Plant Biology最新文献_第5页

Photosynthetic light-response curves in soybean: Impact of nitrogen availability and water deficit during seed filling 大豆光合光响应曲线：灌浆过程中氮有效性和水分亏缺的影响。

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-17 Epub Date: 2026-07-10 DOI: 10.1111/plb.70248

V. V. Ergo, F. Salvagiotti, D. F. Luna, C. S. Carrera

引用次数: 0

Effects of ascorbic acid and salicylic acid on drought resilience and mitigation of lead and cadmium toxicity in dryland maize (Zea mays L.) 抗坏血酸和水杨酸对旱地玉米抗旱性和减轻铅镉毒性的影响

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-17 Epub Date: 2026-06-29 DOI: 10.1111/plb.70250

F. Ullah, S. Saqib, W. Zaman, H. Qin-Zheng, L. Zhao, Y.-C. Xiong

引用次数: 0

DNA methylome responses to biotic and abiotic stress in Arabidopsis thaliana: A multi-study analysis. 拟南芥DNA甲基组对生物和非生物胁迫的响应：一项多研究分析。

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-14 DOI: 10.1111/plb.70291

R Behl, J J Gallo-Franco, R R Hazarika, Z Zhang, F Wilming, J P Schnitzler, C Lindermayr, F Johannes

{"title":"DNA methylome responses to biotic and abiotic stress in Arabidopsis thaliana: A multi-study analysis.","authors":"R Behl, J J Gallo-Franco, R R Hazarika, Z Zhang, F Wilming, J P Schnitzler, C Lindermayr, F Johannes","doi":"10.1111/plb.70291","DOIUrl":"https://doi.org/10.1111/plb.70291","url":null,"abstract":"Rationale: Plants experience diverse biotic and abiotic stresses that can induce changes in DNA methylation. However, comparisons among existing studies are complicated by differences in analytical methods and experimental designs. We aimed to identify shared and stress-specific DNA methylation responses across studies.Methods: We reanalysed 16 whole-genome bisulphite sequencing datasets from 13 Arabidopsis thaliana studies using a unified bioinformatics pipeline. Differentially methylated regions (DMRs) were assessed in the CG, CHG and CHH contexts and examined in relation to genes, transposable elements (TEs), Gene Ontology terms, gene-proximal TE superfamilies and epimutation-prone loci.Results: Global methylation levels were generally stable, whereas the number and genomic distribution of DMRs varied according to stress type and methylation context. CG-DMRs occurred primarily in gene bodies, while CHG- and CHH-DMRs were enriched in TEs. Functional analysis identified shared stress-related processes across conditions. Gene-proximal LINE/L1, RathE1_cons and DNA/HAT elements were enriched for stress-responsive methylation changes. A subset of stress-associated CG-DMRs overlapped loci known to accumulate stable epimutations over generations.Conclusions: Standardized cross-study analysis revealed both shared and stress-specific methylation patterns. The association of stress-responsive DMRs with gene-proximal TEs and epimutation-prone loci suggests potential links among environmental responses, genome regulation and long-term epigenetic variation.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Divergent structure-function coordination shapes leaf thermal tolerance in Mediterranean tree species. 不同的结构功能协调决定了地中海树种叶片的耐热性。

