Journal of Experimental Botany最新文献_第10页

Innovative modeling on the effects of low-temperature stress on rice yields. 低温胁迫对水稻产量影响的创新模型。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-25 DOI: 10.1093/jxb/erae452

Yanying Shi, Haoyu Ma, Tao Li, Erjing Guo, Tianyi Zhang, Xijuan Zhang, Xianli Yang, Lizhi Wang, Shukun Jiang, Yuhan Deng, Kaixin Guan, Mingzhe Li, Zhijuan Liu, Xiaoguang Yang

{"title":"Innovative modeling on the effects of low-temperature stress on rice yields.","authors":"Yanying Shi, Haoyu Ma, Tao Li, Erjing Guo, Tianyi Zhang, Xijuan Zhang, Xianli Yang, Lizhi Wang, Shukun Jiang, Yuhan Deng, Kaixin Guan, Mingzhe Li, Zhijuan Liu, Xiaoguang Yang","doi":"10.1093/jxb/erae452","DOIUrl":"10.1093/jxb/erae452","url":null,"abstract":"The increasing frequency and intensity of low-temperature events in temperate and cold rice production regions threatens rice yields under climate change. While process-based crop models can project climate impacts on rice yield, their accuracy under low-temperature conditions has not been well evaluated. Our 6 year chamber experiments revealed that low temperatures reduce spikelet fertility from panicle initiation to flowering, grain number per spike during panicle development, and grain weight during grain filling. We examined the algorithms of spikelet fertility response to temperature used in crop models. The results showed that simulation performance is poor for crop yields if the same function was used at different growth stages outside the booting stage. Indeed, we replaced the algorithm for the spikelet fertility parameter of the ORYZA model and developed the function of estimated grain number per spike and grain weight. After that, the algorithm with improved equations was applied to 10 rice growth models. New functions considered the harmful effects of low temperatures on rice yield at different stages. In addition, the threshold temperatures of cold tolerance were set for different rice varieties. The improved algorithm enhances the ability of the models to simulate rice yields under climate change, providing a more reliable tool for adapting rice production to future climatic challenges.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":"1230-1243"},"PeriodicalIF":5.6,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142668157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Reductions in mesophyll conductance under drought stress are influenced by increases in cell wall chelator-soluble pectin content and denser microfibril alignment in cotton.

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-25 DOI: 10.1093/jxb/erae467

Dongsheng Sun, Zhangying Lei, Marc Carriquí, Yujie Zhang, Tianyang Liu, Shengnan Wang, Kunhao Song, Lan Zhu, Wangfeng Zhang, Yali Zhang

{"title":"Reductions in mesophyll conductance under drought stress are influenced by increases in cell wall chelator-soluble pectin content and denser microfibril alignment in cotton.","authors":"Dongsheng Sun, Zhangying Lei, Marc Carriquí, Yujie Zhang, Tianyang Liu, Shengnan Wang, Kunhao Song, Lan Zhu, Wangfeng Zhang, Yali Zhang","doi":"10.1093/jxb/erae467","DOIUrl":"10.1093/jxb/erae467","url":null,"abstract":"Plants commonly undergo leaf morphoanatomy and composition modifications to cope with drought stress, and these tend to reduce mesophyll conductance to CO2 diffusion (gm), a key limitation to photosynthesis. The cell wall appears to play a crucial role in this reduction, yet the specific effect of cell wall component on gm and the underlying regulatory mechanisms of cell wall thickness (Tcw) variation are not well understood. In this study, we subjected cotton plants to varying levels of water deficit to investigate the impact of leaf cell wall component and the arrangement patterns of microfibrils within cell walls on Tcw and leaf gas exchange. Drought stress resulted in a significant thickening of cell walls and a decrease in gm. Concurrently, drought stress increased the content of chelator-soluble pectin and cellulose while reducing hemicellulose content. The alignment of cellulose microfibrils became more parallel and their diameter increased under drought conditions, suggesting a decrease in cell wall effective porosity which coincides with the observed reduction in gm. This research demonstrates that reduced gm typically observed under drought stress is related not only to thickened cell walls, but also to ultra-anatomical and compositional variations. Specifically, increases in cellulose content, diameter, and a highly aligned arrangement of cellulose microfibrils collectively contributed to an increase in Tcw, which, together with increases in chelator-soluble pectin content, resulted in an increased cell wall resistance to CO2 diffusion.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":"1116-1130"},"PeriodicalIF":5.6,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143023719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

High-throughput screening of wheat leaf dark respiration identifies significant genetic control.

