Journal of Experimental Botany最新文献_第9页

Co-Translational mRNA Decay in Plants: Recent advances and future directions. 植物共翻译mRNA衰变：最新进展和未来方向。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/eraf146

Jean-Marc Deragon, Rémy Merret

引用次数: 0

Salinity tolerance in wheat: rethinking the targets. 小麦耐盐性指标的再思考。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/eraf152

Sergey Shabala, Xi Chen, Ping Yun, Meixue Zhou

{"title":"Salinity tolerance in wheat: rethinking the targets.","authors":"Sergey Shabala, Xi Chen, Ping Yun, Meixue Zhou","doi":"10.1093/jxb/eraf152","DOIUrl":"https://doi.org/10.1093/jxb/eraf152","url":null,"abstract":"Wheat is the major staple food in the human diet but its production under current climate scenarios is problematic, giving the predicted extent of land salinization and the fact that wheat is highly sensitive to soil salinity. This work aims to critically assess previous breeding efforts and pros- and cons- of targeting SOS1 and HKT1 genes to improve salinity stress tolerance in wheat. We argue that overexpressing SOS1 genes encoding Na+/H+ exchangers for Na+ removal from root to the rhizosphere may come with a caveat of increased loading of Na+ into the xylem and its delivery to the shoot, as well as numerous pleiotropic effects. Similarly, targeting HKT1 transporters for removing Na+ from the shoot comes with significant yield penalties due to the high carbon cost for osmotic adjustment; this strategy is also limited by the relatively small capacity of the root to store excessive Na+ without experiencing toxicity symptoms. We suggest that targeting tissue tolerance traits such as K+ retention in mesophyll and vacuolar Na+ sequestration in the shoot will be able to deliver better outcomes. We also call for a better understanding of the structure-function relationships of various isoforms for key genes involved in maintenance of Na+ and K+ homeostasis and a need for more in-depth physiological studies of wheat species with DD genome; a key contributor to tissue tolerance traits. Our arguments are supported by the bioinformatic analysis of the number of orthologs for some key gene between hexaploidy (AABBDD) and tetraploid (AABB) wheats and their structural differences.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143811539","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

Wilting may leave bees wanting: drops in turgor pressure may reduce viability of buzz-pollinated flowers. 枯萎可能会让蜜蜂想要：膨胀压力的下降可能会降低蜜蜂授粉的花朵的生存能力。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/eraf061

Benjamin S Lazarus, Agnes S Dellinger

引用次数: 0

Correction to: Hyperspectral imaging for chloroplast movement detection. 校正：用于叶绿体运动检测的高光谱成像。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/eraf043

引用次数: 0

Root RADAR: how 'rhizocrine' signals allow roots to detect and respond to their soil environment and stresses. 根系雷达：“根分泌”信号如何让根系探测并响应土壤环境和压力。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/erae490

Bipin K Pandey, Timothy S George, Hannah V Cooper, Craig J Sturrock, Tom Bennett, Malcolm J Bennett

引用次数: 0

Diverse alleles of Photoperiod-H1 directly and indirectly affect barley yield-related traits under contrasting photoperiods and PHYTOCHROME C backgrounds. 在不同光周期和光敏色素C背景下，不同的光周期h1等位基因直接或间接影响大麦产量相关性状。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/erae491

Jorge D Parrado, Gustavo A Slafer, Roxana Savin

{"title":"Diverse alleles of Photoperiod-H1 directly and indirectly affect barley yield-related traits under contrasting photoperiods and PHYTOCHROME C backgrounds.","authors":"Jorge D Parrado, Gustavo A Slafer, Roxana Savin","doi":"10.1093/jxb/erae491","DOIUrl":"10.1093/jxb/erae491","url":null,"abstract":"Barley traits that determine grain number are established between jointing and flowering. The timing of flowering is critical for adaptation and yield as it affects the fertility of both the main shoot and tiller spikes. The Photoperiod-H1 (PPD-H1) gene controls flowering time and impacts spike fertility and yield in barley; however, it is not known if these effects are truly pleiotropic or indirect. Recent findings indicated that under extremely long photoperiods, barley near-isogenic lines (NILs) with contrasting PPD-H1 alleles tend to flower simultaneously, allowing any genetic effects to be determined independently of flowering time. We examined the direct impact of PPD-H1 on barley spike fertility and yield in two PHYC genetic backgrounds. Experiments combined (i) two NILs for PPD-H1 alleles (ppd-H1 or Ppd-H1) under two contrasting PHYTOCHROME C genetic backgrounds (PhyC-l and PhyC-e), and (ii) two photoperiod conditions (12 h and 24 h). Under a 24 h photoperiod, the PPD-H1 gene had a minimal impact on flowering time. The ppd-H1 allele increased grain number by enhancing spike fertility, irrespective of the PHYC background, through better resource allocation to juvenile spikes and more efficient production of fertile florets. These findings support a pleiotropic effect of ppd-H1 in determining flowering time and establishment of yield component traits.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":"1678-1690"},"PeriodicalIF":5.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143032858","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