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-14 DOI: 10.1111/plb.70289

L Friulla, L M Iozia, M F Crescente, L Varone

{"title":"Divergent structure-function coordination shapes leaf thermal tolerance in Mediterranean tree species.","authors":"L Friulla, L M Iozia, M F Crescente, L Varone","doi":"10.1111/plb.70289","DOIUrl":"https://doi.org/10.1111/plb.70289","url":null,"abstract":"Increasing temperatures impair photosynthetic apparatus by damaging photosystem II (PSII) efficiency. We evaluated the relevance of two thermal indices (Tcrit and T50) as indicators of the PSII resistance to thermal stress of Quercus ilex, Acer campestre and Fraxinus ornus in the urban area of Rome. Tcrit (critical temperature) and T50, that is the temperature at which the maximum PSII efficiency (Fv/Fm) decreased by 15% and 50%, were estimated by modelling Fv/Fm response curves of leaves exposed to the temperature range of 25-60 °C. To evaluate the functional relevance, Tcrit and T50 data were integrated with leaf functional traits using a multivariate analysis approach. Q. ilex exhibited a lower Tcrit than A. campestre and F. ornus. T50 was similar between species. In Q. ilex, early Fv/Fm decline was consistent with an early photoprotective downregulation rather than reduced heat resistance, with PSII activity persisting even at extreme temperatures. A. campestre and F. ornus maintained high Fv/Fm up to Tcrit rapidly collapsing beyond this threshold. The contribution of physiological and morphological traits to thermal resistance was both metric-dependent and species-specific. Morphological and physiological traits were primarily tied to Tcrit and T50, respectively. In Q. ilex, morphological traits explained a greater variance in both thermal indices, while physiological traits dominated in A. campestre, and a shared physiological-morphological contribution prevailed in F. ornus. Thermal resistance arose from the coordinated interplay between structure and function, reflecting distinct species-specific ecological strategies.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148962824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Fusarium verticillioides seed inoculation modifies maize cell wall responses to subsequent Sesamia nonagrioides infestation. 黄萎病镰刀菌种子接种改变了玉米细胞壁对后续非农业芝麻病侵染的反应。

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-10 DOI: 10.1111/plb.70284

N Gesteiro, A Butrón, P Lobagueira, X C Souto, R A Malvar, R Santiago

{"title":"Fusarium verticillioides seed inoculation modifies maize cell wall responses to subsequent Sesamia nonagrioides infestation.","authors":"N Gesteiro, A Butrón, P Lobagueira, X C Souto, R A Malvar, R Santiago","doi":"10.1111/plb.70284","DOIUrl":"10.1111/plb.70284","url":null,"abstract":"Maize resistance to stem borers and fungal infection is strongly influenced by cell wall composition, but little is known about how prior fungal seed colonization affects subsequent insect-induced cell wall responses. Therefore, this study evaluated whether seed inoculation with Fusarium verticillioides modifies constitutive and induced cell wall defences against Sesamia nonagrioides infestation in maize. Seven maize inbred lines were grown under four treatments combining the presence or absence of F. verticillioides seed inoculation and S. nonagrioides infestation. Tunnel length, lignin content and composition, and cell wall-bound hydroxycinnamates were quantified in stem pith tissue. Treatment effects were mainly detected in lignin composition and hydroxycinnamate accumulation, whereas total Klason lignin and p-coumaric acid were not significantly altered. In non-inoculated plants, S. nonagrioides infestation reduced syringyl lignin subunits (S), ferulic acid and diferulate contents. In contrast, in plants derived from F. verticillioides-inoculated seeds, insect infestation increased ferulic acid and diferulates and shifted lignin composition, reducing S and the syringyl/guaiacyl ratio (S/G) while increasing guaiacyl lignin subunits (G). These responses were strongly genotype-dependent. A multiple regression model indicated that constitutive levels of S, ferulic acid, p-coumaric acid and diferulate 8-O-4, together with induced changes in G, explained most of the variation in relative tunnel length. Overall, these results show that maize resistance to S. nonagrioides involves both constitutive cell wall traits and inducible cell wall remodelling, and that prior seed colonization by F. verticillioides can modify the direction and magnitude of these responses, highlighting the importance of stress history and genotype in maize defence.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148928565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Mixed-vertebrate pollination traits and pollinators of Haageocereus acranthus (Cactaceae) in a lomas desert ecosystem of coastal Peru. 秘鲁沿海洛玛斯沙漠生态系统中仙人掌科Haageocereus acranthus的混合脊椎动物传粉特性和传粉者。

