennifer L Ison,Stuart Wagenius,Ruth G Shaw
{"title":"The fitness effects of outcrossing distance depend on parental flowering phenology in fragmented populations of a tallgrass prairie forb.","authors":"Amy Waananen,Jennifer L Ison,Stuart Wagenius,Ruth G Shaw","doi":"10.1111/nph.70240","DOIUrl":"https://doi.org/10.1111/nph.70240","url":null,"abstract":"The phenomena of isolation-by-distance and isolation-by-time shapecontra mating patterns and population genetic processes, such as inbreeding and outbreeding depression, which influence progeny fitness. However, the effects of parental isolation in time on offspring fitness remain understudied, especially in combination with isolation-by-distance. We planted offspring from a common garden experiment involving 13 populations of the tallgrass prairie forb Echinacea angustifolia into a prairie restoration and tracked their fitness over 16 yr. Parental source populations were up to 9 km apart, and flowering asynchronies spanned up to 13 d. Using Aster life-history analysis, we assessed how interparent distance and asynchrony affected offspring fitness. Interparent asynchrony modified the relationship between interparent distance and offspring fitness. Offspring with the highest fitness had parents from the most distant populations, with maternal plants flowering later than paternal plants. Notably, the order of parental flowering, rather than the absolute difference in timing, better predicted fitness. Nongenetic aspects of reproductive timing, such as morphological constraints, may have contributed to these effects. We suggest management strategies to promote outcrossing over space and time, including leveraging seed production environments.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"59 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114114","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}
Annayasa Modak,Shivani Singh,Chirag Singhal,Gouranga Upadhyaya,Jinia Chakrabarty,Sreeramaiah N Gangappa
{"title":"The E3 ubiquitin ligases RING DOMAIN OF UNKNOWN FUNCTION 1117 1 (RDUF1) and RDUF2 control seedling photomorphogenesis in Arabidopsis.","authors":"Annayasa Modak,Shivani Singh,Chirag Singhal,Gouranga Upadhyaya,Jinia Chakrabarty,Sreeramaiah N Gangappa","doi":"10.1111/nph.70169","DOIUrl":"https://doi.org/10.1111/nph.70169","url":null,"abstract":"The CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1)-ELONGATED HYPOCOTYL5 (HY5) circuit controls plant seedling photomorphogenesis. Regulation of HY5 protein levels is key for optimal photomorphogenic growth. This study identified the E3 ubiquitin ligases Really Interesting New Gene (RING) DOMAIN OF UNKNOWN FUNCTION 1117 1 (RDUF1) and RDUF2 as novel components of the COP1-HY5 pathway in Arabidopsis. The RDUF1 and RDUF2 knockout mutants exhibited longer hypocotyls with reduced photopigment accumulation than the wild-type. In comparison, the overexpression transgenic lines showed shorter hypocotyls with enhanced photomorphogenic responses in a wavelength-independent manner. HY5 directly binds to the RDUF1 and RDUF2 promoters through the G-box, activating their expression in response to light. Epistatic analysis and biochemical data showed that RDUF1 and RDUF2 genetically interact with and stabilize the HY5 protein, plausibly engaging the N77 part of HY5 and preventing COP1-mediated ubiquitination and degradation. In the dark, COP1 physically interacted with and ubiquitinated RDUF1 and RDUF2, subjecting them to degradation to keep HY5 levels low and promote skotomorphogenesis. However, light-mediated inhibition of COP1 activity mediated by photoreceptors increased RDUF1 and RDUF2 accumulation, enhancing HY5 protein stability and photomorphogenesis. This study establishes COP1-RDUF1/RDUF2-HY5 as a regulatory module of seedling photomorphogenesis under dynamic light cues.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"21 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144103693","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}
May T. S. Yeo, Alice L. M. Fairnie, Valentina Travaglia, Joseph F. Walker, Lucie Riglet, Selin Zeyrek, Edwige Moyroud
{"title":"The genetic basis of replicated bullseye pattern reduction across the Hibiscus trionum complex","authors":"May T. S. Yeo, Alice L. M. Fairnie, Valentina Travaglia, Joseph F. Walker, Lucie Riglet, Selin Zeyrek, Edwige Moyroud","doi":"10.1111/nph.70168","DOIUrl":"https://doi.org/10.1111/nph.70168","url":null,"abstract":"Summary<jats:list list-type=\"bullet\"> <jats:list-item>Colorful petal patterns fulfill important functions and constitute excellent systems to illuminate the evolutionary processes that generate morphological diversity or instead support the repetitive emergence of similar forms.</jats:list-item> <jats:list-item>Here, we combined phylogenomic approaches, genetic manipulations, molecular techniques, and bee behavioral experiments to (i) solve the species relationships across the <jats:italic>Trionum</jats:italic> complex, a small <jats:italic>Hibiscus</jats:italic> clade that displays bullseye petal patterns varying in size, hue, and composition, (ii) identify key genes involved in the production of bullseye pigmentation, and (iii) reveal molecular events underpinning pattern variation during the evolution of the group.