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-25 DOI: 10.1093/jxb/erae519

Rubén Vicente, Alisdair R Fernie, Estefanía Uberegui

引用次数: 0

Peroxisomal dependent signalling and dynamics modulate plant stress responses: reactive oxygen and nitrogen species as key molecules.

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-24 DOI: 10.1093/jxb/eraf072

E Molina-Moya, A Rodríguez-González, M A Peláez-Vico, Luisa M Sandalio, María C Romero-Puertas

{"title":"Peroxisomal dependent signalling and dynamics modulate plant stress responses: reactive oxygen and nitrogen species as key molecules.","authors":"E Molina-Moya, A Rodríguez-González, M A Peláez-Vico, Luisa M Sandalio, María C Romero-Puertas","doi":"10.1093/jxb/eraf072","DOIUrl":"https://doi.org/10.1093/jxb/eraf072","url":null,"abstract":"Plant peroxisomes are organelles housing different key metabolic pathways in the cell such as photorespiration and fatty acid β-oxidation. The metabolism of phytohormones, polyamines and other key signalling molecules such as reactive oxygen and nitrogen species (ROS and RNS) are housed in these organelles. The presence of a complex antioxidant system that may regulate ROS/RNS level makes peroxisomes a key organelle governing its dependent signalling. The evolution of -omics technologies and the existence of mutants with specifically altered ROS metabolism in peroxisomes, have provided us with a large amount of data and genes that could be regulated in plant responses to stress. All these data point to the existence of a specific transcriptomic footprint associated with peroxisomes. Furthermore, advances in microscopy and the implementation of new molecules have allowed us to visualize organelles in vivo and obtain detailed information about the dynamics of these organelles involving changes in their velocity, peroxules formation and proliferation. In this review, we update the latest information about peroxisomal metabolism and signalling, mainly related to ROS/RNS under control and stress conditions and how the different stimuli affect the plasticity and dynamic of the organelles, which can contribute in turn to plant responses to these stimuli.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143483342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Nicotiana benthamiana VASCULAR-RELATED NAC-DOMAIN7-2 (NbVND7-2) has a role in xylem formation during interfamily grafting.

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-23 DOI: 10.1093/jxb/eraf074

Chaokun Huang, Koichi Toyokura, Ei-Ichi Murakami, Aiko Ishiwata, Ken-Ichi Kurotani, Michitaka Notaguchi