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-08 DOI: 10.1111/plb.70282

B Garcia-Simpson, B A Prado, J J Pellón, A Valiente-Banuet

{"title":"Mixed-vertebrate pollination traits and pollinators of Haageocereus acranthus (Cactaceae) in a lomas desert ecosystem of coastal Peru.","authors":"B Garcia-Simpson, B A Prado, J J Pellón, A Valiente-Banuet","doi":"10.1111/plb.70282","DOIUrl":"https://doi.org/10.1111/plb.70282","url":null,"abstract":"Cacti rely mostly on animals for pollen transfer and fruit set and constitute key elements of arid and semi-arid ecosystems of the New World. Although bee pollination is ancestral, systems supported by birds, moths, bats and mixed strategies have evolved. Despite the ecological uniqueness and extreme seasonality of the fog-dependent lomas ecosystem of coastal Peru, cactus pollination remains unstudied. This work examines Haageocereus acranthus, a common columnar cactus of this ecosystem, in a population where individuals consistently produce either white or pink-red flowers. It was hypothesized that white flowers would be associated with bat pollination and pink-red flowers with hummingbird pollination, reflected in differences in floral morphology, phenology and pollinator visitation. Year-round monitoring of a population was conducted to characterize flowering phenology. Floral morphology, daily anthesis patterns and nectar production were quantified and compared between colour morphotypes. Floral visitor frequency and behaviour were recorded using trail cameras and compared between morphotypes to assess visitation preference. Floral phenology, morphology and nectar characteristics were broadly consistent with vertebrate pollination, showing traits associated primarily with bat pollination but also compatible with hummingbird pollination. These floral traits did not differ between colour morphotypes. Hummingbirds were the most frequent visitors, followed by bats, yet neither group showed a preference for a specific flower colour. Our findings support a mixed-pollination system involving both hummingbirds and bats in an ecosystem where the availability of pollinators could shift across geographic or temporal scales. This mixed strategy could reduce vulnerability to the absence or decline of specific pollinator groups, ensuring consistent reproductive success.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148910218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Evidence for partial mycoheterotrophy during fruiting in two leafless orchids, Cremastra aphylla and C. saprophytica. 两种无叶兰科植物——葡萄蕊和腐生兰在结实过程中部分分枝异养的证据。

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-04 DOI: 10.1111/plb.70290

K Suetsugu

{"title":"Evidence for partial mycoheterotrophy during fruiting in two leafless orchids, Cremastra aphylla and C. saprophytica.","authors":"K Suetsugu","doi":"10.1111/plb.70290","DOIUrl":"https://doi.org/10.1111/plb.70290","url":null,"abstract":"The evolutionary transition from autotrophy to full mycoheterotrophy is often viewed as a progressive loss of photosynthetic capacity, yet comparative studies of closely related leafless orchids that retain residual photosynthesis remain scarce. The Cremastra appendiculata species complex provides a valuable system for testing whether dependence on fungal carbon varies among leafless species. We compared the nutritional modes of two closely related leafless orchids, Cremastra aphylla and C. saprophytica, at flowering and fruiting using natural-abundance stable isotope analyses and measurements of chlorophyll concentration and fluorescence. Both species retained functional, albeit limited, photosynthetic capacity. From flowering to fruiting, chlorophyll concentrations and the maximum quantum yield of photosystem II increased, whereas δ13C values decreased, a pattern consistent with enhanced photosynthetic capacity during reproductive development. However, C. aphylla consistently showed greater 13C enrichment relative to autotrophic reference plants and had a significantly lower chlorophyll concentration during flowering than C. saprophytica, indicating greater dependence on fungal carbon. These results demonstrate that leaflessness does not necessarily imply full mycoheterotrophy and, more importantly, that dependence on fungal carbon can differ even between closely related leafless species. Together with developmental-stage-dependent changes within each species, these interspecific differences suggest that the transition from partial to full mycoheterotrophy can proceed through multiple incremental steps even after leaflessness has evolved.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148890542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Stress-specific metabolic and physiological responses to drought and waterlogging in Allium cepa L. and Allium × cornutum Clementi ex Vis. 葱和秋葵对干旱和涝渍的代谢和生理响应。