</jats:list-item> <jats:list-item>We found that epidermal cell shape, texture, and pigmentation are genetically distinct and that pigmentation is the most labile feature across the group. We demonstrate that repetitive bullseye reduction events primarily occur through independent modifications of a single genetic locus encoding BERRY1, an R2R3 MYB (myeloblastosis) that regulates anthocyanin pigment production in petals. We also found that buff‐tailed bumblebees discriminate against flowers with smaller bullseye sizes, suggesting that changing bullseye proportions impact plant–pollinator interactions.</jats:list-item> <jats:list-item>Our results demonstrate how repeated mutations in a single locus led to morphological variation in petal patterning, a trait shown to impact plant fitness in other species and contribute to angiosperm reproductive isolation and speciation.</jats:list-item> </jats:list>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"32 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144104460","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}
Charlotte C Reed,Sharon M Hood,Aaron R Ramirez,Anna Sala
{"title":"Fire directly affects tree carbon balance and indirectly affects hydraulic function: consequences for post-fire mortality in two conifers.","authors":"Charlotte C Reed,Sharon M Hood,Aaron R Ramirez,Anna Sala","doi":"10.1111/nph.70212","DOIUrl":"https://doi.org/10.1111/nph.70212","url":null,"abstract":"The mechanistic links between fire-caused injuries and post-fire tree mortality are poorly understood. Current hypotheses differentiate effects of fire on tree carbon balance and hydraulic function, yet critical uncertainties remain about the relative importance of each and how they interact. We utilize two prescribed burns with Douglas-fir and ponderosa pine to examine: the relative evidence for fire-caused changes in hydraulic function and carbon dynamics, and how such impacts relate to fire injuries; which impacts most likely lead to post-fire mortality; and how these impacts vary by species and burn timing (fall vs spring). We find that fire-caused impacts to non-structural carbohydrates (NSC) are immediate, persistent, correlated with crown injury severity, and strongly related to post-fire mortality. By contrast, hydraulic impacts are delayed and not directly attributable to fire-caused injuries, although some burned trees do exhibit signs of increased hydraulic dysfunction and water stress before death. This suggests that fire may indirectly affect tree water relations, possibly through an interaction with direct fire impacts on NSC. These findings offer a more nuanced understanding of fire's effect on post-fire tree function and mortality and are important in the context of increased fire activity in forests globally.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"45 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144114287","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}
Paul Szejner, Yu Tang, Charlotte Angove, Pauliina Schiestl‐Aalto, Elina Sahlstedt, Giles Young, Daniel B. Nelson, Ansgar Kahmen, Matthias Saurer, Katja T. Rinne‐Garmston
{"title":"Opposing seasonal trends in source water and sugar dampen intra‐annual variability in tree rings oxygen isotopes","authors":"Paul Szejner, Yu Tang, Charlotte Angove, Pauliina Schiestl‐Aalto, Elina Sahlstedt, Giles Young, Daniel B. Nelson, Ansgar Kahmen, Matthias Saurer, Katja T. Rinne‐Garmston","doi":"10.1111/nph.70223","DOIUrl":"https://doi.org/10.1111/nph.70223","url":null,"abstract":"Summary<jats:list list-type=\"bullet\"> <jats:list-item>Variations of oxygen isotopes δ<jats:sup>18</jats:sup>O in tree rings provide critical insights into past climate and tree physiological processes, yet the mechanisms shaping the intra‐annual δ<jats:sup>18</jats:sup>O signals remain incompletely understood. To address this gap, we investigated how seasonal changes in source water, leaf water, and sugars influence δ<jats:sup>18</jats:sup>O recorded along the tree rings of <jats:italic>Pinus sylvestris</jats:italic> in Finland.</jats:list-item> <jats:list-item>We conducted a seasonal analysis measuring δ<jats:sup>18</jats:sup>O from needle water, source water, and phloem sugars and investigated the fraction of oxygen isotope exchange during wood formation.</jats:list-item> <jats:list-item>We found that seasonal δ<jats:sup>18</jats:sup>O amplitudes are significantly reduced from leaf water to tree rings, driven by opposing seasonal patterns in increasing source water δ<jats:sup>18</jats:sup>O and decreasing evaporative enrichment as relative humidity increases. Additionally, the isotope exchange between source water and phloem sugars further dampens seasonal δ<jats:sup>18</jats:sup>O signals in the rings.</jats:list-item> <jats:list-item>Our findings show that oxygen isotope exchange is critical in shaping δ<jats:sup>18</jats:sup>O signals, influencing the role of source water and relative humidity recorded on intra‐annual resolution. This refined understanding helps interpret tree physiological responses under changing conditions and improves climate reconstructions based on tree rings using intra‐annual resolution.</jats:list-item> </jats:list>","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"128 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144096850","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}