{"title":"Nicotiana benthamiana VASCULAR-RELATED NAC-DOMAIN7-2 (NbVND7-2) has a role in xylem formation during interfamily grafting.","authors":"Chaokun Huang, Koichi Toyokura, Ei-Ichi Murakami, Aiko Ishiwata, Ken-Ichi Kurotani, Michitaka Notaguchi","doi":"10.1093/jxb/eraf074","DOIUrl":"https://doi.org/10.1093/jxb/eraf074","url":null,"abstract":"VASCULAR-RELATED NAC-DOMAIN7 (VND7) is a transcription factor gene that plays a critical role in xylem differentiation. The ectopic expression of VND7 induces the formation of secondary cell walls with spiral patterns in multiple plant cell types. In the present study, we have identified four homologs of VND7 in Nicotiana benthamiana and assigned them the names NbVND7-1 to NbVND7-4. Particularly, NbVND7-1 and NbVND7-2 were highly expressed during N. benthamiana and Arabidopsis thaliana (Nb/At) interfamily grafting. Analysis of the promoter GUS reporter lines of NbVND7 genes elucidated the expression of NbVND7-1 and NbVND7-2 in xylem tissues of intact and grafted plants, and those of NbVND7-3 and NbVND7-4 in internal phloem tissues. Gene network analysis revealed the downstream genes of each NbVND7 homolog and highlighted the association of NbVND7-1 and NbVND7-2 with xylem formation. A 𝛽-estradiol-inducible system for NbVND7-2 demonstrated that NbVND7-2 promotes ectopic xylem vessel differentiation in N. benthamiana seedlings and in the stem tissues at graft junction. Induction of NbVND7-2 at graft junction enhanced ectopic xylem formation in the callus tissues proliferated at graft boundary, accelerated the initiation of water transport from stock to scion, and enhanced scion stem growth after grafting. This study revealed a role of NbVND7 genes in xylem formation that can enhance Nicotiana interfamily grafting.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143483393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Symbiotic nitrogen fixation: a launchpad for investigating old and new challenges. 共生固氮：研究新旧挑战的起点。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-22 DOI: 10.1093/jxb/erae510

Maurizio Chiurazzi, Giovanna Frugis, Lorella Navazio

引用次数: 0

A survey of triploid block inconsistency: potential mechanisms and evolutionary implications on polyploid speciation.

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-21 DOI: 10.1093/jxb/eraf050

Susnata Salony, Josselin Clo, Filip Kolář, Clément Lafon Placette

{"title":"A survey of triploid block inconsistency: potential mechanisms and evolutionary implications on polyploid speciation.","authors":"Susnata Salony, Josselin Clo, Filip Kolář, Clément Lafon Placette","doi":"10.1093/jxb/eraf050","DOIUrl":"https://doi.org/10.1093/jxb/eraf050","url":null,"abstract":"The triploid block, primarily caused by endosperm developmental issues, is known as a significant barrier to interploidy hybridization among flowering plants and thereby, polyploid speciation. However, its strength varies across taxa, with some instances of leakiness, questioning its universal role as a barrier. We conducted a literature survey to explore the causes of the variation in the strength of triploid block across 11 angiosperm families. We particularly assessed the impact of interploidy cross direction, types of endosperm development, endosperm persistence at seed maturity, and divergence between cytotypes using a Bayesian meta-analysis. We found a significant influence of the type of endosperm in shaping variation in triploid block strength. Other factors tested had no impact on triploid seed viability, likely due to limited data and inconsistencies in estimation methods across the literature. In addition, triploid seed viability in experimental crosses was sometimes correlated to the occurrence of triploid hybrids in nature, sometimes not, suggesting a mixed role of the triploid block in shaping interspecies gene flow. Altogether, our study highlights the need for unified approaches in future studies on the triploid block to advance our understanding of its variation and evolutionary implications.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143468053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Potential unrecognized redox-active atypical thioredoxins in eukaryote photosynthetic organisms.

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-21 DOI: 10.1093/jxb/eraf066

Linda de Bont, Natacha Donnay, Frédérique Favier, Jérémy Couturier, Claude Didierjean, Nicolas Rouhier