Protein phosphatase 2A B'α and B'β promote pollen wall construction partially through BRASSINAZOLE-RESISTANT 1-activated cysteine protease gene CEP1 in Arabidopsis. 蛋白磷酸酶2A B′α和B′β通过bzr1激活的CEP1部分促进拟南芥花粉壁构建。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/eraf004

Ying-Jie Gao, Yu-Lan Zhang, Wen-Hui Wang, Ammara Latif, Yue-Tian Wang, Wen-Qiang Tang, Cui-Xia Pu, Ying Sun

{"title":"Protein phosphatase 2A B'α and B'β promote pollen wall construction partially through BRASSINAZOLE-RESISTANT 1-activated cysteine protease gene CEP1 in Arabidopsis.","authors":"Ying-Jie Gao, Yu-Lan Zhang, Wen-Hui Wang, Ammara Latif, Yue-Tian Wang, Wen-Qiang Tang, Cui-Xia Pu, Ying Sun","doi":"10.1093/jxb/eraf004","DOIUrl":"10.1093/jxb/eraf004","url":null,"abstract":"A well-constructed pollen wall is essential for pollen fertility, which relies on the contribution of the tapetum. Our results demonstrated an essential role of the tapetum-expressed protein phosphatase 2A (PP2A) B'α and B'β in pollen wall formation. The b'aβ double mutant pollen grain harboured sticky remnants and tectum breakages, resulting in failed release. B'α and B'β functioned partially through dephosphorylating and activating BRASSINAZOLE-RESISTANT 1 (BZR1). The bzr1 bes1 double and higher-order mutants of this BZR1/BES1 family displayed similar defects in the pollen wall, while bzr1-1D, having an active form of the BRZ1 protein, exhibited fertile pollen grains in a B'α and B'β dependent manner. Correspondingly, the level of phospho-BZR1 was increased and dephospho-BZR1 was decreased in b'aβ and bzr1-1D/b'aβ at anther stages 8-9 as compared with Col-0 and bzr1-1D, respectively. A cysteine protease gene CEP1 was identified as a BZR1 target, whose transcriptional activation necessitates brassinosteroid (BR)-responsive elements in the promoter region and the BZR1 DNA binding domain. The mRNA level of CEP1 at stages 8-9 was extremely low in bzr1 and bzr1 bes1, but higher in Col-0 and bzr1-1D depending on B'α and B'β. Furthermore, cep1 mutants displayed similar defects in the pollen wall. In brief, this study uncovered a PP2A-BZR1-CEP1 regulatory module, providing a new insight into pollen maturation mechanisms.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":"1735-1751"},"PeriodicalIF":5.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142965304","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

Photoperiod insensitivity in crops. 作物的光周期不敏感。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/eraf153

Alberto González-Delgado, Félix J Martínez-Rivas, José M Jiménez-Gómez

引用次数: 0

Leaf carbon isotope composition: a key proxy for scaling up the best candidates. 叶片碳同位素组成：放大最佳候选植物的关键代理。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/eraf007

Nikolas Souza Mateus, Jose Lavres

引用次数: 0

Useful or merely convenient: can enzymatic antioxidant activity be used as a proxy for abiotic stress tolerance? 有用还是仅仅方便？关于酶抗氧化活性是否适合作为非生物胁迫耐受性指标的问题。

IF 5.6 2区生物学

Journal of Experimental Botany Pub Date : 2025-04-09 DOI: 10.1093/jxb/erae524

Le Xu, Huaqiong Liu, Ron Mittler, Sergey Shabala

{"title":"Useful or merely convenient: can enzymatic antioxidant activity be used as a proxy for abiotic stress tolerance?","authors":"Le Xu, Huaqiong Liu, Ron Mittler, Sergey Shabala","doi":"10.1093/jxb/erae524","DOIUrl":"10.1093/jxb/erae524","url":null,"abstract":"During their lifespan, plants are often exposed to a broad range of stresses that change their redox balance and lead to accumulation of reactive oxygen species (ROS). The traditional view is that this comes with negative consequences to cells structural integrity and metabolism and, to prevent this, plants evolved a complex and well-coordinated antioxidant defence system that relies on the operation of a range of enzymatic and non-enzymatic antioxidants (AO). Due to the simplicity of measuring their activity, and in light of the persistent dogma that stress-induced ROS accumulation is detrimental for plants, it is not surprising that enzymatic AOs have often been advocated as suitable proxies for stress tolerance as well as potential targets for improving tolerance traits. However, there are a growing number of reports showing either no changes or even down-regulation of AO systems in stressed plants. Moreover, ROS are recognized now as important second messengers operating in both local and systemic signalling, synergistically interacting with the primary stressor, to regulate gene expression needed for optimal acclimatization. This work critically assesses the suitability of using enzymatic AOs as a proxy for stress tolerance or as a target for crop genetic improvement. It is concluded that constitutively higher AO activity may interfere with stress-induced ROS signalling and be a disadvantage for plant stress tolerance.","PeriodicalId":15820,"journal":{"name":"Journal of Experimental Botany","volume":" ","pages":"1524-1533"},"PeriodicalIF":5.6,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142895078","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