Qiaomu Li, Le Wang, Lauren E. Grubb, Mohana Talasila, Maria Camila Rodriguez Gallo, Devang Mehta, Sabine Scandola, Richard Glen Uhrig
{"title":"B4 Raf-like MAPKKK RAF24 regulates Arabidopsis thaliana flowering time through HISTONE MONO-UBIQUITINATION 2","authors":"Qiaomu Li, Le Wang, Lauren E. Grubb, Mohana Talasila, Maria Camila Rodriguez Gallo, Devang Mehta, Sabine Scandola, Richard Glen Uhrig","doi":"10.1111/nph.70192","DOIUrl":"https://doi.org/10.1111/nph.70192","url":null,"abstract":"<h2> Introduction</h2>\u0000<p>As sessile organisms, land plants are able to perceive and adapt to constantly changing external conditions, such as temperature, light and photoperiod. This ability enables them to adjust their developmental transitions, such as flowering time, in response to diel rhythms or seasonal changes (Mouradov <i>et al</i>., <span>2002</span>; Creux & Harmer, <span>2019</span>; Bao <i>et al</i>., <span>2020</span>). Premature flowering affects the overall fitness of plants, thereby negatively influencing crop yield and productivity (Gaudinier & Blackman, <span>2020</span>). To avoid this, plants employ a series of complex regulatory networks. To date, our knowledge of flowering rests largely at the transcriptional level, with numerous transcription factors having been identified to fine-tune flowering time. Ultimately, these networks culminate with <i>FLOWERING LOCUS C</i> (FLC), a major flowering repressor, directly regulating the expression of floral integrators, <i>FLOWERING LOCUS T</i> (FT) and <i>SUPPRESSOR OF OVEREXPRESSION OF CONSTANS1</i> (SOC1), to suppress premature flowering (Lee & Lee, <span>2010</span>; Deng <i>et al</i>., <span>2011</span>; Bao <i>et al</i>., <span>2020</span>).</p>\u0000<p>Post-translational modifications (PTMs), such as protein phosphorylation and ubiquitination, work synchronously with transcriptional changes to control flowering time (Linden & Callis, <span>2020</span>). Protein phosphorylation is directed by protein kinases, which transfer the phosphate group from adenosine triphosphate (ATP) to Ser, Thr and Tyr residues of a protein substrate (Ubersax & Ferrell, <span>2007</span>), resulting in a multitude of outcomes, including altered enzymatic activity, protein stability and subcellular localization (Humphrey <i>et al</i>., <span>2015</span>). For instance, CALCIUM-DEPENDENT PROTEIN KINASE28 (CPK28) directly phosphorylates PLANT U-BOX 25 (PUB25) and PUB26 to upregulate its ubiquitin ligase activity and ensure immune homeostasis (J. Wang <i>et al</i>., <span>2018</span>). So far, several kinases have been related to flowering time control (Ogiso <i>et al</i>., <span>2010</span>; Chen <i>et al</i>., <span>2020</span>; Li <i>et al</i>., <span>2022</span>; Sanagi <i>et al</i>., <span>2021</span>), including SHAGGY-LIKE KINASE 12 (SK12), which was recently resolved to phosphorylate the core flowering regulator CONSTANS (CO) causing rapid degradation of CO by the 26S proteasome, thereby repressing flowering (Chen <i>et al</i>., <span>2020</span>).</p>\u0000<p>In addition to phosphorylation, protein ubiquitination is also associated with flowering. Protein ubiquitination is mediated by a multi-enzymatic cascade. This involves E1 enzymes, which activate ubiquitin molecules that are then passed to E2 enzymes to form an E2-ubiquitin intermediate. Lastly, E3 enzymes direct the transfer of an ubiquitin moiety from E2 enzymes to specifically recognized protein targets, leading to the ubiquiti","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"33 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144104326","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}
Daniel P Yee,Caroline Juery,Gaëlle Toullec,Andrea Catacora-Grundy,Charlotte Lekieffre,Daniel Wangpraseurt,Johan Decelle
{"title":"Physiology and metabolism of eukaryotic microalgae involved in aquatic photosymbioses.","authors":"Daniel P Yee,Caroline Juery,Gaëlle Toullec,Andrea Catacora-Grundy,Charlotte Lekieffre,Daniel Wangpraseurt,Johan Decelle","doi":"10.1111/nph.70190","DOIUrl":"https://doi.org/10.1111/nph.70190","url":null,"abstract":"Symbiosis between eukaryotic microalgae and heterotrophic hosts is a widespread, phylogenetically convergent, and ecologically important phenomenon in aquatic ecosystems. Partners include taxonomically diverse microalgae interacting with multicellular or unicellular hosts in marine or freshwater environments. While progress has been made recently, there are still major knowledge gaps on the microenvironmental conditions of microalgae in hospite (e.g. nutrient and CO2 availability), the algal carbon metabolism (production and storage), and the cellular mechanisms of carbohydrate export to the host. This review aims to provide current knowledge on the physiology and metabolism of symbiotic microalgae, to highlight whether there are commonalities across different photosymbioses, and to identify new approaches and technologies for disentangling photosymbiotic interactions at relevant temporal and spatial scales.","PeriodicalId":214,"journal":{"name":"New Phytologist","volume":"124 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087643","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}