{"title":"Potential unrecognized redox-active atypical thioredoxins in eukaryote photosynthetic organisms.","authors":"Linda de Bont, Natacha Donnay, Frédérique Favier, Jérémy Couturier, Claude Didierjean, Nicolas Rouhier","doi":"10.1093/jxb/eraf066","DOIUrl":"https://doi.org/10.1093/jxb/eraf066","url":null,"abstract":"Photosynthetic organisms have a high diversity of proteins belonging to the thioredoxin (TRX) superfamily. It comprises more than 150 proteins distributed in different families and classes, including in particular thioredoxins, glutaredoxins, protein disulfide isomerases, thiol peroxidases or glutathione transferases, which share the thioredoxin structural fold. Many of them have one or two redox-active cysteines and a characteristic cis-proline at specific positions, but also additional domains or secondary structures at either end or inserted into the protein core. With the aim of further describing the TRX family in plants, we identified a set of 17 atypical TRX-like proteins from Arabidopsis thaliana, which have not been considered before despite having both a TRX fold and the CxxC/S signature typical of redox-active TRX. The in silico sequence and structure analyses revealed that they are distributed in eight distinct classes with unique active site signatures and structures, some with DsbA and peroxiredoxin-like folds. The distinct subcellular localizations (plastids, mitochondria, extracellular space) and gene expression profiles suggest that these proteins are involved in diverse cellular processes, further expanding the set of proteins involved in redox regulation and/or stress adaptation. These results further reveal the diversity in structure and function of atypical TRXs in plants.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143468060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Flower jasmonates control fertility but largely disconnect from defense metabolites in reproductive tissues of rice (Oryza sativa L.).

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-20 DOI: 10.1093/jxb/eraf073

Kaori Fukumoto, Yuko Hojo, Hiroko Nakatani, David Wari, Tomonori Shinya, Ivan Galis

{"title":"Flower jasmonates control fertility but largely disconnect from defense metabolites in reproductive tissues of rice (Oryza sativa L.).","authors":"Kaori Fukumoto, Yuko Hojo, Hiroko Nakatani, David Wari, Tomonori Shinya, Ivan Galis","doi":"10.1093/jxb/eraf073","DOIUrl":"https://doi.org/10.1093/jxb/eraf073","url":null,"abstract":"While sterile phenotypes of Osjar1 and Osaoc (hebiba) mutants corroborate the essential role of jasmonates (JAs) in reproductive development of rice (Oryza sativa L.), it remains unclear how other JA-dependent defense functions operate in reproductive tissues. We show that various JAs, including bioactive JA-Ile, gradually accumulate in the rice spikelets, and peak at anthesis, but majority of JAs remain localized in the stamens. While other spikelet parts contained only a low basal level of JAs, whole flowers responded to mechanical damage by the elicitation of a strong JA burst. Similarly, whole flowers increased their already present basal levels of defense metabolites in response to wounding, namely phenolamides and momilactone diterpenes, but these contents were only partially dependent on JA. Our data suggest that while JAs acquired essential role(s) in rice fertility, floral defense was largely diverted to yet another signaling pathway(s) that complement the canonical JA and/or JA-Ile stress signaling in reproductive parts of rice.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143458236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Diverse roles of ethylene in maize growth and development and its importance in shaping plant architecture.

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-02-20 DOI: 10.1093/jxb/eraf062

Alejandro Aragón-Raygoza, Josh Strable

{"title":"Diverse roles of ethylene in maize growth and development and its importance in shaping plant architecture.","authors":"Alejandro Aragón-Raygoza, Josh Strable","doi":"10.1093/jxb/eraf062","DOIUrl":"https://doi.org/10.1093/jxb/eraf062","url":null,"abstract":"The gaseous plant hormone ethylene is a key developmental and growth regulator, and a pivotal endogenous response signal to abiotic and biotic interactions, including stress. Much of what is known about ethylene biosynthesis, perception and signaling comes from decades of research primarily in Arabidopsis thaliana and other eudicot model systems. In contrast, detailed knowledge on the ethylene pathway and response to the hormone is markedly limited in maize (Zea mays L.), a global cereal crop that is a major source of calories for humans and livestock, as well as a key industrial biofeedstock. Recent reports of forward screens and targeted reverse genetics have provided important insight into conserved and unique differences of the ethylene pathway and downstream responses. Natural and edited allelic variation in the promoter regions and coding sequences of ethylene biosynthesis and signaling genes alters maize shoot and root architectures, and plays a crucial role in biomass and grain yields. This review discusses recent advances in ethylene research in maize with an emphasis on ethylene's role in regulating growth and development of the shoot and root systems, and ultimately how this crucial hormone impacts plant architecture and grain yield.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143458235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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