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-03 DOI: 10.1111/plb.70285

Ž Fredotović, B Soldo, B Urlić, K Radovani, E Vuko, J Puizina

{"title":"Stress-specific metabolic and physiological responses to drought and waterlogging in Allium cepa L. and Allium × cornutum Clementi ex Vis.","authors":"Ž Fredotović, B Soldo, B Urlić, K Radovani, E Vuko, J Puizina","doi":"10.1111/plb.70285","DOIUrl":"https://doi.org/10.1111/plb.70285","url":null,"abstract":"Increasing variability in water availability, caused by changing climatic conditions, is a major constraint for onion production. The present study investigated the physiological, metabolic and molecular responses of the diploid onion Allium cepa L. and the triploid hybrid Allium × cornutum Clementi ex Visiani under drought and waterlogging. Plants were exposed to controlled stress conditions, and responses were evaluated through relative water content (RWC), electrolyte leakage (EL), photosynthetic pigments, amino acid composition, total phenolic content (TPC), individual phenolic compounds and expression of antioxidant genes (CAT, SOD, AOX). Allium × cornutum showed a more pronounced response to drought, characterized by higher RWC, stable chlorophyll and carotenoid levels, increased accumulation of free amino acids and phenolic compounds, especially chlorogenic acid and quercetin glycosides, with significant upregulation of the antioxidant genes SOD and CAT. Allium cepa responded more strongly to waterlogging, showing increased amino acid levels, accumulation of quercetin and its glycosides, a marked increase in α-aminobutyric acid (AABA) concentration and higher expression of CAT and SOD. These results show distinct metabolic responses and physiological changes to drought and waterlogging, reflecting stress-specific adjustments under extreme water conditions and contributing to a better understanding of water stress adaptation in Allium species.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148885608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Effects of nitrogen addition on the photosynthetic responses of two dominant subtropical forest tree species to drought. 氮添加对两种亚热带优势树种对干旱光合反应的影响

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-03 DOI: 10.1111/plb.70286

D Wang, X Liang, X Tan, D Tang, H Liu, K Hussain, Q Li, X Liu, T Zhang, Y Jin, D Yin, Y Nie, W Shen, Q Ye

{"title":"Effects of nitrogen addition on the photosynthetic responses of two dominant subtropical forest tree species to drought.","authors":"D Wang, X Liang, X Tan, D Tang, H Liu, K Hussain, Q Li, X Liu, T Zhang, Y Jin, D Yin, Y Nie, W Shen, Q Ye","doi":"10.1111/plb.70286","DOIUrl":"https://doi.org/10.1111/plb.70286","url":null,"abstract":"Drought and nitrogen deposition are global change factors that influence forest dynamics by altering tree physiology and growth. Nevertheless, their interactive effects on tree physiology (especially leaf photosynthetic traits) remain poorly understood. Here, we examined the effects of drought (D), nitrogen addition (N) and their combination (DN) on the leaf photosynthetic traits of two dominant evergreen broadleaved tree species (Schima superba and Michelia macclurei) in a subtropical forest in southern China following a 2-year treatment period. For S. superba, compared to the control (CK), D significantly decreased the leaf photosynthetic rate (Asat), stomatal conductance (gs), stomatal size (SS) and leaf nitrogen content (LNC), but increased soluble sugar content (LSS). Although N exerted no significant effects on any leaf functional traits relative to CK, DN significantly alleviated drought-induced declines in Asat, gs, SS and LNC of S. superba when compared with D. This indicates a significant interactive effect between drought and nitrogen supply: nitrogen addition only mitigated drought stress damage under water limitation, rather than improving leaf photosynthetic performance under well-watered conditions. In contrast, M. macclurei showed no significant differences in leaf photosynthesis-related traits across the D, N, DN and CK treatments. The divergent responses of the two species to D might be related to inherent differences in their hydraulic traits (turgor loss point-TLP and minimum conductance-gmin) and root characteristics. The deep-rooted S. superba displayed significantly higher TLP and gmin than the shallow-rooted M. macclurei. Overall, our results suggest that S. superba is more sensitive to D than M. macclurei. The negative effects of D on leaf photosynthesis of S. superba were significantly alleviated by N in this subtropical forest.","PeriodicalId":220,"journal":{"name":"Plant Biology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148885674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Almost 200 years of anthocyanin research: What we know, what we assume and what remains unknown. 花青素研究近200年：我们知道什么，我们假设什么，还有什么未知。

IF 3.4 3区生物学

Plant Biology Pub Date : 2026-09-03 DOI: 10.1111/plb.70283

N Choudhary, N Khatun, B Pucker

引用次数: 0